summaryrefslogtreecommitdiffstats
path: root/tools
Commit message (Collapse)AuthorAgeFilesLines
* Merge tag 'powerpc-4.21-1' of ↵Linus Torvalds2018-12-2715-16/+71
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Notable changes: - Mitigations for Spectre v2 on some Freescale (NXP) CPUs. - A large series adding support for pass-through of Nvidia V100 GPUs to guests on Power9. - Another large series to enable hardware assistance for TLB table walk on MPC8xx CPUs. - Some preparatory changes to our DMA code, to make way for further cleanups from Christoph. - Several fixes for our Transactional Memory handling discovered by fuzzing the signal return path. - Support for generating our system call table(s) from a text file like other architectures. - A fix to our page fault handler so that instead of generating a WARN_ON_ONCE, user accesses of kernel addresses instead print a ratelimited and appropriately scary warning. - A cosmetic change to make our unhandled page fault messages more similar to other arches and also more compact and informative. - Freescale updates from Scott: "Highlights include elimination of legacy clock bindings use from dts files, an 83xx watchdog handler, fixes to old dts interrupt errors, and some minor cleanup." And many clean-ups, reworks and minor fixes etc. Thanks to: Alexandre Belloni, Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Benjamin Herrenschmidt, Breno Leitao, Christian Lamparter, Christophe Leroy, Christoph Hellwig, Daniel Axtens, Darren Stevens, David Gibson, Diana Craciun, Dmitry V. Levin, Firoz Khan, Geert Uytterhoeven, Greg Kurz, Gustavo Romero, Hari Bathini, Joel Stanley, Kees Cook, Madhavan Srinivasan, Mahesh Salgaonkar, Markus Elfring, Mathieu Malaterre, Michal Suchánek, Naveen N. Rao, Nick Desaulniers, Oliver O'Halloran, Paul Mackerras, Ram Pai, Ravi Bangoria, Rob Herring, Russell Currey, Sabyasachi Gupta, Sam Bobroff, Satheesh Rajendran, Scott Wood, Segher Boessenkool, Stephen Rothwell, Tang Yuantian, Thiago Jung Bauermann, Yangtao Li, Yuantian Tang, Yue Haibing" * tag 'powerpc-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (201 commits) Revert "powerpc/fsl_pci: simplify fsl_pci_dma_set_mask" powerpc/zImage: Also check for stdout-path powerpc: Fix HMIs on big-endian with CONFIG_RELOCATABLE=y macintosh: Use of_node_name_{eq, prefix} for node name comparisons ide: Use of_node_name_eq for node name comparisons powerpc: Use of_node_name_eq for node name comparisons powerpc/pseries/pmem: Convert to %pOFn instead of device_node.name powerpc/mm: Remove very old comment in hash-4k.h powerpc/pseries: Fix node leak in update_lmb_associativity_index() powerpc/configs/85xx: Enable CONFIG_DEBUG_KERNEL powerpc/dts/fsl: Fix dtc-flagged interrupt errors clk: qoriq: add more compatibles strings powerpc/fsl: Use new clockgen binding powerpc/83xx: handle machine check caused by watchdog timer powerpc/fsl-rio: fix spelling mistake "reserverd" -> "reserved" powerpc/fsl_pci: simplify fsl_pci_dma_set_mask arch/powerpc/fsl_rmu: Use dma_zalloc_coherent vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver vfio_pci: Allow regions to add own capabilities vfio_pci: Allow mapping extra regions ...
| * selftests/powerpc: Add checks for transactional sigreturnBreno Leitao2018-12-213-1/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a new test case that creates a signal and starts a suspended transaction inside the signal handler. It returns from the signal handler with the CPU at suspended state, but without setting user context MSR Transaction State (TS) field. The kernel signal handler code should be able to handle this discrepancy instead of crashing. This code could be compiled and used to test 32 and 64-bits signal handlers. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * powerpc/perf: Update perf_regs structure to include SIERMadhavan Srinivasan2018-12-203-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On each sample, Sample Instruction Event Register (SIER) content is saved in pt_regs. SIER does not have a entry as-is in the pt_regs but instead, SIER content is saved in the "dar" register of pt_regs. Patch adds another entry to the perf_regs structure to include the "SIER" printing which internally maps to the "dar" of pt_regs. It also check for the SIER availability in the platform and present value accordingly Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * selftests/powerpc: Skip test instead of failingBreno Leitao2018-11-251-4/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current core-pkey selftest fails if the test runs without privileges to write into the core pattern file (/proc/sys/kernel/core_pattern). This causes the test to fail and give the impression that the subsystem being tested is broken, when, in fact, the test is being executed without the proper privileges. This is the current error: test: core_pkey tags: git_version:v4.19-3-g9e3363be9bce-dirty Error writing to core_pattern file: Permission denied failure: core_pkey This patch simply skips this test if it runs without the proper privileges, avoiding this undesired failure. CC: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> CC: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * selftests/powerpc: Create a new SKIP_IF macroBreno Leitao2018-11-251-0/+10
| | | | | | | | | | | | | | | | | | | | This patch creates a new macro that skips a test and prints a message to stderr. This is useful to give an idea why the tests is being skipped, other than just skipping the test blindly. Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * selftests/powerpc: Allocate base registersBreno Leitao2018-11-257-10/+8Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some ptrace selftests are passing input operands using a constraint that can allocate any register for the operand, and using these registers on load/store operations. If the register allocated by the compiler happens to be zero (r0), it might cause an invalid memory address access, since load and store operations consider the content of 0x0 address if the base register is r0, instead of the content of the r0 register. For example: r1 := 0xdeadbeef r0 := 0xdeadbeef ld r2, 0(1) /* will load into r2 the content of r1 address */ ld r2, 0(0) /* will load into r2 the content of 0x0 */ In order to avoid this possible problem, the inline assembly constraint should be aware that these registers will be used as a base register, thus, r0 should not be allocated. Other than that, this patch removes inline assembly operands that are not used by the tests. Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * Merge branch 'fixes' into nextMichael Ellerman2018-11-251-3/+18
| |\ | | | | | | | | | This contains a few must have fixes, like the stack alignment one.
* | \ Merge branch 'perf-core-for-linus' of ↵Linus Torvalds2018-12-26198-921/+35589
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "The main changes in this cycle on the kernel side: - rework kprobes blacklist handling (Masami Hiramatsu) - misc cleanups on the tooling side these areas were the main focus: - 'perf trace' enhancements (Arnaldo Carvalho de Melo) - 'perf bench' enhancements (Davidlohr Bueso) - 'perf record' enhancements (Alexey Budankov) - 'perf annotate' enhancements (Jin Yao) - 'perf top' enhancements (Jiri Olsa) - Intel hw tracing enhancements (Adrian Hunter) - ARM hw tracing enhancements (Leo Yan, Mathieu Poirier) - ... plus lots of other enhancements, cleanups and fixes" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (171 commits) tools uapi asm: Update asm-generic/unistd.h copy perf symbols: Relax checks on perf-PID.map ownership perf trace: Wire up the fadvise 'advice' table generator perf beauty: Add generator for fadvise64's 'advice' arg constants tools headers uapi: Grab a copy of fadvise.h perf beauty mmap: Print mmap's 'offset' arg in hexadecimal perf beauty mmap: Print PROT_READ before PROT_EXEC to match strace output perf trace beauty: Beautify arch_prctl()'s arguments perf trace: When showing string prefixes show prefix + ??? for unknown entries perf trace: Move strarrays to beauty.h for further reuse perf beauty: Wire up the x86_arch prctl code table generator perf beauty: Add a string table generator for x86's 'arch_prctl' codes tools include arch: Grab a copy of x86's prctl.h perf trace: Show NULL when syscall pointer args are 0 perf trace: Enclose the errno strings with () perf augmented_raw_syscalls: Copy 'access' arg as well perf trace: Add alignment spaces after the closing parens perf trace beauty: Print O_RDONLY when (flags & O_ACCMODE) == 0 perf trace: Allow asking for not suppressing common string prefixes perf trace: Add a prefix member to the strarray class ...
| * | | tools uapi asm: Update asm-generic/unistd.h copyArnaldo Carvalho de Melo2018-12-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To get the change in: b7d624ab4312 ("asm-generic: unistd.h: fixup broken macro include.") That doesn't imply in any changes in the tools. This silences the following perf build warning: Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/unistd.h' differs from latest version at 'include/uapi/asm-generic/unistd.h' diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Guo Ren <ren_guo@c-sky.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-2e7xwm5i2qcc88jp2lyawdyd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf symbols: Relax checks on perf-PID.map ownershipArnaldo Carvalho de Melo2018-12-181-11/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Those are simple enough, and usually not produced by root, instead by whatever user is running java, rust, Node.js JIT code that end up generating those /tmp/perf-PID.map for resolution of symbols in the anonymous executable maps. Having to use --force to resolve symbols in 'perf top' is a distraction, as recently I experienced when node.js symbols were not being resolved by 'perf top'. Acked-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Hítalo Silva <hitalos@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/n/tip-tk2jgo2v4v2yjuj28axbpppo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Wire up the fadvise 'advice' table generatorArnaldo Carvalho de Melo2018-12-181-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | That ends up generating this: $ cat /tmp/build/perf/trace/beauty/generated/fadvise_advice_array.c static const char *fadvise_advices[] = { [0] = "NORMAL", [1] = "RANDOM", [2] = "SEQUENTIAL", [3] = "WILLNEED", [4] = "DONTNEED", [5] = "NOREUSE", }; $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zwbslubagram8a8zdc003u8h@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf beauty: Add generator for fadvise64's 'advice' arg constantsArnaldo Carvalho de Melo2018-12-181-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ tools/perf/trace/beauty/fadvise.sh static const char *fadvise_advices[] = { [0] = "NORMAL", [1] = "RANDOM", [2] = "SEQUENTIAL", [3] = "WILLNEED", [4] = "DONTNEED", [5] = "NOREUSE", }; $ This has a hack wrt the s390 difference. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-tb7jguv01u8p570piq13eioh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | tools headers uapi: Grab a copy of fadvise.hArnaldo Carvalho de Melo2018-12-182-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Will be used to generate the string table for fadvise64's 'advice' argument. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-muswpnft8q9krktv052yrgsc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf beauty mmap: Print mmap's 'offset' arg in hexadecimalArnaldo Carvalho de Melo2018-12-181-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also to make it match 'strace' output, for regression testing. Both now produce this option, when 'perf trace' uses a .perfconfig asking for the strace like output: mmap(0x7faf66e6a000, 1363968, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7faf66e6a000 Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-27qhouo1kaac2iyl85nfnsf5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf beauty mmap: Print PROT_READ before PROT_EXEC to match strace outputArnaldo Carvalho de Melo2018-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Helps with comparing 'strace' and 'perf trace' output, for mutual regression testing. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-va0qe95xbhep5hy52aq5qe0v@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace beauty: Beautify arch_prctl()'s argumentsArnaldo Carvalho de Melo2018-12-184-1/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This actually so far, AFAIK is available only in x86, so the code was put in place with x86 prefixes, in arches where it is not available it will just not be called, so no further mechanisms are needed at this time. Later, when other arches wire this up, we'll just look at the uname (live sessions) or perf_env data in the perf.data header to auto-wire the right beautifier. With this the output is the same as produced by 'strace' when used with the following ~/.perfconfig: # cat ~/.perfconfig [llvm] dump-obj = true [trace] add_events = /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o show_zeros = yes show_duration = no no_inherit = yes show_timestamp = no show_arg_names = no args_alignment = -40 show_prefix = yes # And, on fedora 29, since the string tables are generated from the kernel sources, we don't know about 0x3001, just like strace: --- /tmp/strace 2018-12-17 11:22:08.707586721 -0300 +++ /tmp/trace 2018-12-18 11:11:32.037512729 -0300 @@ -1,49 +1,49 @@ -arch_prctl(0x3001 /* ARCH_??? */, 0x7ffc8a92dc80) = -1 EINVAL (Invalid argument) +arch_prctl(0x3001 /* ARCH_??? */, 0x7ffe4eb93ae0) = -1 EINVAL (Invalid argument) -arch_prctl(ARCH_SET_FS, 0x7faf6700f540) = 0 +arch_prctl(ARCH_SET_FS, 0x7fb507364540) = 0 And that seems to be related to the CET/Shadow Stack feature, that userland in Fedora 29 (glibc 2.28) are querying the kernel about, that 0x3001 seems to be ARCH_CET_STATUS, I'll check the situation and test with a fedora 29 kernel to see if the other codes are used. A diff that ignores the different pointers for different runs needs to be put in place in the upcoming regression tests comparing 'perf trace's output to strace's. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-73a9prs8ktkrt97trtdmdjs8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: When showing string prefixes show prefix + ??? for unknown entriesArnaldo Carvalho de Melo2018-12-181-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To match 'strace' output, like in: arch_prctl(0x3001 /* ARCH_??? */, 0x7ffc8a92dc80) = -1 EINVAL (Invalid argument) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-kx59j2dk5l1x04ou57mt99ck@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Move strarrays to beauty.h for further reuseArnaldo Carvalho de Melo2018-12-182-16/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'll use it in the upcoming arch_prctl() 'code' arg beautifier. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-6e4tj2fjen8qa73gy4u49vav@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf beauty: Wire up the x86_arch prctl code table generatorArnaldo Carvalho de Melo2018-12-181-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ cat /tmp/build/perf/trace/beauty/generated/x86_arch_prctl_code_array.c #define x86_arch_prctl_codes_1_offset 0x1001 static const char *x86_arch_prctl_codes_1[] = { [0x1001 - 0x1001]= "SET_GS", [0x1002 - 0x1001]= "SET_FS", [0x1003 - 0x1001]= "GET_FS", [0x1004 - 0x1001]= "GET_GS", [0x1011 - 0x1001]= "GET_CPUID", [0x1012 - 0x1001]= "SET_CPUID", }; #define x86_arch_prctl_codes_2_offset 0x2001 static const char *x86_arch_prctl_codes_2[] = { [0x2001 - 0x2001]= "MAP_VDSO_X32", [0x2002 - 0x2001]= "MAP_VDSO_32", [0x2003 - 0x2001]= "MAP_VDSO_64", }; $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-3r9blij6n8wdlsyd5dujx86r@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf beauty: Add a string table generator for x86's 'arch_prctl' codesArnaldo Carvalho de Melo2018-12-181-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ tools/perf/trace/beauty/x86_arch_prctl.sh #define x86_arch_prctl_codes_1_offset 0x1001 static const char *x86_arch_prctl_codes_1[] = { [0x1001 - 0x1001]= "SET_GS", [0x1002 - 0x1001]= "SET_FS", [0x1003 - 0x1001]= "GET_FS", [0x1004 - 0x1001]= "GET_GS", [0x1011 - 0x1001]= "GET_CPUID", [0x1012 - 0x1001]= "SET_CPUID", }; #define x86_arch_prctl_codes_2_offset 0x2001 static const char *x86_arch_prctl_codes_2[] = { [0x2001 - 0x2001]= "MAP_VDSO_X32", [0x2002 - 0x2001]= "MAP_VDSO_32", [0x2003 - 0x2001]= "MAP_VDSO_64", }; $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-w0fux1psivphhx6rve8kn3vq@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | tools include arch: Grab a copy of x86's prctl.hArnaldo Carvalho de Melo2018-12-182-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need it to generate the tables for the 'code' arch_prctl's syscall argument. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-vu890pi18fpd4eyz61cazckj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Show NULL when syscall pointer args are 0Arnaldo Carvalho de Melo2018-12-182-16/+15Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Matching strace's output format. The 'format' file for the syscall tracepoints have an indication if the arg is a pointer, with some exceptions like 'mmap' that has its first arg as an 'unsigned long', so use a heuristic using the argument name, i.e. if it contains the 'addr' substring, format it with the pointer formatter. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-ddghemr8qrm6i0sb8awznbze@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Enclose the errno strings with ()Arnaldo Carvalho de Melo2018-12-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To match strace, now both emit the same line for calls like: access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-krxl6klsqc9qyktoaxyih942@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf augmented_raw_syscalls: Copy 'access' arg as wellArnaldo Carvalho de Melo2018-12-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This will all come from userspace, but to test the changes to make 'perf trace' output similar to strace's, do this one more now manually. To update the precompiled augmented_raw_syscalls.o binary I just run: # perf record -e ~acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c sleep 1 LLVM: dumping /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.022 MB perf.data ] # Because to have augmented_raw_syscalls to be always used and a fast startup and remove the need to have the llvm toolchain installed, I'm using: # perf config | grep add_events trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # So when doing changes to augmented_raw_syscals.c one needs to rebuild the .o file. This will be done automagically later, i.e. have a 'make' behaviour of recompiling when the .c gets changed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-lw3i2atyq8549fpqwmszn3qp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Add alignment spaces after the closing parensArnaldo Carvalho de Melo2018-12-181-11/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To use strace's style, helping in comparing the output of 'perf trace' with the one from 'strace', to help in upcoming regression tests. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-mw6peotz4n84rga0fk78buff@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace beauty: Print O_RDONLY when (flags & O_ACCMODE) == 0Arnaldo Carvalho de Melo2018-12-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | And there are more flags, to match strace's output. openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 Also to help with regression tests. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-ofovpmvdli3bwch30936xn7t@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow asking for not suppressing common string prefixesArnaldo Carvalho de Melo2018-12-1828-86/+142
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far we've been suppressing common stuff such as "MAP_" in the mmap flags, showing "SHARED" instead of "MAP_SHARED", allow for those prefixes (and a few suffixes) to be shown: # trace -e *map,open*,*seek sleep 1 openat("/etc/ld.so.cache", CLOEXEC) = 3 mmap(0, 109093, READ, PRIVATE, 3, 0) = 0x7ff61c695000 openat("/lib64/libc.so.6", CLOEXEC) = 3 lseek(3, 792, SET) = 792 mmap(0, 8192, READ|WRITE, PRIVATE|ANONYMOUS) = 0x7ff61c693000 lseek(3, 792, SET) = 792 lseek(3, 864, SET) = 864 mmap(0, 1857568, READ, PRIVATE|DENYWRITE, 3, 0) = 0x7ff61c4cd000 mmap(0x7ff61c4ef000, 1363968, EXEC|READ, PRIVATE|FIXED|DENYWRITE, 3, 139264) = 0x7ff61c4ef000 mmap(0x7ff61c63c000, 311296, READ, PRIVATE|FIXED|DENYWRITE, 3, 1503232) = 0x7ff61c63c000 mmap(0x7ff61c689000, 24576, READ|WRITE, PRIVATE|FIXED|DENYWRITE, 3, 1814528) = 0x7ff61c689000 mmap(0x7ff61c68f000, 14368, READ|WRITE, PRIVATE|FIXED|ANONYMOUS) = 0x7ff61c68f000 munmap(0x7ff61c695000, 109093) = 0 openat("/usr/lib/locale/locale-archive", CLOEXEC) = 3 mmap(0, 217749968, READ, PRIVATE, 3, 0) = 0x7ff60f523000 # # vim ~/.perfconfig # # perf config llvm.dump-obj=true trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no trace.no_inherit=yes trace.show_timestamp=no trace.show_arg_names=no trace.args_alignment=0 trace.string_quote=" trace.show_prefix=yes # # # trace -e *map,open*,*seek sleep 1 openat(AT_FDCWD, "/etc/ld.so.cache", O_CLOEXEC) = 3 mmap(0, 109093, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7ebbe59000 openat(AT_FDCWD, "/lib64/libc.so.6", O_CLOEXEC) = 3 lseek(3, 792, SEEK_SET) = 792 mmap(0, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f7ebbe57000 lseek(3, 792, SEEK_SET) = 792 lseek(3, 864, SEEK_SET) = 864 mmap(0, 1857568, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebbc91000 mmap(0x7f7ebbcb3000, 1363968, PROT_EXEC|PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 139264) = 0x7f7ebbcb3000 mmap(0x7f7ebbe00000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1503232) = 0x7f7ebbe00000 mmap(0x7f7ebbe4d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1814528) = 0x7f7ebbe4d000 mmap(0x7f7ebbe53000, 14368, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS) = 0x7f7ebbe53000 munmap(0x7f7ebbe59000, 109093) = 0 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_CLOEXEC) = 3 mmap(0, 217749968, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7eaece7000 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-mtn1i4rjowjl72trtnbmvjd4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Add a prefix member to the strarray classArnaldo Carvalho de Melo2018-12-1812-31/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So that the user, in an upcoming patch, can select printing it to get the full string as used in the source code, not one with a common prefix chopped off so as to make the output more compact. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zypczc88gzbmeqx7b372s138@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Enclose strings with double quotesArnaldo Carvalho de Melo2018-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To match 'strace' output, helping with upcoming regression tests comparing both outputs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-jab52t1dcuh6vlztqle9g7u9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Make the alignment of the syscall args be configurableArnaldo Carvalho de Melo2018-12-182-3/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the start 'perf trace' aligns the parens enclosing the list of syscall args to align the syscall results, allow this to be configurable, keeping the default of 70. Using: # perf config llvm.dump-obj=true trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no trace.no_inherit=yes trace.show_timestamp=no trace.show_arg_names=no trace.args_alignment=0 # trace -e open*,close,*sleep sleep 1 openat(CWD, /etc/ld.so.cache, CLOEXEC) = 3 close(3) = 0 openat(CWD, /lib64/libc.so.6, CLOEXEC) = 3 close(3) = 0 openat(CWD, /usr/lib/locale/locale-archive, CLOEXEC) = 3 close(3) = 0 nanosleep(0x7ffc00de66f0, 0) = 0 close(1) = 0 close(2) = 0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-r8cbhoz1lr5npq9tutpvoigr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow suppressing the syscall argument namesArnaldo Carvalho de Melo2018-12-182-4/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To show just the values: Default: # trace -e open*,close,*sleep sleep 1 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 close(fd: 3 ) = 0 nanosleep(rqtp: 0x7ffc0c4ea0d0, rmtp: 0 ) = 0 close(fd: 1 ) = 0 close(fd: 2 ) = 0 # Remove it: # perf config trace.show_arg_names=no # trace -e open*,close,*sleep sleep 1 openat(CWD, /etc/ld.so.cache, CLOEXEC ) = 3 close(3 ) = 0 openat(CWD, /lib64/libc.so.6, CLOEXEC ) = 3 close(3 ) = 0 openat(CWD, /usr/lib/locale/locale-archive, CLOEXEC ) = 3 close(3 ) = 0 nanosleep(0x7ffced3a8c40, 0 ) = 0 close(1 ) = 0 close(2 ) = 0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-ta9tbdwgodpw719sr2bjm8eb@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow configuring if the syscall start timestamp should be printedArnaldo Carvalho de Melo2018-12-182-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | # trace -e open*,close,*sleep sleep 1 0.000 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 0.016 close(fd: 3 ) = 0 0.024 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 0.074 close(fd: 3 ) = 0 0.235 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 0.251 close(fd: 3 ) = 0 0.285 nanosleep(rqtp: 0x7ffd68e6d620, rmtp: 0 ) = 0 1000.386 close(fd: 1 ) = 0 1000.395 close(fd: 2 ) = 0 # # perf config trace.show_timestamp=no # trace -e open*,close,*sleep sleep 1 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: , flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 nanosleep(rqtp: 0x7fffa79c38e0, rmtp: 0 ) = 0 close(fd: 1 ) = 0 close(fd: 2 ) = 0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-mjjnicy48367jah6ls4k0nk8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow configuring default for perf_event_attr.inheritArnaldo Carvalho de Melo2018-12-182-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I.f. if children should inherit the parent perf_event configuration, i.e. if we should trace children as well or just the parent. The default is to follow children, to disable this and have a behaviour similar to strace, set this config option or use the --no_inherit 'perf trace' option. E.g.: Default: # perf config trace.no_inherit # trace -e clone,*sleep time sleep 1 0.000 time/21107 clone(clone_flags: CHILD_CLEARTID|CHILD_SETTID|0x11, newsp: 0, child_tidptr: 0x7f7b8f9ae810) = 21108 (time) ? time/21108 ... [continued]: clone() 0.691 sleep/21108 nanosleep(rqtp: 0x7ffed01d0540, rmtp: 0 ) = 0 0.00user 0.00system 0:01.00elapsed 0%CPU (0avgtext+0avgdata 1988maxresident)k 0inputs+0outputs (0major+76minor)pagefaults 0swaps # Disable it: # trace -e clone,*sleep time sleep 1 0.000 clone(clone_flags: CHILD_CLEARTID|CHILD_SETTID|0x11, newsp: 0, child_tidptr: 0x7ff41e100810) = 21414 (time) 0.00user 0.00system 0:01.00elapsed 0%CPU (0avgtext+0avgdata 1964maxresident)k 0inputs+0outputs (0major+76minor)pagefaults 0swaps # Notice that since there is just one thread, the "comm/TID" column is suppressed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-thd8s16pagyza71ufi5vjlan@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf config: Show the configuration when no arguments are providedArnaldo Carvalho de Melo2018-12-181-4/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | More convenient thah having to recall what letter is about showing/listing/dumping the configuration, i.e. no arguments means -l/--list: # perf config llvm.dump-obj=true trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no # perf config -l llvm.dump-obj=true trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no # perf config -h Usage: perf config [<file-option>] [options] [section.name[=value] ...] -l, --list show current config variables --system use system config file --user use user config file # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Taeung Song <treeze.taeung@gmail.com> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-z2n63avz6tliqb5gmu4l1dti@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow configuring if the syscall duration should be printedArnaldo Carvalho de Melo2018-12-182-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | # perf config trace.show_duration=no # perf config -l | grep trace trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=true trace.show_duration=no # trace -e *sleep sleep 1 0.000 sleep/8729 nanosleep(rqtp: 0x7ffcb0b4c940, rmtp: 0) = 0 # perf config trace.show_duration=yes # trace -e *sleep sleep 1 0.000 (1000.212 ms): sleep/8735 nanosleep(rqtp: 0x7ffca15fa770, rmtp: 0) = 0 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-2c7h1m8fhzb9puxtj9nlevi8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow configuring if zeroed syscall args should be printedArnaldo Carvalho de Melo2018-12-182-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The default so far, since we show argument names followed by its values, was to make the output more compact by suppressing most zeroed args. Make this configurable so that users can choose what best suit their needs. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-q0gxws02ygodh94o0hzim5xd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Allow specifying a set of events to add in perfconfigArnaldo Carvalho de Melo2018-12-182-0/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To add augmented_raw_syscalls to the events speficied by the user, or be the only one if no events were specified by the user, one can add this to perfconfig: # cat ~/.perfconfig [trace] add_events = /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # I.e. pre-compile the augmented_raw_syscalls.c BPF program and make it always load, this way: # perf trace -e open* cat /etc/passwd > /dev/null 0.000 ( 0.013 ms): cat/31557 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC) = 3 0.035 ( 0.007 ms): cat/31557 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC) = 3 0.353 ( 0.009 ms): cat/31557 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 0.424 ( 0.006 ms): cat/31557 openat(dfd: CWD, filename: /etc/passwd) = 3 # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-0lgj7vh64hg3ce44gsmvj7ud@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf augmented_raw_syscalls: Do not include stdio.hArnaldo Carvalho de Melo2018-12-181-1/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're not using that puts() thing, and thus we don't need to define the __bpf_stdout__ map, reducing the setup time. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-3452xgatncpil7v22minkwbo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Generate branch sample for exception packetLeo Yan2018-12-183-8/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The exception packet appears as one element with 'elem_type' == OCSD_GEN_TRC_ELEM_EXCEPTION or OCSD_GEN_TRC_ELEM_EXCEPTION_RET, which is present for exception entry and exit respectively. The decoder sets the packet fields 'packet->exc' and 'packet->exc_ret' to indicate the exception packets; but exception packets don't have a dedicated sample type and shares the same sample type CS_ETM_RANGE with normal instruction packets. As a result, the exception packets are taken as normal instruction packets and this introduces confusion in mixing different packet types. Furthermore, these instruction range packets will be processed for branch samples only when 'packet->last_instr_taken_branch' is true, otherwise they will be omitted, this can introduce a mess for exception and exception returning due to not having the complete address range info for context switching. To process exception packets properly, this patch introduces two new sample types: CS_ETM_EXCEPTION and CS_ETM_EXCEPTION_RET; these two types of packets will be handled by cs_etm__exception(). The function cs_etm__exception() forces setting the previous CS_ETM_RANGE packet flag 'prev_packet->last_instr_taken_branch' to true, this matches well with the program flow when the exception is trapped from user space to kernel space, no matter if the most recent flow has branch taken or not; this is also safe for returning to user space after exception handling. After exception packets have their own sample type, the packet fields 'packet->exc' and 'packet->exc_ret' aren't needed anymore, so remove them. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-9-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Treat EO_TRACE element as trace discontinuityLeo Yan2018-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the decoder outputs an EO_TRACE element, it means the end of the trace buffer; this is a discontinuity and in this case the end of trace data needs to be saved. This patch generates a CS_ETM_DISCONTINUITY packet for the EO_TRACE element hereby flushing the end of trace data in cs-etm.c. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-8-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Treat NO_SYNC element as trace discontinuityLeo Yan2018-12-181-1/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CoreSight tracer driver might insert barrier packets between different buffers, thus the decoder can spot the boundaries based on the barrier packet; it is possible for the decoder to hit a barrier packet and emit a NO_SYNC element, then the decoder will find a periodic synchronisation point inside that next trace block that starts the trace again but does not have the TRACE_ON element as indicator - usually because this trace block has wrapped the buffer so we have lost the original point when the trace was enabled. In the first case it causes the insertion of a OCSD_GEN_TRC_ELEM_NO_SYNC in the middle of the tracing stream, but as we were not handling the NO_SYNC element properly this ends up making users miss the discontinuity indications. Though OCSD_GEN_TRC_ELEM_NO_SYNC is different from CS_ETM_TRACE_ON when output from the decoder, both indicate that the trace data is discontinuous; this patch treats OCSD_GEN_TRC_ELEM_NO_SYNC as a trace discontinuity and generates a CS_ETM_DISCONTINUITY packet for it, so cs-etm can handle the discontinuity for this case, finally it saves the last trace data for the previous trace block and restart samples for the new block. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight ml <coresight@lists.linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-7-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Rename CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITYLeo Yan2018-12-183-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TRACE_ON element is used at the beginning of trace, it also can be appeared in the middle of trace data to indicate discontinuity; for example, it's possible to see multiple TRACE_ON elements in the trace stream if the trace is being limited by address range filtering. Furthermore, except TRACE_ON element is for discontinuity, NO_SYNC and EO_TRACE also can be used to indicate discontinuity, though they are used for different scenarios for which the trace is interrupted. This patch renames sample type CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITY, firstly the new name describes more closely the purpose of the packet; secondly this is a preparation for other output elements which also cause the trace discontinuity thus they can share the same one packet type. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-6-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Refactor enumeration cs_etm_sample_typeLeo Yan2018-12-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The values in enumeration cs_etm_sample_type are defined with setting bit N for each packet type, this is not suggested in the usual case. This patch refactor cs_etm_sample_type by converting from bit shifting values to continuous numbers. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-5-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Remove unused 'trace_on' in cs_etm_decoderLeo Yan2018-12-181-3/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cs_etm_decoder::trace_on is being assigned when TRACE_ON or NO_SYNC element is coming, but it is never used hence it is redundant and can be removed. So let's remove 'trace_on' field from cs_etm_decoder struct. Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-4-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Avoid stale branch samples when flush packetLeo Yan2018-12-181-1/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At the end of trace buffer handling, function cs_etm__flush() is invoked to flush any remaining branch stack entries. As a side effect, it also generates branch sample, because the 'etmq->packet' doesn't contains any new coming packet but point to one stale packet after packets swapping, so it wrongly makes synthesize branch samples with stale packet info. We could review below detailed flow which causes issue: Packet1: start_addr=0xffff000008b1fbf0 end_addr=0xffff000008b1fbfc Packet2: start_addr=0xffff000008b1fb5c end_addr=0xffff000008b1fb6c step 1: cs_etm__sample(): sample: ip=(0xffff000008b1fbfc-4) addr=0xffff000008b1fb5c step 2: flush packet in cs_etm__run_decoder(): cs_etm__run_decoder() `-> err = cs_etm__flush(etmq, false); sample: ip=(0xffff000008b1fb6c-4) addr=0xffff000008b1fbf0 Packet1 and packet2 are two continuous packets, when packet2 is the new coming packet, cs_etm__sample() generates branch sample for these two packets and use [packet1::end_addr - 4 => packet2::start_addr] as branch jump flow, thus we can see the first generated branch sample in step 1. At the end of cs_etm__sample() it swaps packets so 'etm->prev_packet'= packet2 and 'etm->packet'=packet1, so far it's okay for branch sample. If packet2 is the last one packet in trace buffer, even there have no any new coming packet, cs_etm__run_decoder() invokes cs_etm__flush() to flush branch stack entries as expected, but it also generates branch samples by taking 'etm->packet' as a new coming packet, thus the branch jump flow is as [packet2::end_addr - 4 => packet1::start_addr]; this is the second sample which is generated in step 2. So actually the second sample is a stale sample and we should not generate it. This patch introduces a new function cs_etm__end_block(), at the end of trace block this function is invoked to only flush branch stack entries and thus can avoid to generate branch sample for stale packet. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-3-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf cs-etm: Correct packets swapping in cs_etm__flush()Leo Yan2018-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The structure cs_etm_queue uses 'prev_packet' to point to previous packet, this can be used to combine with new coming packet to generate samples. In function cs_etm__flush() it swaps packets only when the flag 'etm->synth_opts.last_branch' is true, this means that it will not swap packets if without option '--itrace=il' to generate last branch entries; thus for this case the 'prev_packet' doesn't point to the correct previous packet and the stale packet still will be used to generate sequential sample. Thus if dump trace with 'perf script' command we can see the incorrect flow with the stale packet's address info. This patch corrects packets swapping in cs_etm__flush(); except using the flag 'etm->synth_opts.last_branch' it also checks the another flag 'etm->sample_branches', if any flag is true then it swaps packets so can save correct content to 'prev_packet'. Finally this can fix the wrong program flow dumping issue. The patch has a minor refactoring to use 'etm->synth_opts.last_branch' instead of 'etmq->etm->synth_opts.last_branch' for condition checking, this is consistent with that is done in cs_etm__sample(). Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Robert Walker <robert.walker@arm.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1544513908-16805-2-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Switch to using a struct for the aumented_raw_syscalls syscalls ↵Arnaldo Carvalho de Melo2018-12-181-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | map values We'll start adding more perf-syscall stuff, so lets do this prep step so that the next ones are just about adding more fields. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-vac4sn1ns1vj4y07lzj7y4b8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf augmented_syscalls: Switch to using a struct for the syscalls map valuesArnaldo Carvalho de Melo2018-12-181-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'll start adding more perf-syscall stuff, so lets do this prep step so that the next ones are just about adding more fields. Run it with the .c file once to cache the .o file: # trace --filter-pids 2834,2199 -e openat,augmented_raw_syscalls.c LLVM: dumping augmented_raw_syscalls.o 0.000 ( 0.021 ms): tmux: server/4952 openat(dfd: CWD, filename: /proc/5691/cmdline ) = 11 349.807 ( 0.040 ms): DNS Res~er #39/11082 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 44 4988.759 ( 0.052 ms): gsd-color/2431 openat(dfd: CWD, filename: /etc/localtime ) = 18 4988.976 ( 0.029 ms): gsd-color/2431 openat(dfd: CWD, filename: /etc/localtime ) = 18 ^C[root@quaco bpf]# From now on, we can use just the newly built .o file, skipping the compilation step for a faster startup: # trace --filter-pids 2834,2199 -e openat,augmented_raw_syscalls.o 0.000 ( 0.046 ms): DNS Res~er #39/11088 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 44 1946.408 ( 0.190 ms): systemd/1 openat(dfd: CWD, filename: /proc/1071/cgroup, flags: CLOEXEC ) = 20 1946.792 ( 0.215 ms): systemd/1 openat(dfd: CWD, filename: /proc/954/cgroup, flags: CLOEXEC ) = 20 ^C# Now on to do the same in the builtin-trace.c side of things. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-k8mwu04l8es29rje5loq9vg7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf bpf: Move perf_event_output() from stdio.h to bpf.hArnaldo Carvalho de Melo2018-12-182-3/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So that we don't always carry that __bpf_output__ map, leaving that to the scripts wanting to use that facility. 'perf trace' will be changed to look if that map is present and only setup the bpf-output events if so. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-azwys8irxqx9053vpajr0k5h@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| * | | perf trace: Implement syscall filtering in augmented_syscallsArnaldo Carvalho de Melo2018-12-182-1/+91
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Just another map, this time an BPF_MAP_TYPE_ARRAY, stating with one bool per syscall, stating if it should be filtered or not. So, with a pre-built augmented_raw_syscalls.o file, we use: # perf trace -e open*,augmented_raw_syscalls.o 0.000 ( 0.016 ms): DNS Res~er #37/29652 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 138 187.039 ( 0.048 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC ) = 11 187.348 ( 0.041 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 188.793 ( 0.036 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 189.803 ( 0.029 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 190.774 ( 0.027 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 284.620 ( 0.149 ms): DataStorage/3076 openat(dfd: CWD, filename: /home/acme/.mozilla/firefox/ina67tev.default/SiteSecurityServiceState.txt, flags: CREAT|TRUNC|WRONLY, mode: IRUGO|IWUSR|IWGRP) = 167 ^C# What is it that this gsd-housekeeping thingy needs to open /proc/self/mountinfo four times periodically? :-) This map will be extended to tell per-syscall parameters, i.e. how many bytes to copy per arg, using the function signature to get the types and then the size of those types, via BTF. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-cy222g9ucvnym3raqvxp0hpg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-09 14:25:18 +0200