summaryrefslogtreecommitdiffstats
path: root/tools
Commit message (Collapse)AuthorAgeFilesLines
* perf tools: Unify debug messages mechanismsArnaldo Carvalho de Melo2009-10-2317-116/+114Star
| | | | | | | | | | | | | | | We were using eprintf in some places, that looks at a global 'verbose' level, and at other places passing a 'v' parameter to specify the verbosity level, unify it by introducing pr_{err,warning,debug,etc}, just like in the kernel. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1256153646-10097-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Drop asm/types.h wrapperFrederic Weisbecker2009-10-235-19/+15Star
| | | | | | | | | | | | | | | | | | | | | | | | | Wrapping the kernel headers is dangerous when it comes to arch headers. Once we wrap asm/types.h, it will also replace the glibc asm/types.h, not only the kernel one. This results in build errors on some machines. Drop this wrapper and do its work from linux/types.h wrapper, also the glibc asm/types.h can already handle most of the type definition it was doing (typedef __u64, __u32, etc...). Todo: Check the others asm/*.h wrappers to prevent from other conflicts. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Anton Blanchard <anton@samba.org> LKML-Reference: <1256246604-17156-3-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Bind callchains to the first sort dimension columnFrederic Weisbecker2009-10-235-24/+99
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the callchains are displayed using a constant left margin. So depending on the current sort dimension configuration, callchains may appear to be well attached to the first sort dimension column field which is mostly the case, except when the first dimension of sorting is done by comm, because these are right aligned. This patch binds the callchain to the first letter in the first column, whatever type of column it is (dso, comm, symbol). Before: 0.80% perf [k] __lock_acquire __lock_acquire lock_acquire | |--58.33%-- _spin_lock | | | |--28.57%-- inotify_should_send_event | | fsnotify | | __fsnotify_parent After: 0.80% perf [k] __lock_acquire __lock_acquire lock_acquire | |--58.33%-- _spin_lock | | | |--28.57%-- inotify_should_send_event | | fsnotify | | __fsnotify_parent Also, for clarity, we don't put anymore the callchain as is but: - If we have a top level ancestor in the callchain, start it with a first ascii hook. Before: 0.80% perf [kernel] [k] __lock_acquire __lock_acquire lock_acquire | |--58.33%-- _spin_lock | | | |--28.57%-- inotify_should_send_event | | fsnotify [..] [..] After: 0.80% perf [kernel] [k] __lock_acquire | --- __lock_acquire lock_acquire | |--58.33%-- _spin_lock | | | |--28.57%-- inotify_should_send_event | | fsnotify [..] [..] - Otherwise, if we have several top level ancestors, then display these like we did before: 1.69% Xorg | |--21.21%-- vread_hpet | 0x7fffd85b46fc | 0x7fffd85b494d | 0x7f4fafb4e54d | |--15.15%-- exaOffscreenAlloc | |--9.09%-- I830WaitLpRing Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Anton Blanchard <anton@samba.org> LKML-Reference: <1256246604-17156-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Fix missing top level callchainFrederic Weisbecker2009-10-233-10/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While recursively printing the branches of each callchains, we forget to display the root. It is never printed. Say we have: symbol f1 f2 | -------- f3 | f4 | ---------f5 f6 Actually we never see that, instead it displays: symbol | --------- f3 | f4 | --------- f5 f6 However f1 is always the same than "symbol" and if we are sorting by symbols first then "symbol", f1 and f2 will be well aligned like in the above example, so displaying f1 looks redundant here. But if we are sorting by something else first (dso, comm, etc...), displaying f1 doesn't look redundant but rather necessary because the symbol is not well aligned anymore with its callchain: comm dso symbol f1 f2 | --------- [...] And we want the callchain to be obvious. So we fix the bug by printing the root branch, but we also filter its first entry if we are sorting by symbols first. Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1256246604-17156-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Use strsep() over strtok_r() for parsing single lineSteven Rostedt2009-10-211-3/+6
| | | | | | | | | | | | | | | | | | | | | The second argument in the strtok_r() function is not to be used generically and can have different implementations. Currently the function parsing of the perf trace code uses the second argument to copy data from. This can crash the tool or just have unpredictable results. The correct solution is to use strsep() which has a defined result. I also added a check to see if the result was correct, and will break out of the loop in case it fails to parse as expected. Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091020232034.237814877@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Add 'make DEBUG=1' to remove the -O6 cflagSteven Rostedt2009-10-211-1/+8
| | | | | | | | | | | | | | | When using gdb to debug perf, it is practically impossible to use when perf is compiled with -O6. For developers, this patch adds the DEBUG feature to the make command line so that a developer can easily remove the optimization flag. LKML-Reference: <1255590330.8392.446.camel@twins> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091020232033.984323261@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf top: Fix symbol annotationArnaldo Carvalho de Melo2009-10-201-3/+4
| | | | | | | | | | | | | | We need to use map->unmap_ip() here too to match section relative symbol address to the absolute address needed to match objdump -dS addresses. Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1256061295-19835-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf annotate: Remove requirement of passing a symbol nameArnaldo Carvalho de Melo2009-10-201-9/+2Star
| | | | | | | | | | | | | | | | | | | | If the user doesn't pass a symbol name to annotate, it will annotate all the symbols that have hits, in order, just like 'perf report -s comm,dso,symbol'. This is a natural followup patch to the one that uses output_hists to find the symbols with hits. The common case is to annotate the first few entries at the top of a perf report, so lets type less characters. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1256058509-19678-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf annotate: Use the sym_priv_size area for the histogramArnaldo Carvalho de Melo2009-10-207-83/+132
| | | | | | | | | | | | | | | | We have this sym_priv_size mechanism for attaching private areas to struct symbol entries but annotate wasn't using it, adding private areas to struct symbol in addition to a ->priv pointer. Scrap all that and use the sym_priv_size mechanism. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1256055940-19511-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf tools: Add ->unmap_ip operation to struct mapArnaldo Carvalho de Melo2009-10-204-26/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We need this because we get section relative addresses when reading the symtabs, but when a tool like 'perf annotate' needs to match these address to what 'objdump -dS' produces we need the address + section back again. So in annotate now we look at the 'struct hist_entry' instances (that weren't really being used) so that we iterate only over the symbols that had some hit and get the map where that particular hit happened so that we can get the right address to match with annotate. Verified that at least: perf annotate mmap_read_counter # Uses the ~/bin/perf binary perf annotate --vmlinux /home/acme/git/build/perf/vmlinux intel_pmu_enable_all on a 'perf record perf top' session seems to work. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1255979877-12533-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf timechart: Add a process filterArjan van de Ven2009-10-202-4/+106
| | | | | | | | | | | | | | | | | | | | | During the Kernel Summit demo of perf/ftrace/timechart, there was a feature request to have a process filter for timechart so that you can zoom into one or a few processes that you are really interested in. This patch adds basic support for this feature, the -p (--process) option now can select a PID or a process name to be shown. Multiple -p options are allowed, and the combined set will be included in the output. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091020070939.7d0fb8a7@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'perf/urgent' into perf/coreIngo Molnar2009-10-204-4/+30
|\ | | | | | | | | | | Merge reason: Queue up dependent patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf timechart: Improve the visual appearance of scheduler delaysArjan van de Ven2009-10-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [from KS feedback] Currently, scheduler delays are shown in a mostly transparent, light yellow color. This color is rather hard to see on several screens, especially projectors. This patch changes the color of the scheduler delays to be a much more "hard" yellow that survived the kernel summit projector. Reported-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091020064731.20ae126a@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf timechart: Fix the wakeup-arrows that point to non-visible processesArjan van de Ven2009-10-201-2/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The timechart wakeup arrows currently show no process information when the waker/wakee are processes that are not actually chosen to be shown on the timechart. This patch fixes this oversight, by looking through all processes (after giving preference to visible processes) as well as falling back to just showing the PID if no name for the process can be resolved. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091020064649.0e4959b2@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf top: Fix --delay_secs 0 division by zeroTim Blechmann2009-10-191-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add delay_secs sanity check to handle_keypress, this fixes a division by zero crash. Signed-off-by: Tim Blechmann <tim@klingt.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4AD9EBFD.106@klingt.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf tools: Bump version to 0.0.2Ingo Molnar2009-10-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | We released the first version of perf with 0.0.1 in v2.6.31, time to double our version number to 0.0.2 ;-) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Add bunch of missing headers to LIB_HArnaldo Carvalho de Melo2009-10-201-0/+17
| | | | | | | | | | | | | | | | | | | | Build dependencies were not properly mapped out. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1255973491-11626-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Add missing tools/perf/util/include/string.hArnaldo Carvalho de Melo2009-10-202-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To cure a bunch of: In file included from util/include/linux/bitmap.h:1, from util/header.h:8, from builtin-trace.c:7: util/include/../../../../include/linux/bitmap.h:8:26: error: linux/string.h: No such file or directory make: *** [builtin-trace.o] Error 1 make: *** Waiting for unfinished jobs.... Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1255972296-11500-1-git-send-email-acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf stat: Count branches firstIngo Molnar2009-10-191-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Count branches first, cache-misses second. The reason is that on x86 branches are not counted by all counters on all CPUs. Before: Performance counter stats for 'ls': 0.756653 task-clock-msecs # 0.802 CPUs 0 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 250 page-faults # 0.330 M/sec 2375725 cycles # 3139.781 M/sec 1628129 instructions # 0.685 IPC 19643 cache-references # 25.960 M/sec 4608 cache-misses # 6.090 M/sec 342532 branches # 452.694 M/sec <not counted> branch-misses 0.000943356 seconds time elapsed After: Performance counter stats for 'ls': 1.056734 task-clock-msecs # 0.859 CPUs 0 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 259 page-faults # 0.245 M/sec 3345932 cycles # 3166.295 M/sec 3074090 instructions # 0.919 IPC 616928 branches # 583.806 M/sec 39279 branch-misses # 6.367 % 21312 cache-references # 20.168 M/sec 3661 cache-misses # 3.464 M/sec 0.001230551 seconds time elapsed (also prettify the printout of branch misses, in case it's getting scaled.) Cc: Tim Blechmann <tim@klingt.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4ADC3975.8050109@klingt.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- tools/perf/builtin-stat.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c373683..95a55ea 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -59,6 +59,8 @@ static struct perf_event_attr default_attrs[] = { { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS}, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, }; --- tools/perf/builtin-stat.c | 20 ++++++++++---------- 1 files changed, 10 insertions(+), 10 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 95a55ea..90e0a26 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -50,17 +50,17 @@ static struct perf_event_attr default_attrs[] = { - { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, - { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES}, - { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, - { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, - - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS}, - { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, + { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, + + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, };
* | perf stat: Re-align the default_attrs[] arrayIngo Molnar2009-10-191-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up the array definition to be vertically aligned. No functional effects. Cc: Tim Blechmann <tim@klingt.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4ADC3975.8050109@klingt.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- tools/perf/builtin-stat.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c373683..95a55ea 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -59,6 +59,8 @@ static struct perf_event_attr default_attrs[] = { { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES}, { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES }, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS}, + { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, };
* | perf stat: Add branch performance events to default outputTim Blechmann2009-10-191-0/+2
| | | | | | | | | | | | | | | | | | | | | | Adds performance event information about branches and branch misses to the default output of perf stat. Signed-off-by: Tim Blechmann <tim@klingt.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4ADC3975.8050109@klingt.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Display better error messages on missing packagesRandy Dunlap2009-10-191-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check for libelf headers and glibc headers separately so that the error message correctly identifies which package installation is missing/needed. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: paulus@samba.org Cc: a.p.zijlstra@chello.nl Cc: efault@gmx.de Cc: fweisbec@gmail.com Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <4ADBCCE8.3060300@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Use DECLARE_BITMAP instead of an open-coded arrayFrederic Weisbecker2009-10-194-22/+20Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use DECLARE_BITMAP instead of an open coded array for our bitmap of featured sections. This makes the array an unsigned long instead of a u64 but since we use a 256 bits bitmap, the array size shouldn't vary between different boxes. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1255795038-13751-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Introduce bitmask'ed additional headersFrederic Weisbecker2009-10-193-56/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This provides a new set of bitmasked headers. A new field is added in the perf headers that implements a bitmap storing optional features present in the perf.data file. The layout can be pictured like this: (Usual perf headers)(Features bitmap)[Feature 0][Feature n][Feature 255] If the bit n is set, then the feature n is used in this file. They are all set in order. This brings a backward and forward compatibility. The trace_info section has moved into such optional features, this is the first and only one for now. This is backward compatible with the .32 file version although it doesn't support the previous separate trace.info file. And finally it doesn't support the current interim development version. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1255792354-11304-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Use kernel bitmap libraryFrederic Weisbecker2009-10-1914-5/+156
| | | | | | | | | | | | | | | | | | | | | | | | | | Use the kernel bitmap library for internal perf tools uses. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1255792354-11304-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf stat: Add branch performance metricAnton Blanchard2009-10-191-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we count both branches and branch-misses it is useful to print out the percentage of branch-misses: # perf stat -e branches -e branch-misses /bin/true Performance counter stats for '/bin/true': 401684 branches # 0.000 M/sec 23301 branch-misses # 5.801 % Signed-off-by: Anton Blanchard <anton@samba.org> Cc: paulus@samba.org Cc: a.p.zijlstra@chello.nl LKML-Reference: <20091018112923.GQ4808@kryten> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Move dereference after NULL testJulia Lawall2009-10-174-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In each case, if the NULL test on thread is needed, then the dereference should be after the NULL test. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> LKML-Reference: <Pine.LNX.4.64.0910170842500.9213@ask.diku.dk> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf trace: Add filter SuppportLi Zefan2009-10-153-3/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new option "--filter <filter_str>" to perf record, and it should be right after "-e trace_point": #./perf record -R -f -e irq:irq_handler_entry --filter irq==18 ^C # ./perf trace perf-4303 ... irq_handler_entry: irq=18 handler=eth0 init-0 ... irq_handler_entry: irq=18 handler=eth0 init-0 ... irq_handler_entry: irq=18 handler=eth0 init-0 ... irq_handler_entry: irq=18 handler=eth0 init-0 ... irq_handler_entry: irq=18 handler=eth0 See Documentation/trace/events.txt for the syntax of filter expressions. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <4AD6955F.90602@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Remove all char * typecasts and use const in prototypeSteven Rostedt2009-10-151-61/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | The (char *) for all the static strings was a fix for the symptom and not the disease. The real issue was that the function prototypes needed to be declared "const char *". Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194400.635935008@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle - and + in parsing trace print formatSteven Rostedt2009-10-151-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The opterators '-' and '+' are not handled in the trace print format. To do: '++' and '--'. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194400.330843045@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Add latency format to trace outputSteven Rostedt2009-10-153-19/+114
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the irqs disabled, preemption count, need resched, and other info that is shown in the latency format of ftrace. # perf trace -l perf-16457 2..s2. 53636.260344: kmem_cache_free: call_site=ffffffff811198f perf-16457 2..s2. 53636.264330: kmem_cache_free: call_site=ffffffff811198f perf-16457 2d.s4. 53636.300006: kmem_cache_free: call_site=ffffffff810d889 Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194400.076588953@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle both versions of ftrace outputSteven Rostedt2009-10-151-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | The ftrace output events can have either arguments or no arguments. The parser needs to be able to handle both. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194359.790221427@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Fix bprintk reading in trace outputSteven Rostedt2009-10-151-8/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The bprintk parsing was broken in more ways than one. The file parsing was incorrect, and the words used by the arguments are always 4 bytes aligned, even on 64-bit machines. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194359.520931637@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Still continue on failed parsing of an eventSteven Rostedt2009-10-152-17/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Even though an event may fail to parse, we should not kill the entire report. The trace should still be able to show what it can. If an event fails to parse, a warning is printed, and the output continues. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194359.190809589@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle the case with and without the "signed" trace fieldSteven Rostedt2009-10-151-29/+52
| | | | | | | | | | | | | | | | | | | | | | | | The trace format files now have a "signed" field. But we should still be able to handle the kernels that do not have this field. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194358.888239553@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle newlines in trace parsing betterSteven Rostedt2009-10-151-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | New lines between args in the trace format can break the parsing. This should not be the case. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194358.637991808@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle * as typecast in trace parsingSteven Rostedt2009-10-151-28/+22Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The '*' is currently only treated as a multiplication, and it needs to be handled as a typecast pointer. This is the version used by trace-cmd. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194358.409327875@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle arrays in print fields for trace parsingSteven Rostedt2009-10-151-0/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The array used by the ftrace stack events (caller[x]) causes issues with the parser. This adds code to handle the case, but it also assumes that the array is of type long. Note, this is a special case used (currently) only by the ftrace user and kernel stack records. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194358.124833639@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle trace parsing of < and >Steven Rostedt2009-10-151-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | The code to handle the '<' and '>' ops was all in place, but they were not in the switch statement to consider them as valid ops. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194357.807434040@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Fix backslash processing on trace print formatsSteven Rostedt2009-10-151-2/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | The handling of backslashes was broken. It would stop parsing when encountering one. Also, '\n', '\t', '\r' and '\\' were not converted. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194357.521974680@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Handle print concatenations in event format fileSteven Rostedt2009-10-151-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | kmem_alloc ftrace event format had a string that was broken up by two tokens. "string 1" "string 2". This patch lets the parser be able to handle the concatenation. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091014194357.253818714@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'linus' into perf/coreIngo Molnar2009-10-154-14/+24
|\| | | | | | | | | | | Merge reason: pick up tools/perf/ changes from upstream. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf tools: Remove static debugfs path from parse-eventsAshwin Chaugule2009-10-121-1/+4
| | | | | | | | | | | | | | | | | | | | Timechart doesn't work if debugfs is not in /sys/kernel/debug/. Fixed by using global debugfs_path which is filled in by perf. Signed-off-by: Ashwin Chaugule <ashwinc@quicinc.com> Cc: "Arjan van de Ven" <arjan@linux.intel.com> LKML-Reference: <a751bdc6978478de6d10440e587a2cc7.squirrel@www.codeaurora.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf tools: Fix the NO_64BIT build on pure 64-bit systemsIngo Molnar2009-10-121-7/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Randy Dunlap reported that 'make NO_64BIT=1' fails to build a pure 32-b it binary on 64-bit/64-bit x86 systems. The reason is that we dont pass in the -m32 and GCC defaults to -m64. So pass it in - and also extend the warning message about libelf dependencies - glibc-dev[el] is needed as well beyond the libelf library. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: Message-Id: <20091005131729.78444bfb.randy.dunlap@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * perf tools: Fix const char type propagationRandy Dunlap2009-10-122-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following perf build warnings/errors in function argument types: builtin-sched.c:1894: warning: passing argument 1 of 'sort_dimension__add' discards qualifiers from pointer target type util/trace-event-parse.c:685: warning: passing argument 2 of 'read_expected' discards qualifiers from pointer target type util/trace-event-parse.c:741: warning: passing argument 4 of 'test_type_token' discards qualifiers from pointer target type util/trace-event-parse.c:706: warning: passing argument 2 of 'read_expected_item' discards qualifiers from pointer target type ... trigger because older GCC is not able to prove that sort_dimension__add() does not change the string. Some goes for test_type_token(). Fix this by improving type consistency. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20091005131729.78444bfb.randy.dunlap@oracle.com> [ Also remove ugly type cast now unnecessary. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Move threads & last_match to threads.cArnaldo Carvalho de Melo2009-10-136-84/+45Star
| | | | | | | | | | | | | | | | | | | | | | | | This was just being copy'n'pasted all over. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <20091013141629.GD21809@ghostprotocols.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Remove expensive old debug code from perf topMike Galbraith2009-10-131-14/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | Calling gettimeofday() at high frequency is painful for handicapped boxen. The spot calling gettimeofday() is old unneeded debug code, so remove it. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1255438640.7173.1.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Do not manually count string lengthsVincent Legoll2009-10-132-8/+13
| | | | | | | | | | | | | | | | | | | | Use strlen & macros instead of manually counting string lengths as this is error prone and may lend to bugs. Signed-off-by: Vincent Legoll <vincent.legoll@gmail.com> Cc: Linus Torvalds <torvalds@osdl.org> LKML-Reference: <4727185d0910130118m5387058dndb02ac9b384af9f0@mail.gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf sched: Add -C option to measure on a specific CPUMike Galbraith2009-10-121-1/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To refresh, trying to sched record only one CPU results in bogus latencies as below. I fixed^Wmade it stop doing the bad thing today, by following task migration events properly. Before: marge:/root/tmp # taskset -c 1 perf sched record -C 0 -- sleep 10 marge:/root/tmp # perf sched lat ----------------------------------------------------------------------------------------- Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | ----------------------------------------------------------------------------------------- Xorg:4943 | 1.290 ms | 1 | avg: 1670.132 ms | max: 1670.132 ms | hald-addon-stor:3569 | 0.091 ms | 3 | avg: 658.609 ms | max: 1975.797 ms | hald-addon-stor:3573 | 0.209 ms | 4 | avg: 499.138 ms | max: 1990.565 ms | audispd:4270 | 0.012 ms | 1 | avg: 0.015 ms | max: 0.015 ms | .... marge:/root/tmp # perf sched trace|grep 'Xorg:4943' swapper-0 [000] 401.184013288: sched_stat_runtime: task: Xorg:4943 runtime: 1233188 [ns], vruntime: 19105169779 [ns] rt2870TimerQHan-4947 [000] 402.854140127: sched_stat_wait: task: Xorg:4943 wait: 580073 [ns] rt2870TimerQHan-4947 [000] 402.854141770: sched_migrate_task: task Xorg:4943 [140] from: 1 to: 0 rt2870TimerQHan-4947 [000] 402.854143854: sched_stat_wait: task: Xorg:4943 wait: 0 [ns] rt2870TimerQHan-4947 [000] 402.854145397: sched_switch: task rt2870TimerQHan:4947 [140] (D) ==> Xorg:4943 [140] Xorg-4943 [000] 402.854193133: sched_stat_runtime: task: Xorg:4943 runtime: 56546 [ns], vruntime: 11766332500 [ns] Xorg-4943 [000] 402.854196842: sched_switch: task Xorg:4943 [140] (S) ==> swapper:0 [140] After: marge:/root/tmp # taskset -c 1 perf sched record -C 0 -- sleep 10 marge:/root/tmp # perf sched lat ----------------------------------------------------------------------------------------- Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | ----------------------------------------------------------------------------------------- amarokapp:11150 | 271.297 ms | 878 | avg: 0.130 ms | max: 1.057 ms | konsole:5965 | 1.370 ms | 12 | avg: 0.092 ms | max: 0.855 ms | Xorg:4943 | 179.980 ms | 1109 | avg: 0.087 ms | max: 1.206 ms | hald-addon-stor:3574 | 0.212 ms | 9 | avg: 0.040 ms | max: 0.169 ms | hald-addon-stor:3570 | 0.223 ms | 9 | avg: 0.037 ms | max: 0.223 ms | klauncher:5864 | 0.550 ms | 8 | avg: 0.032 ms | max: 0.048 ms | The 'Maximum delay ms' results are now sane. Signed-off-by: Mike Galbraith <efault@gmx.de> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf tools: Fix counter sample frequency breakageMike Galbraith2009-10-122-8/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 42e59d7d19dc4b4 switched to a default sample frequency of 1KHz, which overrides any user supplied count, causing sched, top and timechart to miss events due to their discrete events being flagged PERF_SAMPLE_PERIOD. Override default sample frequency when the user profides a period count, and make both record and top honor that user supplied option. Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@infradead.org> LKML-Reference: <1255326963.15107.2.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-12 22:07:30 +0200