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* torture: Prevent jitter from delaying build-only runsPaul E. McKenney2016-11-141-0/+5
| | | | | | | | | | | | | Currently, if the --jitter flag specifies jitter for a --build-only run, the system will obediently build a kernel, refuse to launch it, launch the requested number of jitter processes, and wait for the specified kernel run time, which defaults to 30 minutes. This is of course quite pointless. This commit therefore disables jitter on build-only runs. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Inflict default jitterPaul E. McKenney2016-06-151-1/+1
| | | | | | | This commit enables jitter by default. It may be manually disabled by passing "--jitter 0" to kvm.sh. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Drop "-soundhw pcspkr" from x86 boot argumentsPaul E. McKenney2016-06-151-1/+0Star
| | | | | | | | Because recent testing shows that "-soundhw pcspkr" is no longer required in the kernel boot arguments, this commit drops this qemu argument. Reported-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Don't specify the cpu type of QEMU on PPCBoqun Feng2016-06-151-1/+1
| | | | | | | | Do not restrict the cpu type to POWER7 for QEMU as we have POWER8 now. Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Make -soundhw a x86 specific optionBoqun Feng2016-06-152-4/+5
| | | | | | | | | | | | | The option "-soundhw pcspk" gives me a error on PPC as follow: qemu-system-ppc64: ISA bus not available for pcspk This means this option doesn't work on ppc by default. So simply make this an x86-specific option via identify_qemu_args(). Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Use vmlinux as the fallback kernel imageBoqun Feng2016-06-152-8/+7Star
| | | | | | | | | | | | | | | | | | The vmlinux image is available for all the architectures, and suitable for running a KVM guest by QEMU, besides, we used to copy the vmlinux to $resdir anyway. Therefore it makes sense to use it as the fallback kernel image for rcutorture KVM tests. This patch makes identify_boot_image() return vmlinux if ${TORTURE_BOOT_IMAGE} is not set on non-x86 architectures, also fixes several places that hard-code "bzImage" as $KERNEL. This also fixes a problem that PPC doesn't have a bzImage file as build results. Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Add starvation events to error summaryPaul E. McKenney2016-06-151-1/+6
| | | | | | | This commit adds a string of the form "Starves: 10" to the summary line for error conditions found in the console output. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Forgive lengthy trace dumps and preemptionPaul E. McKenney2016-06-151-2/+19
| | | | | | | | This commit avoids killing qemu if a trace dump is making progress or if console log output is continuing and the console log timestamp does not exceed the total plus grace period. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Don't rebuild identical kernelPaul E. McKenney2016-04-211-7/+19
| | | | | | | | | Currently, if the user specifies multiple runs of a given test configuration, the scripting does multiple kernel builds. This wastes both time and disk space, so this commit makes the scripting use the first build for all runs of a given test configuration. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Add OS-jitter capabilityPaul E. McKenney2016-04-212-0/+108
| | | | | | | This commit adds a --jitter OS-jitter capability to expose bugs based on no-delay assumptions. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Convert test duration to seconds earlyPaul E. McKenney2016-03-312-5/+4Star
| | | | | | | This commit converts test duration from minutes to seconds early on in order to prepare for upcoming OS-jitter-injection changes. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Kill qemu, not parent processPaul E. McKenney2016-03-311-6/+24
| | | | | | | | | | | The current hang-check machinery in the rcutorture scripts uses "$!" of a parenthesized bash statement to capture the pid. Unfortunately, this captures not qemu's pid, but rather that of its parent that implements the parenthesized statement. This commit therefore adjusts things so as to capture qemu's actual pid, which then allows the script to actually kill qemu in event of a kernel hang. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Make scripts analyze rcuperf trace data, if presentPaul E. McKenney2016-03-312-0/+129
| | | | | | | | | The rcuperf event-trace data is more accurate than are the rcuperf printk()s because locking keeps things ordered. This commit therefore parses and analyzes this event-trace data if present, and falls back on the printk()s otherwise. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Print measure of batching efficiencyPaul E. McKenney2016-03-311-10/+16
| | | | | | | | This commit adds a line giving the number of grace periods, the number of batches, and the ratio. The larger the ratio, the greater the batching efficiency. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Update scripting to accommodate rcuperfPaul E. McKenney2016-03-313-2/+87
| | | | | | | This commit adds the scripting changes to add support for the shiny new rcuperf kernel module. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Check for self-detected stallsPaul E. McKenney2016-01-261-2/+2
| | | | | | | | The current scripts parse console output only for cases where one CPU detect a stall on some other CPU or task. This commit therefore adds checks for self-detected stalls. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Don't keep empty console.log.diags filesPaul E. McKenney2016-01-261-0/+2
| | | | | | | | | Currently, an error-free run produces an empty console.log.diags file. This can be annoying when using "vi */console.log.diags" to see a full summary of the errors. This commit therefore removes any empty files during the analysis process. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Add checks for rcutorture writer starvationPaul E. McKenney2016-01-261-2/+2
| | | | | | | This commit adds checks for rcutorture writer starvation, so that instances will be added to the test summary. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Place console.log files correctly from the get-goPaul E. McKenney2015-12-061-3/+2Star
| | | | | | | | | | | | | | Currently, the console output files ("console.log") are placed in the build directory initially, then copied to the results directory. One problem with this is if a qemu refuses to die in a timely fashion after a kernel hang, it will continue to write after the next qemu starts up, resulting in confusing output from the old instance of qemu. This commit prevents such confusion by placing the console.log files into the results directory to begin with, so that a given instance of qemu is always writing only to its own console.log file. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Abbreviate console error dumpPaul E. McKenney2015-12-061-6/+35
| | | | | | | | | | | | | Currently, the scripts print a list of warning/bug indicators from the console.log file. This works well if there are only a few warnings or bugs, but can be quite annoying if there is a large number. This commit therefore prints a summary listing the number of each type of warning/bug indicator, but only if there is at least one such indicator. The full list is stored in the results directory at console.log.diags, which makes it easier to find the warning/bugs in the full console.log. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Default grace period to three minutes, allow overridePaul E. McKenney2015-12-062-3/+8
| | | | | | | | | | The default test grace period of two minutes is insufficient in some cases and excessive in others. This commit therefore increases the default to three minutes, but also adds a --shutdown-grace parameter to allow the default to be overridden. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Add batch number to script printoutPaul E. McKenney2015-12-061-6/+9
| | | | | | | | | | | | Currently, the scripts print "----Start batch" at the beginning of each batch, which does serve as a good visual delimiter between batches. Unfortunately, if there are a lot of batches, it is hard to quickly estimate test runtime from the output of "--dryrun sched". This commit therefore adds a batch number, so that the beginning-of-batch output looks like this "----Start batch 10" for the tenth batch. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Forgive non-plural argumentsPaul E. McKenney2015-10-061-3/+3
| | | | | | | | | This commit allows --bootarg instead of --bootargs, --config instead of --configs, and --qemu-arg instead of --qemu-args. For those cases where a native English speaker might auto-correct the argument to be incorrect. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Allow repetition factors in Kconfig-fragment listsPaul E. McKenney2015-05-271-6/+19
| | | | | | | | | | | | Although it is currently possible to run the same test in parallel, '--config "TINY01 TINY01 TINY01"' can get a bit verbose, especially if you want to run 48 instances of TINY01 in parallel. This commit therefore allows prefixing the Kconfig fragment with a repeat count, for example, '--config "48*TINY01"' to run 48 instances in parallel. At least assuming that you have 48 CPUs and also gave '--cpus 48'. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* rcutorture: Display "make oldconfig" errorsPaul E. McKenney2015-05-272-1/+5
| | | | | | | | The current rcutorture scripting fails to dump out errors from "make oldconfig", so this commit addresses this issue. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Avoid script syntax error when insufficient CPUsPaul E. McKenney2015-03-031-1/+1
| | | | | | | Parentheses are special to bash, so use an overflow flag that doesn't use them. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
*-. Merge branches 'doc.2015.01.07a', 'fixes.2015.01.15a', ↵Paul E. McKenney2015-01-165-13/+38
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.16a' and 'torture.2015.01.11a' into HEAD doc.2015.01.07a: Documentation updates. fixes.2015.01.15a: Miscellaneous fixes. preempt.2015.01.06a: Changes to handling of lists of preempted tasks. srcu.2015.01.06a: SRCU updates. stall.2015.01.16a: RCU CPU stall-warning updates and fixes. torture.2015.01.11a: RCU torture-test updates and fixes.
| | * torture: Flag console.log file to prevent holdovers from earlier runsPaul E. McKenney2015-01-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A system misconfiguration that prevents qemu from running at all (for example, a missing dynamically linked library) will keep the console.log file from the previous run. This can fool the developer into thinking that this failed run actually completed correctly. This commit therefore overwrites the console.log file just before launching qemu. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | * torture: Add "-enable-kvm -soundhw pcspk" to qemu command linePaul E. McKenney2015-01-111-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | More recent qemu implementations really want "-enable-kvm", and the "-soundhw pcspk" makes the script a bit less dependent on odd audio libraries being installed. This commit therefore adds both to the default qemu command line. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | * rcutorture: Handle different mpstat versionsPaul E. McKenney2015-01-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The mpstat command recently added the %gnice column, which messes up the cpu2use.sh script's idle-CPU calculations. This commit therefore uses $NF instead of $12 to select the last (%idle) column. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | * rcutorture: Make build-output parsing correctly flag RCU's warningsPaul E. McKenney2015-01-111-7/+13
| | | | | | | | | | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| | * rcutorture: Issue warnings on close calls due to Reader Batch blowsPaul E. McKenney2015-01-111-0/+18
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Normal rcutorture checking overestimates grace periods somewhat due to the fact that there is a delay from a grace-period request until the start of the corresponding grace period and another delay from the end of that grace period to notification of the requestor. This means that rcutorture's detection of RCU bugs is less sensitive than it might be. It turns out that rcutorture also checks the underlying grace-period "completed" counter (displayed in Reader Batch output), which in theory allows rcutorture to do exact checks. In practice, memory misordering (by both compiler and CPU) can result in false positives. However, experience on x86 shows that these false positives are quite rare, occurring less than one time per 1,000 hours of testing. This commit therefore does the exact checking, giving a warning if any Reader Batch blows happen, and flagging an error if they happen more often than once every three hours in long tests. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| * rcutorture: Add checks for stall ending before dump startPaul E. McKenney2015-01-061-1/+1
|/ | | | | | | | The current rcutorture scripting checks for actual stalls (via the "Call Trace:" check), but fails to spot the case where a stall ends just as it is being detected. This commit therefore adds a check for this case. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Remove obsolete kversion param in kvm.shPranith Kumar2014-11-042-15/+6Star
| | | | | | | | | Now that we have removed configs based on kernel version, we can also remove the kversion parameter in kvm.sh. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Run Linux-kernel binary out of results directoryPaul E. McKenney2014-11-041-2/+2
| | | | | | | | | | | | The rcutorture scripts create a qemu-cmd script containing the actual qemu command. However, this command references the build directory, which will be overwritten by later builds. This commit therefore runs the kernel out of the results directory so that less hand-editing is required to re-run a previous test. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Check for nul bytes in console outputPaul E. McKenney2014-09-081-0/+4
| | | | | | | | | | | | When starting a new torture run while an old one is still running, both qemu processes can be outputting to the same console.out file. This can cause quite a bit of confusion, so this commit checks for this situation, which is normally indicated by nul bytes in the console output. Yes, if your new run uses up an exact number of blocks of the file, this check will be ineffective, but the odds are not bad. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* torture: Print PID in hung-kernel diagnostic messagePaul E. McKenney2014-09-081-1/+1
| | | | | Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* rcutorture: Specify MAXSMP=y for TREE01Paul E. McKenney2014-09-083-1/+24
| | | | | | | | | | | | Setting CONFIG_MAXSMP=y causes cpumasks to be moved offstack, which introduces the possibility of NULL cpumask_var_t pointers. This commit therefore enables CONFIG_MAXSMP=y in TREE01 to increase test coverage. However, because CONFIG_MAXSMP=y implies 8192 CPUs, we need to use the maxcpus= boot parameter to limit the number of CPUs to something reasonable, which in turn requires updating the scripts to handle this. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
* rcutorture: Set executable bit and drop bash from UsagePranith Kumar2014-09-0812-15/+12Star
| | | | | | | | | | This commit sets the executable bit on test scripts config2frag.sh and kvm.sh. Since #!/bin/bash is set in all the scripts, this commit also drops it from all usage lines because the scripts can now all be invoked directly. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Use bash shell for all the test scriptsPranith Kumar2014-09-0812-18/+18
| | | | | | | | | | | | Some of the scripts encode a default /bin/sh shell. On systems which use dash as default shell, these scripts fail as they are bash scripts. I encountered this while testing the sprintf() changes on a Debian system where dash is the default shell. This commit changes all such uses to use bash explicitly. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Clean up diagnostics from --buildonly runsPaul E. McKenney2014-06-263-12/+25
| | | | | | | | | Currently the post-processing complains about the lack of rcutorture output when --buildonly is set and also emits misleading messages about kernels being started and finishing. This commit suppresses these complaints and messages. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Enable versions without CFcommon to function correctlyPaul E. McKenney2014-06-261-0/+1
| | | | | | | | | The CFcommon file must now be present, which makes using the current scripts against old kernel versions cumbersome. This commit therefore makes the CFcommon file be optional, so that old kernel versions can be used with current torture scripts. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* rcutorture: Note diffs from git commitsPaul E. McKenney2014-05-141-0/+4
| | | | | | | | | | | The current scripting only keeps track of the git SHA-1 of the current HEAD. This can cause confusion in cases where testing ran in a git tree where changes had not yet been checked in. This commit therefore also records the output of "git diff HEAD" to provide the information needed to reconstruct the source tree that was tested. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Use elapsed time to detect hangsPaul E. McKenney2014-05-141-6/+12
| | | | | | | | | | The kvm-test-1-run.sh currently counts "sleep 1" commands to detect hangs. This can fail spectacularly on busy systems, where "sleep 1" might take far longer than one second to complete. This commit therefore changes hang detection to use elapsed time measurements. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Better summary diagnostics for build failuresPaul E. McKenney2014-05-144-8/+21
| | | | | | | | | | | | The reaction of kvm-recheck.sh is obscure at best, and easy to miss completely. This commit therefore prints "BUG: Build failed" in the summary at the end of a run. This commit also adds the line of dashes in cases where performance info is not available, and also avoids printing nonsense diagnostics in cases where some of the normal test output is not available. In addition, this commit saves off the .config file even when the build fails. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Choose bzImage location based on architecturePaul E. McKenney2014-05-143-6/+43
| | | | | | | | | | | | | | | | Currently, the scripts hard-code arch/x86/boot/bzImage, which does not work well for other architectures. This commit therefore provides a identify_boot_image function that selects the correct bzImage location relative to the top of the Linux source tree. This commit also adds a --bootimage argument that allows selecting some other file, for example, "vmlinux". This change requires that the definition of the QEMU variable be computed earlier in order to identify where to look for the boot image when it comes time to copy it to the results directory. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Permit multi-word qemu and boot argumentsPaul E. McKenney2014-05-141-2/+2
| | | | | | | | This commit applies quotes to permit multi-word --qemu-args and --bootargs arguments. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* torture: Report diagnostics from qemuPaul E. McKenney2014-05-141-1/+8
| | | | | | | | | | | The current script does record qemu diagnostics, but the user has to know where to look for them. This commit therefore puts them into the Warnings file so that kvm-recheck.sh will display them. This change is especially useful if you are in the habit of killing the qemu process when you realize that you messed something up, but then later on wonder why the process terminated early. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* torture: Make "--dryrun script" use same environment as normal runPaul E. McKenney2014-05-141-15/+11Star
| | | | | | | | | | | | | | | In a normal torture-test run, the script inherits its environment variables, but this does not work when producing a script that is to run later. Therefore, definitions and exports are prepended to a dryrun script but not to a script that is run immediately. This commit reconciles this by placing definitions and exports at the beginning of the script in both cases. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Conflicts: tools/testing/selftests/rcutorture/bin/kvm.sh
* torture: Make "--dryrun script" output self-sufficientPaul E. McKenney2014-05-141-33/+27Star
| | | | | | | | | | The scripts produced by kvm.sh's "--dryrun script" argument were intended for debugging rather than to run, but it is easier to debug if the script output matches exactly what is run. This commit therefore makes this script runnable. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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