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2017-01-18perf unwind: Fix looking up dwarf unwind stack infoMatija Glavinic Pecotic
Using perf with call graph method dwarf fails to provide backtrace support for stripped binary even though .gnu_debuglink points to *.dbg flavor with properly populated debug symbols. Problem is reproduced on ARM (v7, v8), kernels 3.14.y, 4.4.y and 4.10.rc3. Perf is configured with libunwind, and unwind dwarf support [1]. Test code (stress_bt.c) can be found on [2]. Running (explicitly disable other unwinding methods): $ gcc -g -o stress_bt -fomit-frame-pointer -fno-unwind-tables \ -fno-asynchronous-unwind-tables stress_bt.c $ perf record -N --call-graph dwarf ./stress_bt $ perf report results in properly generated call graph. Stripping the binary and running it results with missing call graph. Expected result is to have call graph: $ gcc -g -o stress_bt -fomit-frame-pointer -fno-unwind-tables \ -fno-asynchronous-unwind-tables stress_bt.c $ objcopy --only-keep-debug stress_bt stress_bt.dbg $ objcopy --strip-debug stress_bt $ objcopy --add-gnu-debuglink=stress_bt.dbg stress_bt $ perf record -N --call-graph dwarf ./stress_bt $ perf report Problem is that perf doesn't try to read symbols pointed by gnu debuglink. Patch adds checking, and reading of the symbols from debuglink and symsrc. Order of the check is to first check within dso, then check whether symsrc is defined and try to read from it. Finally, debuglink is checked. Default locations of debug files are discussed in [3] and [4]. Comments on RFC are on [5]. [1] https://wiki.linaro.org/LEG/Engineering/TOOLS/perf-callstack-unwinding [2] [1]#Backtrace_stress_application [3] https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html [4] https://sourceware.org/binutils/docs/binutils/objcopy.html [5] https://lkml.org/lkml/2016/8/22/473 Signed-off-by: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/d309d40a-463f-482b-68e1-1465326efdc1@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-18selftest/powerpc: Wrong PMC initialized in pmc56_overflow testMadhavan Srinivasan
Test uses PMC2 to count the event. But PMC1 is being initialized. Patch to fix it. Fixes: 3752e453f6ba ('selftests/powerpc: Add tests of PMU EBBs') Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-01-17bpf: Fix test_lru_sanity5() in test_lru_map.cMartin KaFai Lau
test_lru_sanity5() fails when the number of online cpus is fewer than the number of possible cpus. It can be reproduced with qemu by using cmd args "--smp cpus=2,maxcpus=8". The problem is the loop in test_lru_sanity5() is testing 'i' which is incorrect. This patch: 1. Make sched_next_online() always return -1 if it cannot find a next cpu to schedule the process. 2. In test_lru_sanity5(), the parent process does sched_setaffinity() first (through sched_next_online()) and the forked process will inherit it according to the 'man sched_setaffinity'. Fixes: 5db58faf989f ("bpf: Add tests for the LRU bpf_htab") Reported-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2017-01-17Merge tag 'perf-urgent-for-mingo-4.10-20170117' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull 'perf probe' fixes from Arnaldo Carvalho de Melo <acme@redhat.com> - Show correct locations for 'perf probe' on modules (Masami Hiramatsu) - Correctly handle 'perf probe's on GCC generated functions in modules (Masami Hiramatsu) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-17perf evlist: Fix typo in deliver_sample()Soramichi AKIYAMA
This patch fixes a typo: s/delievery/delivery/ Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170117222233.dfd92de0ad701e7c53396950@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf tools: Move two variables usied in libperf from perf.cSoramichi AKIYAMA
The use_browser and perf_version_string variables are both declared in perf.c but they are also referenced by other functions of libperf.a. Therefore a user linking an own main() with libperf.a must declare those two variables in their files even if the files never use the browser or the version information. This patch fixes this issue by moving use_browser and perf_version_string out of perf.c to some other files. Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170117002237.c1aec0ce3b4d675dca018deb@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Show total wait times for summaryNamhyung Kim
When --state option is given, the summary will show total run, sleep, iowait, preempt and delay time instead of statistics of runtime. $ perf sched timehist -s --state Wait-time summary comm parent sched-in run-time sleep iowait preempt delay (count) (msec) (msec) (msec) (msec) (msec) --------------------------------------------------------------------- systemd[1] 0 3 0.497 1.685 0.000 0.000 0.061 ksoftirqd/0[3] 2 21 0.434 989.948 0.000 0.000 0.325 rcu_preempt[7] 2 28 0.386 993.211 0.000 0.000 0.712 migration/0[10] 2 12 0.126 50.174 0.000 0.000 0.044 watchdog/0[11] 2 1 0.009 0.000 0.000 0.000 0.016 migration/1[13] 2 2 0.029 11.755 0.000 0.000 0.007 <SNIP> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Add --state optionNamhyung Kim
The --state option is to show task state when switched out. The state is printed as a single character like in the /proc but I added 'I' for idle state rather than 'R'. $ perf sched timehist --state | head Samples do not have callchains. time cpu task name wait time sch delay run time state [tid/pid] (msec) (msec) (msec) -------- --- ----------------------- -------- ------------------ ----- 1.753791 [3] <idle> 0.000 0.000 0.000 I 1.753834 [1] perf[27469] 0.000 0.000 0.000 S 1.753904 [3] perf[27470] 0.000 0.006 0.112 S 1.753914 [1] <idle> 0.000 0.000 0.079 I 1.753915 [3] migration/3[23] 0.000 0.002 0.011 S 1.754287 [2] <idle> 0.000 0.000 0.000 I 1.754335 [2] transmission[1773/1739] 0.000 0.004 0.047 S Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-17perf sched timehist: Account thread wait time separatelyNamhyung Kim
Separate thread wait time into 3 parts - sleep, iowait and preempt based on the prev_state of the last event. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113104523.31212-1-namhyung@kernel.org [ Fix the build on centos:5 where 'wait' shadows a global declaration ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16x86/cpufeature: Add AVX512_VPOPCNTDQ featurePiotr Luc
Vector population count instructions for dwords and qwords are going to be available in future Intel Xeon & Xeon Phi processors. Bit 14 of CPUID[level:0x07, ECX] indicates that the instructions are supported by a processor. The specification can be found in the Intel Software Developer Manual (SDM) and in the Instruction Set Extensions Programming Reference (ISE). Populate the feature bit and clear it when xsave is disabled. Signed-off-by: Piotr Luc <piotr.luc@intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: kvm@vger.kernel.org Cc: Radim Krčmář <rkrcmar@redhat.com> Link: http://lkml.kernel.org/r/20170110173403.6010-2-piotr.luc@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-01-16perf probe: Fix to probe on gcc generated functions in modulesMasami Hiramatsu
Fix to probe on gcc generated functions on modules. Since probing on a module is based on its symbol name, it should be adjusted on actual symbols. E.g. without this fix, perf probe shows probe definition on non-exist symbol as below. $ perf probe -m build-x86_64/net/netfilter/nf_nat.ko -F in_range* in_range.isra.12 $ perf probe -m build-x86_64/net/netfilter/nf_nat.ko -D in_range p:probe/in_range nf_nat:in_range+0 With this fix, perf probe correctly shows a probe on gcc-generated symbol. $ perf probe -m build-x86_64/net/netfilter/nf_nat.ko -D in_range p:probe/in_range nf_nat:in_range.isra.12+0 This also fixes same problem on online module as below. $ perf probe -m i915 -D assert_plane p:probe/assert_plane i915:assert_plane.constprop.134+0 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148411450673.9978.14905987549651656075.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf probe: Add error checks to offline probe post-processingMasami Hiramatsu
Add error check codes on post processing and improve it for offline probe events as: - post processing fails if no matched symbol found in map(-ENOENT) or strdup() failed(-ENOMEM). - Even if the symbol name is the same, it updates symbol address and offset. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148411443738.9978.4617979132625405545.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf probe: Fix to show correct locations for events on modulesMasami Hiramatsu
Fix to show correct locations for events on modules by relocating given address instead of retrying after failure. This happens when the module text size is big enough, bigger than sh_addr, because the original code retries with given address + sh_addr if it failed to find CU DIE at the given address. Any address smaller than sh_addr always fails and it retries with the correct address, but addresses bigger than sh_addr will get a CU DIE which is on the given address (not adjusted by sh_addr). In my environment(x86-64), the sh_addr of ".text" section is 0x10030. Since i915 is a huge kernel module, we can see this issue as below. $ grep "[Tt] .*\[i915\]" /proc/kallsyms | sort | head -n1 ffffffffc0270000 t i915_switcheroo_can_switch [i915] ffffffffc0270000 + 0x10030 = ffffffffc0280030, so we'll check symbols cross this boundary. $ grep "[Tt] .*\[i915\]" /proc/kallsyms | grep -B1 ^ffffffffc028\ | head -n 2 ffffffffc027ff80 t haswell_init_clock_gating [i915] ffffffffc0280110 t valleyview_init_clock_gating [i915] So setup probes on both function and see what happen. $ sudo ./perf probe -m i915 -a haswell_init_clock_gating \ -a valleyview_init_clock_gating Added new events: probe:haswell_init_clock_gating (on haswell_init_clock_gating in i915) probe:valleyview_init_clock_gating (on valleyview_init_clock_gating in i915) You can now use it in all perf tools, such as: perf record -e probe:valleyview_init_clock_gating -aR sleep 1 $ sudo ./perf probe -l probe:haswell_init_clock_gating (on haswell_init_clock_gating@gpu/drm/i915/intel_pm.c in i915) probe:valleyview_init_clock_gating (on i915_vga_set_decode:4@gpu/drm/i915/i915_drv.c in i915) As you can see, haswell_init_clock_gating is correctly shown, but valleyview_init_clock_gating is not. With this patch, both events are shown correctly. $ sudo ./perf probe -l probe:haswell_init_clock_gating (on haswell_init_clock_gating@gpu/drm/i915/intel_pm.c in i915) probe:valleyview_init_clock_gating (on valleyview_init_clock_gating@gpu/drm/i915/intel_pm.c in i915) Committer notes: In my case: # perf probe -m i915 -a haswell_init_clock_gating -a valleyview_init_clock_gating Added new events: probe:haswell_init_clock_gating (on haswell_init_clock_gating in i915) probe:valleyview_init_clock_gating (on valleyview_init_clock_gating in i915) You can now use it in all perf tools, such as: perf record -e probe:valleyview_init_clock_gating -aR sleep 1 # perf probe -l probe:haswell_init_clock_gating (on i915_getparam+432@gpu/drm/i915/i915_drv.c in i915) probe:valleyview_init_clock_gating (on __i915_printk+240@gpu/drm/i915/i915_drv.c in i915) # # readelf -SW /lib/modules/4.9.0+/build/vmlinux | egrep -w '.text|Name' [Nr] Name Type Address Off Size ES Flg Lk Inf Al [ 1] .text PROGBITS ffffffff81000000 200000 822fd3 00 AX 0 0 4096 # So both are b0rked, now with the fix: # perf probe -m i915 -a haswell_init_clock_gating -a valleyview_init_clock_gating Added new events: probe:haswell_init_clock_gating (on haswell_init_clock_gating in i915) probe:valleyview_init_clock_gating (on valleyview_init_clock_gating in i915) You can now use it in all perf tools, such as: perf record -e probe:valleyview_init_clock_gating -aR sleep 1 # perf probe -l probe:haswell_init_clock_gating (on haswell_init_clock_gating@gpu/drm/i915/intel_pm.c in i915) probe:valleyview_init_clock_gating (on valleyview_init_clock_gating@gpu/drm/i915/intel_pm.c in i915) # Both looks correct. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/148411436777.9978.1440275861947194930.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf script: Also allow forcing reading of non-root owned files by rootYannick Brosseau
In 2059fc7a5a9e ("perf symbols: Allow forcing reading of non-root owned files by root") 'perf report' was added the option of forcing reading of non-root owned symbol file. This add the same behavior for perf script. Reported-by: Mark Drayton <mbd@fb.com> Signed-off-by: Yannick Brosseau <scientist@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: kernel-team@fb.com Link: http://lkml.kernel.org/r/20170113182527.18625-1-scientist@fb.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf script: Fix man page about --dump-raw-trace optionMichael Petlan
The "--dump-raw-script" is not a valid option, replace it with the valid one, "--dump-raw-trace" Signed-off-by: Michael Petlan <mpetlan@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 133dc4c39c57 ("perf: Rename 'perf trace' to 'perf script'") LPU-Reference: 728644547.14560155.1484320012612.JavaMail.zimbra@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16tools lib subcmd: Fix missing member nameSoramichi AKIYAMA
This patch adds missing member names to struct initializations. Although in C99 for struct S {int x, int y} two init codes struct S s = {.x = (a), (b)} and struct S s = {.x = (a), .y = (b)} are the same, it is better to explicitly write .y (.argh in this patch) for readability and robustness against language/compiler evolutions. Signed-off-by: Soramichi Akiyama <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170113215623.32fb1ac2d862af0048c30fe6@m.soramichi.jp Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf tools: Remove unneccessary feature-dwarf warningDavid Carrillo-Cisneros
Don't warn for feature-dwarf==0 if user explicitily disabled DWARF by using NO_DWARF=1. Signed-off-by: David Carrillo-Cisneros <davidcc@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20170112210159.76143-1-davidcc@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16perf pmu: Factor out scale conversion codeAndi Kleen
Move the scale factor parsing code to an own function to reuse it in an upcoming patch. v2: Return error in case strdup returns NULL. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20170103150833.6694-2-andi@firstfloor.org [ Keep returning -ENOMEM when strdup() fails in perf_pmu__parse_scale()/convert_scale() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-16Merge 4.10-rc4 into driver-core-nextGreg Kroah-Hartman
We want the sysfs file revert and other fixes in here as well for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-16Merge 4.10-rc4 into usb-nextGreg Kroah-Hartman
We need the USB fixes in here to make merges easier/possible with the other sub-maintainer USB trees. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-15Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Misc race fixes uncovered by fuzzing efforts, a Sparse fix, two PMU driver fixes, plus miscellanous tooling fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86: Reject non sampling events with precise_ip perf/x86/intel: Account interrupts for PEBS errors perf/core: Fix concurrent sys_perf_event_open() vs. 'move_group' race perf/core: Fix sys_perf_event_open() vs. hotplug perf/x86/intel: Use ULL constant to prevent undefined shift behaviour perf/x86/intel/uncore: Fix hardcoded socket 0 assumption in the Haswell init code perf/x86: Set pmu->module in Intel PMU modules perf probe: Fix to probe on gcc generated symbols for offline kernel perf probe: Fix --funcs to show correct symbols for offline module perf symbols: Robustify reading of build-id from sysfs perf tools: Install tools/lib/traceevent plugins with install-bin tools lib traceevent: Fix prev/next_prio for deadline tasks perf record: Fix --switch-output documentation and comment perf record: Make __record_options static tools lib subcmd: Add OPT_STRING_OPTARG_SET option perf probe: Fix to get correct modname from elf header samples/bpf trace_output_user: Remove duplicate sys/ioctl.h include samples/bpf sock_example: Avoid getting ethhdr from two includes perf sched timehist: Show total scheduling time
2017-01-14torture: Enable DEBUG_OBJECTS_RCU_HEAD for Tiny RCUPaul E. McKenney
The RCU torture tests currently do not run any Tiny RCU scenarios for CONFIG_DEBUG_OBJECTS_RCU_HEAD=y. This is a hole in the test, given that someone might need this in real life and given that Tiny RCU uses different callback-handling code than does Tree RCU. This commit therefore enables this Kconfig option for scenario TINY02. Reported-by: "Ahmed, Iftekhar" <ahmedi@oregonstate.edu> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Update RCU test scenario documentationPaul E. McKenney
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Run a couple scenarios with CONFIG_RCU_EQS_DEBUGPaul E. McKenney
This commit runs TREE04 and TREE08 with CONFIG_RCU_EQS_DEBUG=y, enabling dyntick-counter checking on those two tests. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Run one test with DEBUG_LOCK_ALLOC but not PROVE_LOCKINGPaul E. McKenney
This commit sets CONFIG_DEBUG_LOCK_ALLOC but not CONFIG_PROVE_LOCKING for TREE08 in order to have at least one test with this configuration. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Run at least one test with CONFIG_DEBUG_OBJECTS_RCU_HEADPaul E. McKenney
This commit enables the CONFIG_DEBUG_OBJECTS_RCU_HEAD Kconfig option in TREE02 in order to do at least some testing with this enabled. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Add tests without slow grace period setup/cleanupPaul E. McKenney
This commit moves CONFIG_RCU_TORTURE_TEST_SLOW_CLEANUP, CONFIG_RCU_TORTURE_TEST_SLOW_INIT, and CONFIG_RCU_TORTURE_TEST_SLOW_PREINIT from CFcommon to all of the TREE scenarios other than TREE08 and TREE09 in order to do at least some testing without these Kconfig options set. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Add CONFIG_PROVE_RCU_REPEATEDLY=y for TINY02Paul E. McKenney
This commit adds CONFIG_PROVE_RCU_REPEATEDLY=y, which has been untested for quite some time. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14torture: Add a check for CONFIG_RCU_STALL_COMMON for TINY01Paul E. McKenney
This commit verifies coverage of testing with CONFIG_RCU_STALL_COMMON=n. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
2017-01-14locking/ww_mutex: Add ww_mutex to tools/testing/selftestsChris Wilson
Add the minimal test running (modprobe test-ww_mutex) to the kselftests CI framework. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161201114711.28697-9-chris@chris-wilson.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-14locking/ww_mutex: Add ww_mutex to locktorture testChris Wilson
Although ww_mutexes degenerate into mutexes, it would be useful to torture the deadlock handling between multiple ww_mutexes in addition to torturing the regular mutexes. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Maarten Lankhorst <dev@mblankhorst.nl> Cc: Nicolai Hähnle <nhaehnle@gmail.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161201114711.28697-3-chris@chris-wilson.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-12tools: psock_lib: harden socket filter used by psock testsSowmini Varadhan
The filter added by sock_setfilter is intended to only permit packets matching the pattern set up by create_payload(), but we only check the ip_len, and a single test-character in the IP packet to ensure this condition. Harden the filter by adding additional constraints so that we only permit UDP/IPv4 packets that meet the ip_len and test-character requirements. Include the bpf_asm src as a comment, in case this needs to be enhanced in the future Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-12bpf: allow b/h/w/dw access for bpf's cb in ctxDaniel Borkmann
When structs are used to store temporary state in cb[] buffer that is used with programs and among tail calls, then the generated code will not always access the buffer in bpf_w chunks. We can ease programming of it and let this act more natural by allowing for aligned b/h/w/dw sized access for cb[] ctx member. Various test cases are attached as well for the selftest suite. Potentially, this can also be reused for other program types to pass data around. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-11tools: Sync x86's vmx.h with the kernelArnaldo Carvalho de Melo
To pick the changes from: 1b07304c587d ("KVM: nVMX: support descriptor table exits") That adds entries to VMX_EXIT_REASONS, that is used by tools/perf/arch/x86/util/kvm-stat.c. This also picks the changes in: 1dc35dacc16b ("KVM: nVMX: check host CR3 on vmentry and vmexit") But these are not used in 'perf kvm stat', do it just to silence the kernel/tools file cache coherency detector: $ make -C tools/perf make: Entering directory '/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: arch/x86/include/uapi/asm/vmx.h differs from kernel Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Ladi Prosek <lprosek@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-56uowkk8t5zje49a42asffcy@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output time option argumentJiri Olsa
It's now possible to specify the threshold time for perf.data like: $ perf record --switch-output=30s ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=30s ... [ perf record: dump data: Woken up 44 times ] [ perf record: Dump perf.data.2017010213043746 ] ... The time is expected to be a number with appended unit character - s/m/h/d. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output size warningJiri Olsa
Adding switch-output size warning if the requested size of lower than the wakeup ring buffer size. $ perf record --switch-output=1K ls WARNING: switch-output data size lower than wakeup kernel buffer size (258K) expect bigger perf.data sizes ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1483955520-29063-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add switch-output size option argumentJiri Olsa
It's now possible to specify the threshold size for perf.data like: $ perf record --switch-output=2G ... Once it's reached, the current data are dumped in to the perf.data.<timestamp> file and session does on. $ perf record --switch-output=2G ... [ perf record: dump data: Woken up 7244 times ] [ perf record: Dump perf.data.2017010214093746 ] ... The size is expected to be a number with appended unit character - B/K/M/G. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Change switch-output option to take optional argumentJiri Olsa
Next patches will add --switch-output option arguments, changing the option to allow that and adding its default value to 'signal'. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf record: Add struct switch_outputJiri Olsa
Next patches will add more --switch-output option arguments, so preparing the data holder. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Wang Nan <wangnan0@huawei.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1483955520-29063-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf tools: Add unit_number__scnprintf functionJiri Olsa
Add unit_number__scnprintf function to display size units and use it in -m option info message. Before: $ perf record -m 10M ls rounding mmap pages size to 16777216 bytes (4096 pages) ... After: $ perf record -m 10M ls rounding mmap pages size to 16M (4096 pages) ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1483955520-29063-2-git-send-email-jolsa@kernel.org [ Rename it to unit_number__scnprintf for consistency ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf evlist: Fix typo in perf_evlist__start_workload()Soramichi Akiyama
This patch fixes a typo: s/enable to/unable to/ Signed-off-by: Soramichi AKIYAMA <akiyama@m.soramichi.jp> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: bcf3145fbeb1 ("perf evlist: Enhance perf_evlist__start_workload()") Link: http://lkml.kernel.org/r/20170110200006.e1f7a766b4faf1f107ae2e1b@m.soramichi.jp [ Wasn't applying, fixed it up by hand, added Fixes: tag ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf trace: Allow specifying list of syscalls and events in -e/--expr/--eventArnaldo Carvalho de Melo
Makes it easier to specify both events and syscalls (to be formatter strace-like), i.e. previously one would have to do: # perf trace -e nanosleep --event sched:sched_switch usleep 1 Now it is possible to do: # perf trace -e nanosleep,sched:sched_switch usleep 1 0.000 ( 0.021 ms): usleep/17962 nanosleep(rqtp: 0x7ffdedd61ec0) ... 0.021 ( ): sched:sched_switch:usleep:17962 [120] S ==> swapper/1:0 [120]) 0.000 ( 0.066 ms): usleep/17962 ... [continued]: nanosleep()) = 0 # The old style --expr and using both -e and --event continues to work. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ieg6bakub4657l9e6afn85r4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf kallsyms: Introduce tool to look for extended symbol information on the ↵Arnaldo Carvalho de Melo
running kernel Its similar to doing grep on a /proc/kallsyms, but it also shows extra information like the path to the kernel module and the unrelocated addresses in it, to help in diagnosing problems. It is also helps demonstrate the use of the symbols routines so that tool writers can use them more effectively. Using it: $ perf kallsyms e1000_xmit_frame netif_rx usb_stor_set_xfer_buf e1000_xmit_frame: [e1000e] /lib/modules/4.9.0+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko 0xffffffffc046fc10-0xffffffffc0470bb0 (0x19c80-0x1ac20) netif_rx: [kernel] [kernel.kallsyms] 0xffffffff916f03a0-0xffffffff916f0410 (0xffffffff916f03a0-0xffffffff916f0410) usb_stor_set_xfer_buf: [usb_storage] /lib/modules/4.9.0+/kernel/drivers/usb/storage/usb-storage.ko 0xffffffffc057aea0-0xffffffffc057af19 (0xf10-0xf89) $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-79bk9pakujn4l4vq0f90klv3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf machine: Add a kallsyms loading constructorArnaldo Carvalho de Melo
To reduce the boilerplate for searching for functions in the running kernel and modules. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-93iqzayafpaxaguoiwjqezgz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11tools lib subcmd: Add missing linux/kernel.h include to subcmd.hArnaldo Carvalho de Melo
As it was getting the BUILD_BUG_ON_ZERO() definition by luck. Cc: Jiri Olsa <jolsa@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-dh71o31ar72ajck8o2x4aoae@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11perf jvmti: Create libdir directory before installing libperf-jvmti.soLaura Abbott
The install command for libperf-jvmti.so does not check if libdir exists before installing. This means that when the install command is run: install libperf-jvmti.so '/tmp/test_root/usr/lib64'; libperf-jvmti.so will get installed to /usr/lib64 as a file and break further installation. Fix this by ensuring the directory gets created first. See https://bugzilla.redhat.com/show_bug.cgi?id=1410296 Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: d4dfdf00d43e ("perf jvmti: Plug compilation into perf build") Link: http://lkml.kernel.org/r/1483741088-13543-1-git-send-email-labbott@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Two AF_* families adding entries to the lockdep tables at the same time. Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-11Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge fixes from Andrew Morton: "27 fixes. There are three patches that aren't actually fixes. They're simple function renamings which are nice-to-have in mainline as ongoing net development depends on them." * akpm: (27 commits) timerfd: export defines to userspace mm/hugetlb.c: fix reservation race when freeing surplus pages mm/slab.c: fix SLAB freelist randomization duplicate entries zram: support BDI_CAP_STABLE_WRITES zram: revalidate disk under init_lock mm: support anonymous stable page mm: add documentation for page fragment APIs mm: rename __page_frag functions to __page_frag_cache, drop order from drain mm: rename __alloc_page_frag to page_frag_alloc and __free_page_frag to page_frag_free mm, memcg: fix the active list aging for lowmem requests when memcg is enabled mm: don't dereference struct page fields of invalid pages mailmap: add codeaurora.org names for nameless email commits signal: protect SIGNAL_UNKILLABLE from unintentional clearing. mm: pmd dirty emulation in page fault handler ipc/sem.c: fix incorrect sem_lock pairing lib/Kconfig.debug: fix frv build failure mm: get rid of __GFP_OTHER_NODE mm: fix remote numa hits statistics mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done} ocfs2: fix crash caused by stale lvb with fsdlm plugin ...
2017-01-11selftests: x86 protection_keys remove dead codeShuah Khan
Remove commented out calls to pkey_get(). Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
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