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2016-01-06perf/x86/intel/uncore: Remove hard coding of PMON box control MSR offsetHarish Chegondi1-1/+2
Call uncore_pci_box_ctl() function to get the PMON box control MSR offset instead of hard coding the offset. This would allow us to use this snbep_uncore_pci_init_box() function for other PCI PMON devices whose box control MSR offset is different from SNBEP_PCI_PMON_BOX_CTL. Signed-off-by: Harish Chegondi <harish.chegondi@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Harish Chegondi <harish.chegondi@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Lukasz Anaczkowski <lukasz.anaczkowski@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/872e8ef16cfc38e5ff3b45fac1094e6f1722e4ad.1449470704.git.harish.chegondi@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86/intel: Add perf core PMU support for Intel Knights LandingHarish Chegondi3-0/+78
Knights Landing core is based on Silvermont core with several differences. Like Silvermont, Knights Landing has 8 pairs of LBR MSRs. However, the LBR MSRs addresses match those of the Xeon cores' first 8 pairs of LBR MSRs Unlike Silvermont, Knights Landing supports hyperthreading. Knights Landing offcore response events config register mask is different from that of the Silvermont. This patch was developed based on a patch from Andi Kleen. For more details, please refer to the public document: https://software.intel.com/sites/default/files/managed/15/8d/IntelXeonPhi%E2%84%A2x200ProcessorPerformanceMonitoringReferenceManual_Volume1_Registers_v0%206.pdf Signed-off-by: Harish Chegondi <harish.chegondi@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Harish Chegondi <harish.chegondi@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Lukasz Anaczkowski <lukasz.anaczkowski@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/d14593c7311f78c93c9cf6b006be843777c5ad5c.1449517401.git.harish.chegondi@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86/intel/uncore: Add Broadwell-EP uncore supportKan Liang2-5/+149
The uncore subsystem for Broadwell-EP is similar to Haswell-EP. There are some differences in pci device IDs, box number and constraints. This patch extends the Broadwell-DE codes to support Broadwell-EP. Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449176411-9499-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86/rapl: Use unified perf_event_sysfs_show instead of special interfaceHuang Rui1-18/+5
Actually, rapl_sysfs_show is a duplicate of perf_event_sysfs_show. We prefer to use the unified interface. Signed-off-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Dasaratharaman Chandramouli<dasaratharaman.chandramouli@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <rric@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449223661-2437-1-git-send-email-ray.huang@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Enable cycles:pp for Intel AtomStephane Eranian2-0/+3
This patch updates the PEBS support for Intel Atom to provide an alias for the cycles:pp event used by perf record/top by default nowadays. On Atom, only INST_RETIRED:ANY supports PEBS, so we use this event instead with a large cmask to count cycles. Given that Core2 has the same issue, we use the intel_pebs_aliases_core2() function for Atom as well. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Link: http://lkml.kernel.org/r/1449172990-30183-3-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: fix PEBS issues on Intel Atom/Core2Stephane Eranian1-1/+8
This patch fixes broken PEBS support on Intel Atom and Core2 due to wrong pointer arithmetic in intel_pmu_drain_pebs_core(). The get_next_pebs_record_by_bit() was called on PEBS format fmt0 which does not use the pebs_record_nhm layout. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Fixes: 21509084f999 ("perf/x86/intel: Handle multiple records in the PEBS buffer") Link: http://lkml.kernel.org/r/1449182000-31524-3-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Fix LBR related crashes on Intel AtomStephane Eranian1-4/+7
This patches fixes the LBR kernel crashes on Intel Atom. The kernel was assuming that if the CPU supports 64-bit format LBR, then it has an LBR_SELECT MSR. Atom uses 64-bit LBR format but does not have LBR_SELECT. That was causing NULL pointer dereferences in a couple of places. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Fixes: 96f3eda67fcf ("perf/x86/intel: Fix static checker warning in lbr enable") Link: http://lkml.kernel.org/r/1449182000-31524-2-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Fix filter_events() bug with event mappingsStephane Eranian1-1/+10
This patch fixes a bug in the filter_events() function. The patch fixes the bug whereby if some mappings did not exist, e.g., STALLED_CYCLES_FRONTEND, then any event after it in the attrs array would disappear from the published list of events in /sys/devices/cpu/events. This could be verified easily on any system post SNB (which do not publish STALLED_CYCLES_FRONTEND): $ ./perf stat -e cycles,ref-cycles true Performance counter stats for 'true': 1,217,348 cycles <not supported> ref-cycles The problem is that in filter_events() there is an assumption that the argument (attrs) is organized in increasing continuous event indexes related to the event_map(). But if we remove the non-supported events by shifing the position in the array, then the lookup x86_pmu.event_map() needs to compensate for it, otherwise we are looking up the wrong index. This patch corrects this problem by compensating for the deleted events and with that ref-cycles reappears (here shown on Haswell): $ perf stat -e ref-cycles,cycles true Performance counter stats for 'true': 4,525,910 ref-cycles 1,064,920 cycles 0.002943888 seconds time elapsed Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: jolsa@kernel.org Cc: kan.liang@intel.com Fixes: 8300daa26755 ("perf/x86: Filter out undefined events from sysfs events attribute") Link: http://lkml.kernel.org/r/1449516805-6637-1-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Use INST_RETIRED.PREC_DIST for cycles: pppAndi Kleen4-5/+57
Add a new 'three-p' precise level, that uses INST_RETIRED.PREC_DIST as base. The basic mechanism of abusing the inverse cmask to get all cycles works the same as before. PREC_DIST is available on Sandy Bridge or later. It had some problems on Sandy Bridge, so we only use it on IvyBridge and later. I tested it on Broadwell and Skylake. PREC_DIST has special support for avoiding shadow effects, which can give better results compare to UOPS_RETIRED. The drawback is that PREC_DIST can only schedule on counter 1, but that is ok for cycle sampling, as there is normally no need to do multiple cycle sampling runs in parallel. It is still possible to run perf top in parallel, as that doesn't use precise mode. Also of course the multiplexing can still allow parallel operation. :pp stays with the previous event. Example: Sample a loop with 10 sqrt with old cycles:pp 0.14 │10: sqrtps %xmm1,%xmm0 <-------------- 9.13 │ sqrtps %xmm1,%xmm0 11.58 │ sqrtps %xmm1,%xmm0 11.51 │ sqrtps %xmm1,%xmm0 6.27 │ sqrtps %xmm1,%xmm0 10.38 │ sqrtps %xmm1,%xmm0 12.20 │ sqrtps %xmm1,%xmm0 12.74 │ sqrtps %xmm1,%xmm0 5.40 │ sqrtps %xmm1,%xmm0 10.14 │ sqrtps %xmm1,%xmm0 10.51 │ ↑ jmp 10 We expect all 10 sqrt to get roughly the sample number of samples. But you can see that the instruction directly after the JMP is systematically underestimated in the result, due to sampling shadow effects. With the new PREC_DIST based sampling this problem is gone and all instructions show up roughly evenly: 9.51 │10: sqrtps %xmm1,%xmm0 11.74 │ sqrtps %xmm1,%xmm0 11.84 │ sqrtps %xmm1,%xmm0 6.05 │ sqrtps %xmm1,%xmm0 10.46 │ sqrtps %xmm1,%xmm0 12.25 │ sqrtps %xmm1,%xmm0 12.18 │ sqrtps %xmm1,%xmm0 5.26 │ sqrtps %xmm1,%xmm0 10.13 │ sqrtps %xmm1,%xmm0 10.43 │ sqrtps %xmm1,%xmm0 0.16 │ ↑ jmp 10 Even with PREC_DIST there is still sampling skid and the result is not completely even, but systematic shadow effects are significantly reduced. The improvements are mainly expected to make a difference in high IPC code. With low IPC it should be similar. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: hpa@zytor.com Link: http://lkml.kernel.org/r/1448929689-13771-2-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for SkylakeAndi Kleen2-4/+3
I added UOPS_RETIRED.ALL by mistake to the Skylake PEBS event list for cycles:pp. But the event is not documented for Skylake, and has some issues. The recommended replacement for cycles:pp is to use INST_RETIRED.ANY+pebs as a base, similar to what CPUs before Sandy Bridge did. This new event is called INST_RETIRED.TOTAL_CYCLES_PS. The event is not really new, but has been already used by perf before Sandy Bridge for the original cycles:p Note the SDM doesn't document that event either, but it's being documented in the latest version of the event list on: https://download.01.org/perfmon/SKL This patch does: - Remove UOPS_RETIRED.ALL from the Skylake PEBS event list - Add INST_RETIRED.ANY to the Skylake PEBS event list, and an table entry to allow cmask=16,inv=1 for cycles:pp - We don't need an extra entry for the base INST_RETIRED event, because it is already covered by the catch-all PEBS table entry. - Switch Skylake to use the Core2 PEBS alias (which is INST_RETIRED.TOTAL_CYCLES_PS) Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: hpa@zytor.com Link: http://lkml.kernel.org/r/1448929689-13771-1-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Allow zero PEBS status with only single active eventAndi Kleen1-0/+12
Normally we drop PEBS events with a zero status field. But when there is only a single PEBS event active we can assume the PEBS record is for that event. The PEBS buffer is always flushed when PEBS events are disabled, so there is no risk of mishandling state PEBS records this way. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/x86: Remove warning for zero PEBS statusAndi Kleen1-4/+1
The recent commit: 75f80859b130 ("perf/x86/intel/pebs: Robustify PEBS buffer drain") causes lots of warnings on different CPUs before Skylake when running PEBS intensive workloads. They can have a zero status field in the PEBS record when PEBS is racing with clearing of GLOBAl_STATUS. This also can cause hangs (it seems there are still problems with printk in NMI). Disable the warning, but still ignore the record. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449177740-5422-1-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf/core: Collapse more IPI loopsPeter Zijlstra1-73/+33
This patch collapses the two 'hard' cases, which are perf_event_{dis,en}able(). I cannot seem to convince myself the current code is correct. So starting with perf_event_disable(); we don't strictly need to test for event->state == ACTIVE, ctx->is_active is enough. If the event is not scheduled while the ctx is, __perf_event_disable() still does the right thing. Its a little less efficient to IPI in that case, over-all simpler. For perf_event_enable(); the same goes, but I think that's actually broken in its current form. The current condition is: ctx->is_active && event->state == OFF, that means it doesn't do anything when !ctx->active && event->state == OFF. This is wrong, it should still mark the event INACTIVE in that case, otherwise we'll still not try and schedule the event once the context becomes active again. This patch implements the two function using the new event_function_call() and does away with the tricky event->state tests. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Alexander Shishkin <alexander.shishkin@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06Merge branch 'perf/urgent' into perf/core, to pick up fixes before applying ↵Ingo Molnar1-29/+6
new changes Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf: Fix race in swevent hashPeter Zijlstra1-19/+1
There's a race on CPU unplug where we free the swevent hash array while it can still have events on. This will result in a use-after-free which is BAD. Simply do not free the hash array on unplug. This leaves the thing around and no use-after-free takes place. When the last swevent dies, we do a for_each_possible_cpu() iteration anyway to clean these up, at which time we'll free it, so no leakage will occur. Reported-by: Sasha Levin <sasha.levin@oracle.com> Tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-06perf: Fix race in perf_event_exec()Peter Zijlstra1-10/+5
I managed to tickle this warning: [ 2338.884942] ------------[ cut here ]------------ [ 2338.890112] WARNING: CPU: 13 PID: 35162 at ../kernel/events/core.c:2702 task_ctx_sched_out+0x6b/0x80() [ 2338.900504] Modules linked in: [ 2338.903933] CPU: 13 PID: 35162 Comm: bash Not tainted 4.4.0-rc4-dirty #244 [ 2338.911610] Hardware name: Intel Corporation S2600GZ/S2600GZ, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013 [ 2338.923071] ffffffff81f1468e ffff8807c6457cb8 ffffffff815c680c 0000000000000000 [ 2338.931382] ffff8807c6457cf0 ffffffff810c8a56 ffffe8ffff8c1bd0 ffff8808132ed400 [ 2338.939678] 0000000000000286 ffff880813170380 ffff8808132ed400 ffff8807c6457d00 [ 2338.947987] Call Trace: [ 2338.950726] [<ffffffff815c680c>] dump_stack+0x4e/0x82 [ 2338.956474] [<ffffffff810c8a56>] warn_slowpath_common+0x86/0xc0 [ 2338.963195] [<ffffffff810c8b4a>] warn_slowpath_null+0x1a/0x20 [ 2338.969720] [<ffffffff811a49cb>] task_ctx_sched_out+0x6b/0x80 [ 2338.976244] [<ffffffff811a62d2>] perf_event_exec+0xe2/0x180 [ 2338.982575] [<ffffffff8121fb6f>] setup_new_exec+0x6f/0x1b0 [ 2338.988810] [<ffffffff8126de83>] load_elf_binary+0x393/0x1660 [ 2338.995339] [<ffffffff811dc772>] ? get_user_pages+0x52/0x60 [ 2339.001669] [<ffffffff8121e297>] search_binary_handler+0x97/0x200 [ 2339.008581] [<ffffffff8121f8b3>] do_execveat_common.isra.33+0x543/0x6e0 [ 2339.016072] [<ffffffff8121fcea>] SyS_execve+0x3a/0x50 [ 2339.021819] [<ffffffff819fc165>] stub_execve+0x5/0x5 [ 2339.027469] [<ffffffff819fbeb2>] ? entry_SYSCALL_64_fastpath+0x12/0x71 [ 2339.034860] ---[ end trace ee1337c59a0ddeac ]--- Which is a WARN_ON_ONCE() indicating that cpuctx->task_ctx is not what we expected it to be. This is because context switches can swap the task_struct::perf_event_ctxp[] pointer around. Therefore you have to either disable preemption when looking at current, or hold ctx->lock. Fix perf_event_enable_on_exec(), it loads current->perf_event_ctxp[] before disabling interrupts, therefore a preemption in the right place can swap contexts around and we're using the wrong one. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Potapenko <glider@google.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: syzkaller <syzkaller@googlegroups.com> Link: http://lkml.kernel.org/r/20151210195740.GG6357@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-12-18Merge tag 'perf-core-for-mingo-3' of ↵Ingo Molnar24-19/+2054
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull new perf tool feature from Arnaldo Carvalho de Melo: " User visible changes: - Generate perf.data files from 'perf stat', to tap into the scripting capabilities perf has instead of defining a 'perf stat' specific scripting support to calculate event ratios, etc. Simple example: $ perf stat record -e cycles usleep 1 Performance counter stats for 'usleep 1': 1,134,996 cycles 0.000670644 seconds time elapsed $ perf stat report Performance counter stats for '/home/acme/bin/perf stat record -e cycles usleep 1': 1,134,996 cycles 0.000670644 seconds time elapsed $ It generates PERF_RECORD_ userspace records to store the details: $ perf report -D | grep PERF_RECORD 0xf0 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 27637 0x118 [0x12]: PERF_RECORD_CPU_MAP nr: 1 cpu: 65535 0x12a [0x40]: PERF_RECORD_STAT_CONFIG 0x16a [0x30]: PERF_RECORD_STAT -1 -1 0x19a [0x40]: PERF_RECORD_MMAP -1/0: [0xffffffff81000000(0x1f000000) @ 0xffffffff81000000]: x [kernel.kallsyms]_text 0x1da [0x18]: PERF_RECORD_STAT_ROUND [acme@ssdandy linux]$ An effort was made to make perf.data files generated like this to not generate cryptic messages when processed by older tools. The 'perf script' bits need rebasing, will go up later. Jiri's cover letter for this series: The initial attempt defined its own formula lang and allowed triggering user's script on the end of the stat command: http://marc.info/?l=linux-kernel&m=136742146322273&w=2 This patchset abandons the idea of new formula language and rather adds support to: - store stat data into perf.data file - add python support to process stat events Basically it allows to store stat data into perf.data and post process it with python scripts in a similar way we do for sampling data. The stat data are stored in new stat, stat-round, stat-config user events. stat - stored for each read syscall of the counter stat round - stored for each interval or end of the command invocation stat config - stores all the config information needed to process data so report tool could restore the same output as record The python script can now define 'stat__<eventname>_<modifier>' functions to get stat events data and 'stat__interval' to get stat-round data. See CPI script example in scripts/python/stat-cpi.py." Also a few other changes: User visible changes: - Make command line options always available, even when they depend on some feature being enabled, warning the user about use of such options (Wang Nan) - Support --vmlinux in perf record, useful, so far, for eBPF, where we will set up events that will be used in the record session (He Kuang) - Automatically disable collecting branch flags and cycles with --call-graph lbr. This allows avoiding a bunch of extra MSR reads in the PMI on Skylake. (Andi Kleen) Infrastructure changes: - Dump the stack when a 'perf test -v ' entry segfaults, so far we would have to run it under gdb with 'set follow-fork-mode child' set to get a proper backtrace (Arnaldo Carvalho de Melo) - Initialize the refcnt in 'struct thread' to 1 and fixup its users accordingly, so that we try to have the same refcount model accross the perf codebase (Arnaldo Carvalho de Melo) - More prep work for moving the subcmd infrastructure out of tools/perf/ and into tools/lib/subcmd/ to be used by other tools/ living utilities (Josh Poimboeuf) - Fix 'perf test' hist testcases when kptr_restrict is on (Namhyung Kim) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-12-18Merge branch 'perf/urgent' into perf/core, to make sure a cherry-picked ↵Ingo Molnar0-0/+0
commit does not create conflicts Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-12-18Merge tag 'perf-urgent-for-mingo' of ↵Ingo Molnar1-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent Pull perf/urgent tooling fix from Arnaldo Carvalho de Melo: User visible changes: - Fix 'perf list' segfault due to lack of support for PERF_CONF_SW_BPF_OUTPUT in an array used just for printing available events, robustify the code involved (Arnaldo Carvalho de Melo) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-12-18Merge tag 'perf-core-for-mingo-2.1' of ↵Ingo Molnar85-582/+1103
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements from Arnaldo Carvalho de Melo: User visible changes: - Add record.build-id config option to 'perf record', to allow configuring in the ~/.perfconfig file if and how build-ids should be processed, allowing a permanent setting for options such as -B and -N: (Namhyung Kim) $ perf record -h -B -N Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -B, --no-buildid do not collect buildids in perf.data -N, --no-buildid-cache do not update the buildid cache $ Infrastructure changes: - Move code for options parsing and subcommand handling from tools/perf/ to tools/lib/subcmd/, so that it can be used by other tools/ living utilities (Josh Poimboeuf) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-12-17perf stat report: Allow to override aggr_modeJiri Olsa2-0/+27
Allowing to override record aggr_mode. It's possible to use perf stat like: $ perf stat report -A $ perf stat report --per-core $ perf stat report --per-socket To customize the recorded aggregate mode regardless what was used during the stat record command. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-19-git-send-email-jolsa@kernel.org [ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Process event update eventsJiri Olsa1-0/+1
Adding processing of event update events, so perf stat report can store additional info for events - unit,scale,name. Committer note: Before: # perf stat record -e power/energy-cores/ -a ^C Performance counter stats for 'system wide': 77.41 Joules power/energy-cores/ 1.597176695 seconds time elapsed # perf stat report Performance counter stats for '/home/acme/bin/perf stat record -e power/energy-cores/ -a': 332,488,114,176 power/energy-cores/ 1.597176695 seconds time elapsed # After, using the same perf.data file generated in the "Before" case above: # perf stat report Performance counter stats for '/home/acme/bin/perf stat record -e power/energy-cores/ -a': 77.41 Joules power/energy-cores/ 1.597176695 seconds time elapsed # Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> 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/1446734469-11352-17-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Process stat and stat round eventsJiri Olsa1-0/+28
Adding processing of stat and stat round events. The stat data com in stat events, using generic function process_stat_round_event to store data under perf_evsel object. The stat-round events comes each interval or as last event in non interval mode. The function process_stat_round_event process stored data for each perf_evsel object and print it out. Committer note: After this patch: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.498381 task-clock (msec) # 0.571 CPUs utilized 2 context-switches # 0.004 M/sec 0 cpu-migrations # 0.000 K/sec 149 page-faults # 0.299 M/sec 1,271,635 cycles # 2.552 GHz 928,712 stalled-cycles-frontend # 73.03% frontend cycles idle 663,286 stalled-cycles-backend # 52.16% backend cycles idle 792,614 instructions # 0.62 insns per cycle # 1.17 stalled cycles per insn 136,850 branches # 274.589 M/sec <not counted> branch-misses (0.00%) 0.000873419 seconds time elapsed $ $ perf stat report Performance counter stats for '/home/acme/bin/perf stat record usleep 1': 0.498381 task-clock (msec) # 0.571 CPUs utilized 2 context-switches # 0.004 M/sec 0 cpu-migrations # 0.000 K/sec 149 page-faults # 0.299 M/sec 1,271,635 cycles # 2.552 GHz 928,712 stalled-cycles-frontend # 73.03% frontend cycles idle 663,286 stalled-cycles-backend # 52.16% backend cycles idle 792,614 instructions # 0.62 insns per cycle # 1.17 stalled cycles per insn 136,850 branches # 274.589 M/sec <not counted> branch-misses (0.00%) 0.000873419 seconds time elapsed $ Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-16-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Move csv_sep initialization before report commandJiri Olsa1-7/+7
So we have csv_sep properly initialized before report command leg. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-18-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Add support to initialize aggr_map from fileJiri Olsa1-0/+103
Using perf.data's perf_env data to initialize aggregate config. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-15-git-send-email-jolsa@kernel.org [ s/stat/st/g, s/socket/socket_id/g to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Process stat config eventJiri Olsa1-0/+10
Adding processing of stat config event and initialize stat_config object. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-14-git-send-email-jolsa@kernel.org [ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Process cpu/threads mapsJiri Olsa1-2/+64
Adding processing of cpu/threads maps. Configuring session's evlist with these maps. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-13-git-send-email-jolsa@kernel.org [ s/stat/st/g, s/time/tm/g parameters to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat report: Add report commandJiri Olsa2-4/+69
Adding 'perf stat report' command support. ATM it only processes attr events and display nothing. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-12-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Synthesize event update eventsJiri Olsa1-0/+59
Synthesize other events stuff not carried within attr event - unit, scale, name. Reported-by: Kan Liang <kan.liang@intel.com> 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> Link: http://lkml.kernel.org/r/1446734469-11352-11-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Do not allow record with multiple runs modeJiri Olsa1-0/+5
We currently don't support storing multiple session in perf.data, so we can't allow -r option in stat record. $ perf stat -e cycles -r 2 record ls Cannot use -r option with perf stat record. Committer note: Before this patch we would a perf.data file such as: $ perf stat -e cycles -r 2 record ls <SNIP> Performance counter stats for 'ls' (2 runs): 3,935,236 cycles 0.002353261 seconds time elapsed ( +- 4.76% ) $ perf report -D | grep PERF_RECORD | grep ROUND 0xf0 [0]: failed to process type: 16 Error: failed to process sample $ Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> 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/1446734469-11352-10-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Write stat round events on recordJiri Olsa1-0/+20
Writing stat round events on 'perf stat record' for each interval round. In non interval mode we store round event after the last stat event. Committer note: After the patch: $ perf report -D | grep PERF_RECORD | grep ROUND 0x852 [0x18]: PERF_RECORD_STAT_ROUND $ Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> 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/1446734469-11352-9-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Write stat events on recordJiri Olsa1-0/+19
Writing stat events on 'perf stat record' at the time we read counter values from kernel. Committer note: After the patch: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.598006 task-clock (msec) # 0.484 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 52 page-faults # 0.087 M/sec 882,744 cycles # 1.476 GHz 581,416 stalled-cycles-frontend # 65.86% frontend cycles idle <not supported> stalled-cycles-backend 636,479 instructions # 0.72 insns per cycle # 0.91 stalled cycles per insn 129,334 branches # 216.275 M/sec 7,512 branch-misses # 5.81% of all branches 0.001235157 seconds time elapsed $ oldperf evlist task-clock context-switches cpu-migrations page-faults cycles stalled-cycles-frontend stalled-cycles-backend instructions branches branch-misses $ oldperf report --stdio Error: The perf.data file has no samples! # To display the perf.data header info, please use --header/--header-only options. # $ perf report -D | grep PERF_RECORD 0x5b0 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 5504 0x5d8 [0x12]: PERF_RECORD_CPU_MAP nr: 1 cpu: 65535 0x5ea [0x40]: PERF_RECORD_STAT_CONFIG 0x62a [0x30]: PERF_RECORD_STAT 0x65a [0x30]: PERF_RECORD_STAT 0x68a [0x30]: PERF_RECORD_STAT 0x6ba [0x30]: PERF_RECORD_STAT 0x6ea [0x30]: PERF_RECORD_STAT 0x71a [0x30]: PERF_RECORD_STAT 0x74a [0x30]: PERF_RECORD_STAT 0x77a [0x30]: PERF_RECORD_STAT 0x7aa [0x30]: PERF_RECORD_STAT -1 -1 0x7da [0x40]: PERF_RECORD_MMAP -1/0: [0xffffffff81000000(0x1f000000) @ 0xffffffff81000000]: x [kernel.kallsyms]_text $ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Add pipe support for record commandJiri Olsa1-11/+28
Allowing storing stat record data into pipe, so report tools (report/script) could read data directly from record. Committer note: Before this patch: $ perf stat record -o - usleep 1 | perf report -i - incompatible file format (rerun with -v to learn more) $ perf stat record -o - usleep 1 | perf script -i - incompatible file format (rerun with -v to learn more) $ ls -la perf.data ls: cannot access perf.data: No such file or directory $ After: $ perf stat record -o - usleep 1 | perf report -i - # To display the perf.data header info, please use # --header/--header-only options. # Error: The - file has no samples! $ perf stat record -o - usleep 1 | perf script -i - Display of symbols requested but neither sample IP nor sample address is selected. Hence, no addresses to convert to symbols. 0 [0x80]: failed to process type: 64 $ ls -la perf.data ls: cannot access perf.data: No such file or directory $ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Store events IDs in perf data fileJiri Olsa1-0/+35
Store event IDs in evlist object so it get stored into perf.data file. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf evlist: Export id_add_fd()Jiri Olsa2-3/+6
Will be used to storing the event IDs in evlist object so it get stored into perf.data file. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-6-git-send-email-jolsa@kernel.org [ Split from the patch storing the ids in the perf.data file ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Synthesize stat record dataJiri Olsa1-13/+43
Synthesizing needed stat record data for report/script: - cpu/thread maps - stat config Committer note: New records generated on a perf.data file with this patch: $ perf report -D | grep PERF_RECORD_ 0x568 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 29097 0x590 [0x12]: PERF_RECORD_CPU_MAP nr: 1 cpu: 65535 0x5a2 [0x40]: PERF_RECORD_STAT_CONFIG $ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-5-git-send-email-jolsa@kernel.org [ Adjusted wrt kernel PERF_RECORD_MMAP added when introducing 'perf stat record' ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Initialize record featuresJiri Olsa2-0/+18
Disabling all non stat related features. Also as we now enable STAT feature in the data file, adding code to instruct session open to skip sample type checking for stat data files. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.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/1446734469-11352-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf stat record: Add record commandJiri Olsa2-4/+128
Add 'perf stat record' command support. It creates simple (header only) perf.data file ATM. The record command could be specified anywhere among stat options. All stat command options are valid for stat record command with '-o' option exception. If specified for record command it denotes the perf data file name. Committer note: Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless while avoiding that older tools show confusing messages, for instance, with sample_type = 0, we get: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.630237 task-clock (msec) # 0.528 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 52 page-faults # 0.083 M/sec 978,312 cycles # 1.552 GHz 671,931 stalled-cycles-frontend # 68.68% frontend cycles idle <not supported> stalled-cycles-backend 646,379 instructions # 0.66 insns per cycle # 1.04 stalled cycles per insn 131,046 branches # 207.931 M/sec 7,073 branch-misses # 5.40% of all branches 0.001193240 seconds time elapsed $ oldperf evlist WARNING: The perf.data file's data size field is 0 which is unexpected. Was the 'perf record' command properly terminated? non matching sample_type $ While with sample_type set to PERF_SAMPLE_IDENTIFIER, after we re-run 'perf stat record usleep' we get: $ oldperf evlist WARNING: The perf.data file's data size field is 0 which is unexpected. Was the 'perf record' command properly terminated? task-clock context-switches cpu-migrations page-faults cycles stalled-cycles-frontend stalled-cycles-backend instructions branches branch-misses $ Which at least shows the names of the events in the perf.data file. Additionally, such files, when passed to 'perf report' will produce: $ oldperf report --stdio WARNING: The perf.data file's data size field is 0 which is unexpected. Was the 'perf record' command properly terminated? Warning: Kernel address maps (/proc/{kallsyms,modules}) were restricted. Check /proc/sys/kernel/kptr_restrict before running 'perf record'. As no suitable kallsyms nor vmlinux was found, kernel samples can't be resolved. Samples in kernel modules can't be resolved as well. Error: The perf.data file has no samples! # To display the perf.data header info, please use --header/--header-only options. # $ Which is confusing and can be solved by just adding the kernel mmap record, which will also remove that warning about the data size field being equal to zero, after generating the mmap record: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.600796 task-clock (msec) # 0.478 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 54 page-faults # 0.090 M/sec 886,844 cycles # 1.476 GHz 582,169 stalled-cycles-frontend # 65.65% frontend cycles idle <not supported> stalled-cycles-backend 638,344 instructions # 0.72 insns per cycle # 0.91 stalled cycles per insn 130,204 branches # 216.719 M/sec 7,500 branch-misses # 5.76% of all branches 0.001255897 seconds time elapsed $ oldperf evlist task-clock context-switches cpu-migrations page-faults cycles stalled-cycles-frontend stalled-cycles-backend instructions branches branch-misses $ oldperf report --stdio Error: The perf.data file has no samples! # To display the perf.data header info, please use --header/--header-only options. # [acme@zoo linux]$ No warnings, sensible output about what are the events in the perf.data file and also a "file has no samples" message, which indeed it doesn't. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: htp://lkml.kernel.org/r/1446734469-11352-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Introduce stat perf.data header featureJiri Olsa3-0/+17
Introducing the 'stat' feature to mark a perf.data as created by the 'perf stat record' command. It contains no data. It's needed so that the report tools (report/script) can differentiate sampling data from counting data, because they need to be treated in a different way. In the future it might be used to store the version of the stat storage system used. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-28-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf report: Display newly added events in raw dumpJiri Olsa1-0/+19
The 'perf report -D' command will now display detailed output for these newly added events: event_update thread_map cpu_map stat stat_config stat_round Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-27-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add perf_event__fprintf_event_update functionJiri Olsa2-0/+39
To display a 'event update' event for raw dump. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-26-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add event_update event cpus typeJiri Olsa4-0/+79
Adding the cpumask 'event update' event, that stores/transfer the cpumask for a event. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-25-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add event_update event name typeJiri Olsa4-0/+50
Adding name type 'event update' event, that stores/transfer events name. Event's name is stored within perf.data's EVENT_DESC feature, but we don't have it if we get the report data from pipe. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-24-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add event_update event scale typeJiri Olsa4-0/+55
A__allocdding scale type 'event update' event, that stores/transfer events scale value. The PMU events can define the scale value which is used to multiply events data. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-23-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add event_update event unit typeJiri Olsa7-0/+99
Adding unit type 'event update' event, that stores/transfer events unit name. The unit name is part of the perf stat output data. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-22-git-send-email-jolsa@kernel.org [ Rename __alloc() to __new() for consistency ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add event_update user level eventJiri Olsa6-0/+56
It'll serve as a base event for additional event attributes details, that are not part of the attr event. At the moment this event is just a dummy one without any specific functionality. The type value will distinguish the update event details. It'll come in the following patches. The idea for this event is to be extensible for any update that the event might need in the future. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-21-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat events fprintf functionsJiri Olsa2-0/+43
Introducing the following functions to display the stat events for raw dump. perf_event__fprintf_stat perf_event__fprintf_stat_round perf_event__fprintf_stat_config Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-20-git-send-email-jolsa@kernel.org [ s/stat/st/g and s/round/rd/g parameters to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat round event synthesize functionJiri Olsa5-0/+47
Introduce the perf_event__synthesize_stat_round function to synthesize a 'struct stat_round_event'. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-19-git-send-email-jolsa@kernel.org [ Renamed 'time' parameter to 'evtime' to fix build on older systems ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat round user level eventJiri Olsa4-1/+37
Adding the stat round event to be stored after each stat interval round, so that report tools (report/script) gets notified and process interval data. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-18-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat event read functionJiri Olsa2-0/+29
Introducing the perf_event__process_stat_event function to process a 'struct perf_stat' data from a stat event. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.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/1445784728-21732-17-git-send-email-jolsa@kernel.org [ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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