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| author |   Andi Kleen <ak@linux.intel.com> | 2015-05-27 21:13:14 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-08-04 10:16:56 +0200 |
| commit | a7b58d211ba18c9175b139e18b68c86a6bcc3c3f (patch) | |
| tree | b0f62b14b572d119b4e5633dfba9bc97308123f2 /arch/x86/kernel/cpu/perf_event_intel_ds.c | |
| parent | perf/x86/intel: Add support for PEBSv3 profiling (diff) | |
| download | wireguard-linux-a7b58d211ba18c9175b139e18b68c86a6bcc3c3f.tar.xz wireguard-linux-a7b58d211ba18c9175b139e18b68c86a6bcc3c3f.zip | |
perf/x86/intel/lbr: Allow time stamp for free running PEBSv3
With PEBSv3 the PEBS record contains a time stamp. That means we can allow
free-running PEBS without a PMI even if the user program requested a time stamp.
This avoids the need to use -T to get free running PEBS, and also avoids
any problems with mis-identifying MMAPs later.
Move the free_running_flags state into a variable in x86_pmu and use it.
This only works when no explicit clock_id is set.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: eranian@google.com
Cc: jolsa@redhat.com
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1432786398-23861-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel_ds.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel_ds.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c index 410270a9078f..03773c230fb0 100644 --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c @@ -1273,6 +1273,7 @@ void __init intel_ds_init(void) x86_pmu.pebs_record_size = sizeof(struct pebs_record_skl); x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm; + x86_pmu.free_running_flags |= PERF_SAMPLE_TIME; break; default: |