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| author | Peter Zijlstra <peterz@infradead.org> | 2017-03-17 12:48:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-23 07:31:49 +0100 |
| commit | 698eff6355f735d46d1b7113df8b422874cd7988 (patch) | |
| tree | 77a7207a64ac5c8b87844bc4e91f551bf4102275 /arch/x86/include/asm/timer.h | |
| parent | 71fdb70eb48784c1f28cdf2e67c4c587dd7f2594 (diff) | |
| download | linux-0-day-698eff6355f735d46d1b7113df8b422874cd7988.tar.gz linux-0-day-698eff6355f735d46d1b7113df8b422874cd7988.tar.xz | |
sched/clock, x86/perf: Fix "perf test tsc"
People reported that commit:
5680d8094ffa ("sched/clock: Provide better clock continuity")
broke "perf test tsc".
That commit added another offset to the reported clock value; so
take that into account when computing the provided offset values.
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Tested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 5680d8094ffa ("sched/clock: Provide better clock continuity")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/timer.h')
| -rw-r--r-- | arch/x86/include/asm/timer.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/timer.h b/arch/x86/include/asm/timer.h index a04eabd43d066..27e9f9d769b89 100644 --- a/arch/x86/include/asm/timer.h +++ b/arch/x86/include/asm/timer.h @@ -12,6 +12,8 @@ extern int recalibrate_cpu_khz(void); extern int no_timer_check; +extern bool using_native_sched_clock(void); + /* * We use the full linear equation: f(x) = a + b*x, in order to allow * a continuous function in the face of dynamic freq changes. |