diff options
| 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 /include/linux/sched/clock.h | |
| parent | 71fdb70eb48784c1f28cdf2e67c4c587dd7f2594 (diff) | |
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 'include/linux/sched/clock.h')
| -rw-r--r-- | include/linux/sched/clock.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/include/linux/sched/clock.h b/include/linux/sched/clock.h index 4a68c6791207..34fe92ce1ebd 100644 --- a/include/linux/sched/clock.h +++ b/include/linux/sched/clock.h @@ -54,15 +54,16 @@ static inline u64 local_clock(void) } #else extern void sched_clock_init_late(void); -/* - * Architectures can set this to 1 if they have specified - * CONFIG_HAVE_UNSTABLE_SCHED_CLOCK in their arch Kconfig, - * but then during bootup it turns out that sched_clock() - * is reliable after all: - */ extern int sched_clock_stable(void); extern void clear_sched_clock_stable(void); +/* + * When sched_clock_stable(), __sched_clock_offset provides the offset + * between local_clock() and sched_clock(). + */ +extern u64 __sched_clock_offset; + + extern void sched_clock_tick(void); extern void sched_clock_idle_sleep_event(void); extern void sched_clock_idle_wakeup_event(u64 delta_ns); |