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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-05-21 14:43:08 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-06-09 11:12:37 +0200 |
| commit | e78505958cf123048fb48cb56b79cebb8edd15fb (patch) | |
| tree | 3688d124cdc906cbe9f6587c8671ba0a14c95262 /include/linux/perf_event.h | |
| parent | a6e6dea68c18f705957573ee5596097c7e82d0e5 (diff) | |
| download | lwn-e78505958cf123048fb48cb56b79cebb8edd15fb.tar.gz lwn-e78505958cf123048fb48cb56b79cebb8edd15fb.zip | |
perf: Convert perf_event to local_t
Since now all modification to event->count (and ->prev_count
and ->period_left) are local to a cpu, change then to local64_t so we
avoid the LOCK'ed ops.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index f34dab9b275e..7342979f95f2 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -487,6 +487,7 @@ struct perf_guest_info_callbacks { #include <linux/cpu.h> #include <asm/atomic.h> #include <asm/local.h> +#include <asm/local64.h> #define PERF_MAX_STACK_DEPTH 255 @@ -536,10 +537,10 @@ struct hw_perf_event { struct arch_hw_breakpoint info; #endif }; - atomic64_t prev_count; + local64_t prev_count; u64 sample_period; u64 last_period; - atomic64_t period_left; + local64_t period_left; u64 interrupts; u64 freq_time_stamp; @@ -670,7 +671,7 @@ struct perf_event { enum perf_event_active_state state; unsigned int attach_state; - atomic64_t count; + local64_t count; atomic64_t child_count; /* |