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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-11 14:59:31 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-11 15:45:55 +0100 |
| commit | 1d1c7ddbfab358445a542715551301b7fc363e28 (patch) | |
| tree | d4421834d109b206f39c2019ea039fd42ed22e1d /include | |
| parent | bae43c9945ebeef15e7952e317efb02393d3bfc7 (diff) | |
| download | op-kernel-dev-1d1c7ddbfab358445a542715551301b7fc363e28.zip op-kernel-dev-1d1c7ddbfab358445a542715551301b7fc363e28.tar.gz | |
perf counters: add prctl interface to disable/enable counters
Add a way for self-monitoring tasks to disable/enable counters summarily,
via a prctl:
PR_TASK_PERF_COUNTERS_DISABLE 31
PR_TASK_PERF_COUNTERS_ENABLE 32
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_counter.h | 4 | ||||
| -rw-r--r-- | include/linux/prctl.h | 3 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 30c0ec8..97d86c2 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -213,6 +213,8 @@ extern u64 hw_perf_save_disable(void); extern void hw_perf_restore(u64 ctrl); extern void atomic64_counter_set(struct perf_counter *counter, u64 val64); extern u64 atomic64_counter_read(struct perf_counter *counter); +extern int perf_counter_task_disable(void); +extern int perf_counter_task_enable(void); #else static inline void @@ -226,6 +228,8 @@ static inline void perf_counter_notify(struct pt_regs *regs) { } static inline void perf_counter_print_debug(void) { } static inline void hw_perf_restore(u64 ctrl) { } static inline u64 hw_perf_save_disable(void) { return 0; } +static inline int perf_counter_task_disable(void) { return -EINVAL; } +static inline int perf_counter_task_enable(void) { return -EINVAL; } #endif #endif /* _LINUX_PERF_COUNTER_H */ diff --git a/include/linux/prctl.h b/include/linux/prctl.h index 48d887e..b00df4c 100644 --- a/include/linux/prctl.h +++ b/include/linux/prctl.h @@ -85,4 +85,7 @@ #define PR_SET_TIMERSLACK 29 #define PR_GET_TIMERSLACK 30 +#define PR_TASK_PERF_COUNTERS_DISABLE 31 +#define PR_TASK_PERF_COUNTERS_ENABLE 32 + #endif /* _LINUX_PRCTL_H */ |
