diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-05-25 17:39:05 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-25 21:41:12 +0200 |
| commit | a78ac3258782f3e64cb40beb5990808e1febcc0c (patch) | |
| tree | 692462a974e4c26bdb7fa7fae727a6b326a0eeee /include | |
| parent | 48e22d56ecdeddd1ffb42a02fccba5c6ef42b133 (diff) | |
perf_counter: Generic per counter interrupt throttle
Introduce a generic per counter interrupt throttle.
This uses the perf_counter_overflow() quick disable to throttle a specific
counter when its going too fast when a pmu->unthrottle() method is provided
which can undo the quick disable.
Power needs to implement both the quick disable and the unthrottle method.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <20090525153931.703093461@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_counter.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 0c160be2078f..e3a7585d3e43 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -267,6 +267,15 @@ enum perf_event_type { PERF_EVENT_PERIOD = 4, /* + * struct { + * struct perf_event_header header; + * u64 time; + * }; + */ + PERF_EVENT_THROTTLE = 5, + PERF_EVENT_UNTHROTTLE = 6, + + /* * When header.misc & PERF_EVENT_MISC_OVERFLOW the event_type field * will be PERF_RECORD_* * @@ -367,6 +376,7 @@ struct pmu { int (*enable) (struct perf_counter *counter); void (*disable) (struct perf_counter *counter); void (*read) (struct perf_counter *counter); + void (*unthrottle) (struct perf_counter *counter); }; /** @@ -613,6 +623,7 @@ extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); extern int sysctl_perf_counter_priv; extern int sysctl_perf_counter_mlock; +extern int sysctl_perf_counter_limit; extern void perf_counter_init(void); |