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perf: Introduce perf_pmu_migrate_context()

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Originally from Peter Zijlstra. The helper migrates perf events
from one cpu to another cpu.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1339741902-8449-5-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Yan, Zheng 2012-06-15 14:31:33 +08:00 • committed by Ingo Molnar
parent e2d37cd213
commit 0cda4c0231
2 changed files with 38 additions and 0 deletions
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include/linux/perf_event.h
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@ -1107,6 +1107,8 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr,
struct task_struct *task,
perf_overflow_handler_t callback,
void *context);
extern void perf_pmu_migrate_context(struct pmu *pmu,
int src_cpu, int dst_cpu);
extern u64 perf_event_read_value(struct perf_event *event,
u64 *enabled, u64 *running);