diff options
| author | Kan Liang <[email protected]> | 2018-02-12 14:20:32 -0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-03-09 08:22:20 +0100 |
| commit | bcfbe5c41d630ce6b74da45134cea484248b515a (patch) | |
| tree | 6dafa39fc7eb4cacbeed31c2ebf4e52f2626e320 | |
| parent | d31fc13fdcb20e1c317f9a7dd6273c18fbd58308 (diff) | |
perf/x86: Introduce a ->read() callback in 'struct x86_pmu'
Auto-reload needs to be specially handled when reading event counts.
Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Vince Weaver <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/events/core.c | 2 | ||||
| -rw-r--r-- | arch/x86/events/perf_event.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 5a3ccd1715e2..00a6251981d2 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1881,6 +1881,8 @@ early_initcall(init_hw_perf_events); static inline void x86_pmu_read(struct perf_event *event) { + if (x86_pmu.read) + return x86_pmu.read(event); x86_perf_event_update(event); } diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 6495ffd57e3e..d445f0026989 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -520,6 +520,7 @@ struct x86_pmu { void (*disable)(struct perf_event *); void (*add)(struct perf_event *); void (*del)(struct perf_event *); + void (*read)(struct perf_event *event); int (*hw_config)(struct perf_event *event); int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign); unsigned eventsel; |