Messages in this thread Patch in this message |  | | From | kan.liang@linux ... | Subject | [PATCH 3/4] perf/x86: introduce read function for x86_pmu | Date | Mon, 18 Dec 2017 03:34:50 -0800 |
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From: Kan Liang <kan.liang@linux.intel.com>
Large PEBS need to be specially handled in event count read.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com> --- arch/x86/events/core.c | 3 +++ arch/x86/events/perf_event.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index f74e21d..c781497 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1899,6 +1899,9 @@ 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, 0, 0); } diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index fabb8b3..3a7a2e7 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -534,6 +534,7 @@ 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; -- 2.7.4
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