lkml.org 
[lkml]   [2018]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V3 2/5] perf/x86: introduce read function for x86_pmu
Date
From: Kan Liang <kan.liang@linux.intel.com>

Large PEBS needs to be specially handled in event count read.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
arch/x86/events/core.c | 2 ++
arch/x86/events/perf_event.h | 1 +
2 files changed, 3 insertions(+)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 140d332..acd7ffc 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1884,6 +1884,8 @@ 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 8e4ea143..805400b 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -519,6 +519,7 @@ 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
\
 
 \ /
  Last update: 2018-01-29 17:33    [W:0.124 / U:1.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site