From: kan.liang@linux.intel.com
To: peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org
Cc: acme@kernel.org, tglx@linutronix.de, jolsa@redhat.com,
eranian@google.com, ak@linux.intel.com,
Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH V4 4/5] perf/x86/intel: Fix pmu read for auto-reload
Date: Mon, 12 Feb 2018 14:20:34 -0800 [thread overview]
Message-ID: <1518474035-21006-5-git-send-email-kan.liang@linux.intel.com> (raw)
In-Reply-To: <1518474035-21006-1-git-send-email-kan.liang@linux.intel.com>
From: Kan Liang <kan.liang@linux.intel.com>
Auto-reload event needs to be specially handled in event count read.
Auto-reload is only available for intel_pmu.
Fixes: b8241d20699e ("perf/x86/intel: Implement batched PEBS interrupt
handling (large PEBS interrupt threshold)")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
arch/x86/events/intel/core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 731153a..6461a4a 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -2060,6 +2060,14 @@ static void intel_pmu_del_event(struct perf_event *event)
intel_pmu_pebs_del(event);
}
+static void intel_pmu_read_event(struct perf_event *event)
+{
+ if (event->hw.flags & PERF_X86_EVENT_AUTO_RELOAD)
+ intel_pmu_auto_reload_read(event);
+ else
+ x86_perf_event_update(event);
+}
+
static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
{
int idx = hwc->idx - INTEL_PMC_IDX_FIXED;
@@ -3495,6 +3503,7 @@ static __initconst const struct x86_pmu intel_pmu = {
.disable = intel_pmu_disable_event,
.add = intel_pmu_add_event,
.del = intel_pmu_del_event,
+ .read = intel_pmu_read_event,
.hw_config = intel_pmu_hw_config,
.schedule_events = x86_schedule_events,
.eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
--
2.7.4
next prev parent reply other threads:[~2018-02-12 22:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-12 22:20 [PATCH V4 0/5] bugs fix for auto-reload mmap read and rdpmc read kan.liang
2018-02-12 22:20 ` [PATCH V4 1/5] perf/x86/intel: Fix event update for auto-reload kan.liang
2018-02-17 6:21 ` [perf/x86/intel] 41e062cd2e: WARNING:at_arch/x86/events/intel/ds.c:#intel_pmu_save_and_restart_reload kernel test robot
2018-02-19 12:44 ` Peter Zijlstra
2018-02-20 18:59 ` Liang, Kan
2018-03-09 9:08 ` [tip:perf/core] perf/x86/intel: Properly save/restore the PMU state in the NMI handler tip-bot for Kan Liang
2018-02-21 10:32 ` [PATCH V4 1/5] perf/x86/intel: Fix event update for auto-reload Peter Zijlstra
2018-02-21 13:43 ` Liang, Kan
2018-02-21 13:45 ` Peter Zijlstra
2018-03-09 9:08 ` [tip:perf/core] " tip-bot for Kan Liang
2018-02-12 22:20 ` [PATCH V4 2/5] perf/x86: Introduce read function for x86_pmu kan.liang
2018-03-09 9:09 ` [tip:perf/core] perf/x86: Introduce a ->read() callback in 'struct x86_pmu' tip-bot for Kan Liang
2018-02-12 22:20 ` [PATCH V4 3/5] perf/x86/intel/ds: Introduce read function for auto-reload event kan.liang
2018-03-09 9:09 ` [tip:perf/core] perf/x86/intel/ds: Introduce ->read() function for auto-reload events and flush the PEBS buffer there tip-bot for Kan Liang
2018-02-12 22:20 ` kan.liang [this message]
2018-03-09 9:10 ` [tip:perf/core] perf/x86/intel: Fix PMU read for auto-reload tip-bot for Kan Liang
2018-02-12 22:20 ` [PATCH V4 5/5] perf/x86: Fix: disable userspace RDPMC usage for large PEBS kan.liang
2018-03-09 9:10 ` [tip:perf/core] perf/x86/intel: Disable " tip-bot for Kan Liang
2018-03-09 14:31 ` Vince Weaver
2018-03-09 17:42 ` Peter Zijlstra
2018-03-09 18:53 ` Liang, Kan
2018-03-09 19:10 ` Vince Weaver
2018-03-12 14:08 ` Liang, Kan
2018-03-20 11:15 ` [tip:perf/urgent] " tip-bot for Kan Liang
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