linux-kernel - [PATCH v2 6/7] perf, x86: enable large PEBS interrupt threshold for SNB/IVB/HSW

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Message-Id: <1405414739-31455-7-git-send-email-zheng.z.yan@intel.com>
Date:	Tue, 15 Jul 2014 16:58:58 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	a.p.zijlstra@...llo.nl, mingo@...nel.org, acme@...radead.org,
	eranian@...gle.com, andi@...stfloor.org,
	"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: [PATCH v2 6/7] perf, x86: enable large PEBS interrupt threshold for SNB/IVB/HSW

Signed-off-by: Yan, Zheng <zheng.z.yan@...el.com>
---
 arch/x86/kernel/cpu/perf_event_intel.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index cb5a838..dba03b3 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -2456,6 +2456,7 @@ __init int intel_pmu_init(void)
 		intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] =
 			X86_CONFIG(.event=0xb1, .umask=0x01, .inv=1, .cmask=1);
 
+		x86_pmu.multi_pebs = true;
 		pr_cont("SandyBridge events, ");
 		break;
 	case 58: /* IvyBridge */
@@ -2484,6 +2485,7 @@ __init int intel_pmu_init(void)
 		intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] =
 			X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1);
 
+		x86_pmu.multi_pebs = true;
 		pr_cont("IvyBridge events, ");
 		break;
 
@@ -2511,6 +2513,8 @@ __init int intel_pmu_init(void)
 		x86_pmu.get_event_constraints = hsw_get_event_constraints;
 		x86_pmu.cpu_events = hsw_events_attrs;
 		x86_pmu.lbr_double_abort = true;
+
+		x86_pmu.multi_pebs = true;
 		pr_cont("Haswell events, ");
 		break;
 
-- 
1.9.3

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