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Date: Mon, 09 May 2011 16:39:42 +0800
From: Lin Ming <ming.m.lin@...el.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andi Kleen <ak@...ux.intel.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Mike Galbraith <efault@....de>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Frédéric Weisbecker <fweisbec@...il.com>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH] perf events, x86: Implement Sandybridge last-level cache
events
Originally from: Peter Zijlstra <peterz@...radead.org>
Implement Sandybridge last-level cache events with offcore events.
$ ./perf stat -e LLC-loads -e LLC-load-misses \
-e LLC-stores -e LLC-store-misses \
-e LLC-prefetches -e LLC-prefetch-misses \
-- dd if=/dev/zero of=/dev/null
Performance counter stats for 'dd if=/dev/zero of=/dev/null':
21,150 LLC-loads
191 LLC-load-misses
4,749 LLC-stores
1,919 LLC-store-misses
11,584 LLC-prefetches
174 LLC-prefetch-misses
6.155113700 seconds time elapsed
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Lin Ming <ming.m.lin@...el.com>
---
arch/x86/kernel/cpu/perf_event_intel.c | 77 ++++++++++++++++++++++++++++++++
1 files changed, 77 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 41178c8..b39b819 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -137,6 +137,13 @@ static struct event_constraint intel_westmere_percore_constraints[] __read_mostl
EVENT_CONSTRAINT_END
};
+static struct extra_reg intel_snb_extra_regs[] __read_mostly =
+{
+ INTEL_EVENT_EXTRA_REG(0xb7, MSR_OFFCORE_RSP_0, 0x3fffffffff),
+ INTEL_EVENT_EXTRA_REG(0xbb, MSR_OFFCORE_RSP_1, 0x3fffffffff),
+ EVENT_EXTRA_END
+};
+
static struct event_constraint intel_gen_event_constraints[] __read_mostly =
{
FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
@@ -150,6 +157,72 @@ static u64 intel_pmu_event_map(int hw_event)
return intel_perfmon_event_map[hw_event];
}
+/*
+ * Sandy Bridge MSR_OFFCORE_RESPONSE bits;
+ * See IA32 SDM Vol 3B 30.8.5
+ */
+
+#define SNB_DMND_DATA_RD (1ULL << 0)
+#define SNB_DMND_RFO (1ULL << 1)
+#define SNB_DMND_IFETCH (1ULL << 2)
+#define SNB_DMND_WB (1ULL << 3)
+#define SNB_PF_DATA_RD (1ULL << 4)
+#define SNB_PF_DATA_RFO (1ULL << 5)
+#define SNB_PF_IFETCH (1ULL << 6)
+#define SNB_PF_LLC_DATA_RD (1ULL << 7)
+#define SNB_PF_LLC_RFO (1ULL << 8)
+#define SNB_PF_LLC_IFETCH (1ULL << 9)
+#define SNB_BUS_LOCKS (1ULL << 10)
+#define SNB_STRM_ST (1ULL << 11)
+ /* hole */
+#define SNB_OFFCORE_OTHER (1ULL << 15)
+#define SNB_COMMON (1ULL << 16)
+#define SNB_NO_SUPP (1ULL << 17)
+#define SNB_LLC_HITM (1ULL << 18)
+#define SNB_LLC_HITE (1ULL << 19)
+#define SNB_LLC_HITS (1ULL << 20)
+#define SNB_LLC_HITF (1ULL << 21)
+ /* hole */
+#define SNB_SNP_NONE (1ULL << 31)
+#define SNB_SNP_NOT_NEEDED (1ULL << 32)
+#define SNB_SNP_MISS (1ULL << 33)
+#define SNB_SNP_NO_FWD (1ULL << 34)
+#define SNB_SNP_FWD (1ULL << 35)
+#define SNB_HITM (1ULL << 36)
+#define SNB_NON_DRAM (1ULL << 37)
+
+#define SNB_DMND_READ (SNB_DMND_DATA_RD)
+#define SNB_DMND_WRITE (SNB_DMND_RFO | SNB_DMND_WB|SNB_STRM_ST)
+#define SNB_DMND_PREFETCH (SNB_PF_DATA_RD | SNB_PF_DATA_RFO)
+
+#define SNB_SUPPLIER_INFO (SNB_NO_SUPP | SNB_LLC_HITM | SNB_LLC_HITE | \
+ SNB_LLC_HITS | SNB_LLC_HITF)
+
+#define SNB_L3_HIT (SNB_SUPPLIER_INFO | SNB_SNP_NOT_NEEDED | SNB_SNP_NO_FWD | SNB_HITM)
+#define SNB_L3_MISS (SNB_SUPPLIER_INFO | SNB_SNP_MISS | SNB_SNP_FWD | SNB_NON_DRAM)
+#define SNB_L3_ACCESS (SNB_L3_HIT | SNB_L3_MISS)
+
+static __initconst const u64 snb_hw_cache_extra_regs
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = SNB_DMND_READ | SNB_L3_ACCESS,
+ [ C(RESULT_MISS) ] = SNB_DMND_READ | SNB_L3_MISS,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = SNB_DMND_WRITE | SNB_L3_ACCESS,
+ [ C(RESULT_MISS) ] = SNB_DMND_WRITE | SNB_L3_MISS,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = SNB_DMND_PREFETCH | SNB_L3_ACCESS,
+ [ C(RESULT_MISS) ] = SNB_DMND_PREFETCH | SNB_L3_MISS,
+ },
+ }
+};
+
static __initconst const u64 snb_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
@@ -1497,11 +1570,15 @@ static __init int intel_pmu_init(void)
case 42: /* SandyBridge */
memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
+ sizeof(hw_cache_extra_regs));
intel_pmu_lbr_init_nhm();
x86_pmu.event_constraints = intel_snb_event_constraints;
+ x86_pmu.percore_constraints = intel_westmere_percore_constraints;
x86_pmu.pebs_constraints = intel_snb_pebs_events;
+ x86_pmu.extra_regs = intel_snb_extra_regs;
/* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x180010e;
--
1.7.4.4
--
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