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Date: Thu, 03 Mar 2011 08:50:31 +0800
From: Lin Ming <ming.m.lin@...el.com>
To: Stephane Eranian <eranian@...gle.com>
Cc: Ingo Molnar <mingo@...e.hu>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andi Kleen <andi@...stfloor.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 -tip/perf/urgent] perf: x86, add SandyBridge support
On Wed, 2011-03-02 at 22:17 +0800, Stephane Eranian wrote:
> On Wed, Mar 2, 2011 at 2:27 PM, Lin Ming <ming.m.lin@...el.com> wrote:
> > This patch adds basic SandyBridge support, including hardware cache
> > events and PEBS events support.
> >
> > v2 -> v3:
> > - fix PEBS event 0xd0 with right umask combinations
> > - move snb pebs constraint assignment to intel_pmu_init
> >
> > v1 -> v2:
> > - add more raw and PEBS events constraints
> > - use offcore events for LLC-* cache events
> > - remove the call to Nehalem workaround enable_all function
> >
> > Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> > ---
> > arch/x86/kernel/cpu/perf_event.c | 4 +-
> > arch/x86/kernel/cpu/perf_event_intel.c | 124 +++++++++++++++++++++++++++++
> > arch/x86/kernel/cpu/perf_event_intel_ds.c | 38 +++++++++
> > 3 files changed, 165 insertions(+), 1 deletions(-)
> >
> > diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
> > index 9d977a2..390fa6d 100644
> > --- a/arch/x86/kernel/cpu/perf_event.c
> > +++ b/arch/x86/kernel/cpu/perf_event.c
> > @@ -166,8 +166,10 @@ struct cpu_hw_events {
> > /*
> > * Constraint on the Event code + UMask
> > */
> > -#define PEBS_EVENT_CONSTRAINT(c, n) \
> > +#define INTEL_UEVENT_CONSTRAINT(c, n) \
> > EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
> > +#define PEBS_EVENT_CONSTRAINT(c, n) \
> > + INTEL_UEVENT_CONSTRAINT(c, n)
> >
> > #define EVENT_CONSTRAINT_END \
> > EVENT_CONSTRAINT(0, 0, 0)
> > diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
> > index 008835c..d00f386 100644
> > --- a/arch/x86/kernel/cpu/perf_event_intel.c
> > +++ b/arch/x86/kernel/cpu/perf_event_intel.c
> > @@ -76,6 +76,19 @@ static struct event_constraint intel_westmere_event_constraints[] =
> > EVENT_CONSTRAINT_END
> > };
> >
> > +static struct event_constraint intel_snb_event_constraints[] =
> > +{
> > + FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> > + FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
> > + /* FIXED_EVENT_CONSTRAINT(0x013c, 2), CPU_CLK_UNHALTED.REF */
> > + INTEL_EVENT_CONSTRAINT(0x48, 0x4), /* L1D_PEND_MISS.PENDING */
> > + INTEL_EVENT_CONSTRAINT(0xb7, 0x1), /* OFF_CORE_RESPONSE_0 */
> > + INTEL_EVENT_CONSTRAINT(0xbb, 0x8), /* OFF_CORE_RESPONSE_1 */
> > + INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
> > + INTEL_EVENT_CONSTRAINT(0xcd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
> > + EVENT_CONSTRAINT_END
> > +};
> > +
> > static struct event_constraint intel_gen_event_constraints[] =
> > {
> > FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> > @@ -89,6 +102,106 @@ static u64 intel_pmu_event_map(int hw_event)
> > return intel_perfmon_event_map[hw_event];
> > }
> >
> > +static __initconst const u64 snb_hw_cache_event_ids
> > + [PERF_COUNT_HW_CACHE_MAX]
> > + [PERF_COUNT_HW_CACHE_OP_MAX]
> > + [PERF_COUNT_HW_CACHE_RESULT_MAX] =
> > +{
> > + [ C(L1D) ] = {
> > + [ C(OP_READ) ] = {
> > + [ C(RESULT_ACCESS) ] = 0xf1d0, /* MEM_UOP_RETIRED.LOADS */
> > + [ C(RESULT_MISS) ] = 0x0151, /* L1D.REPLACEMENT */
> > + },
> > + [ C(OP_WRITE) ] = {
> > + [ C(RESULT_ACCESS) ] = 0xf2d0, /* MEM_UOP_RETIRED.STORES */
> > + [ C(RESULT_MISS) ] = 0x0851, /* L1D.ALL_M_REPLACEMENT */
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x0,
> > + [ C(RESULT_MISS) ] = 0x024e, /* HW_PRE_REQ.DL1_MISS */
> > + },
> > + },
> > + [ C(L1I ) ] = {
> > + [ C(OP_READ) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x0,
> > + [ C(RESULT_MISS) ] = 0x0280, /* ICACHE.MISSES */
> > + },
> > + [ C(OP_WRITE) ] = {
> > + [ C(RESULT_ACCESS) ] = -1,
> > + [ C(RESULT_MISS) ] = -1,
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x0,
> > + [ C(RESULT_MISS) ] = 0x0,
> > + },
> > + },
> > + [ C(LL ) ] = {
> > + /*
> > + * TBD: Need Off-core Response Performance Monitoring support
> > + */
> > + [ C(OP_READ) ] = {
> > + /* OFFCORE_RESPONSE_0.ANY_DATA.LOCAL_CACHE */
> > + [ C(RESULT_ACCESS) ] = 0x01b7,
> > + /* OFFCORE_RESPONSE_1.ANY_DATA.ANY_LLC_MISS */
> > + [ C(RESULT_MISS) ] = 0x01bb,
> > + },
> > + [ C(OP_WRITE) ] = {
> > + /* OFFCORE_RESPONSE_0.ANY_RFO.LOCAL_CACHE */
> > + [ C(RESULT_ACCESS) ] = 0x01b7,
> > + /* OFFCORE_RESPONSE_1.ANY_RFO.ANY_LLC_MISS */
> > + [ C(RESULT_MISS) ] = 0x01bb,
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + /* OFFCORE_RESPONSE_0.PREFETCH.LOCAL_CACHE */
> > + [ C(RESULT_ACCESS) ] = 0x01b7,
> > + /* OFFCORE_RESPONSE_1.PREFETCH.ANY_LLC_MISS */
> > + [ C(RESULT_MISS) ] = 0x01bb,
> > + },
> > + },
> > + [ C(DTLB) ] = {
> > + [ C(OP_READ) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x81d0, /* MEM_UOP_RETIRED.ALL_LOADS */
> > + [ C(RESULT_MISS) ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
> > + },
> > + [ C(OP_WRITE) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x82d0, /* MEM_UOP_RETIRED.ALL_STORES */
> > + [ C(RESULT_MISS) ] = 0x0149, /* DTLB_STORE_MISSES.MISS_CAUSES_A_WALK */
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x0,
> > + [ C(RESULT_MISS) ] = 0x0,
> > + },
> > + },
> > + [ C(ITLB) ] = {
> > + [ C(OP_READ) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x1085, /* ITLB_MISSES.STLB_HIT */
> > + [ C(RESULT_MISS) ] = 0x0185, /* ITLB_MISSES.CAUSES_A_WALK */
> > + },
> > + [ C(OP_WRITE) ] = {
> > + [ C(RESULT_ACCESS) ] = -1,
> > + [ C(RESULT_MISS) ] = -1,
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + [ C(RESULT_ACCESS) ] = -1,
> > + [ C(RESULT_MISS) ] = -1,
> > + },
> > + },
> > + [ C(BPU ) ] = {
> > + [ C(OP_READ) ] = {
> > + [ C(RESULT_ACCESS) ] = 0x00c4, /* BR_INST_RETIRED.ALL_BRANCHES */
> > + [ C(RESULT_MISS) ] = 0x00c5, /* BR_MISP_RETIRED.ALL_BRANCHES */
> > + },
> > + [ C(OP_WRITE) ] = {
> > + [ C(RESULT_ACCESS) ] = -1,
> > + [ C(RESULT_MISS) ] = -1,
> > + },
> > + [ C(OP_PREFETCH) ] = {
> > + [ C(RESULT_ACCESS) ] = -1,
> > + [ C(RESULT_MISS) ] = -1,
> > + },
> > + },
> > +};
> > +
> > static __initconst const u64 westmere_hw_cache_event_ids
> > [PERF_COUNT_HW_CACHE_MAX]
> > [PERF_COUNT_HW_CACHE_OP_MAX]
> > @@ -1062,6 +1175,17 @@ static __init int intel_pmu_init(void)
> > pr_cont("Westmere events, ");
> > break;
> >
> > + case 42: /* SandyBridge */
> > + memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
> > + sizeof(hw_cache_event_ids));
> > +
> > + intel_pmu_lbr_init_nhm();
> > +
> > + x86_pmu.event_constraints = intel_snb_event_constraints;
> > + x86_pmu.pebs_constraints = intel_snb_pebs_events;
> > + pr_cont("SandyBridge events, ");
> > + break;
> > +
> > default:
> > /*
> > * default constraints for v2 and up
> > diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> > index b7dcd9f..8251998 100644
> > --- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
> > +++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
> > @@ -388,6 +388,44 @@ static struct event_constraint intel_nehalem_pebs_events[] = {
> > EVENT_CONSTRAINT_END
> > };
> >
> > +static struct event_constraint intel_snb_pebs_events[] = {
> > + PEBS_EVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PRECDIST */
> > + PEBS_EVENT_CONSTRAINT(0x01c2, 0xf), /* UOPS_RETIRED.ALL */
> > + PEBS_EVENT_CONSTRAINT(0x02c2, 0xf), /* UOPS_RETIRED.RETIRE_SLOTS */
> > + PEBS_EVENT_CONSTRAINT(0x01c4, 0xf), /* BR_INST_RETIRED.CONDITIONAL */
> > + PEBS_EVENT_CONSTRAINT(0x02c4, 0xf), /* BR_INST_RETIRED.NEAR_CALL */
> > + PEBS_EVENT_CONSTRAINT(0x04c4, 0xf), /* BR_INST_RETIRED.ALL_BRANCHES */
> > + PEBS_EVENT_CONSTRAINT(0x08c4, 0xf), /* BR_INST_RETIRED.NEAR_RETURN */
> > + PEBS_EVENT_CONSTRAINT(0x10c4, 0xf), /* BR_INST_RETIRED.NOT_TAKEN */
> > + PEBS_EVENT_CONSTRAINT(0x20c4, 0xf), /* BR_INST_RETIRED.NEAR_TAKEN */
> > + PEBS_EVENT_CONSTRAINT(0x40c4, 0xf), /* BR_INST_RETIRED.FAR_BRANCH */
> > + PEBS_EVENT_CONSTRAINT(0x01c5, 0xf), /* BR_MISP_RETIRED.CONDITIONAL */
> > + PEBS_EVENT_CONSTRAINT(0x02c5, 0xf), /* BR_MISP_RETIRED.NEAR_CALL */
> > + PEBS_EVENT_CONSTRAINT(0x04c5, 0xf), /* BR_MISP_RETIRED.ALL_BRANCHES */
> > + PEBS_EVENT_CONSTRAINT(0x10c5, 0xf), /* BR_MISP_RETIRED.NOT_TAKEN */
> > + PEBS_EVENT_CONSTRAINT(0x20c5, 0xf), /* BR_MISP_RETIRED.TAKEN */
> > + PEBS_EVENT_CONSTRAINT(0x01cd, 0x8), /* MEM_TRANS_RETIRED.LOAD_LATENCY */
> > + PEBS_EVENT_CONSTRAINT(0x02cd, 0x8), /* MEM_TRANS_RETIRED.PRECISE_STORE */
> > + PEBS_EVENT_CONSTRAINT(0x11d0, 0xf), /* MEM_UOP_RETIRED.STLB_MISS_LOADS */
> > + PEBS_EVENT_CONSTRAINT(0x12d0, 0xf), /* MEM_UOP_RETIRED.STLB_MISS_STORES */
> > + PEBS_EVENT_CONSTRAINT(0x21d0, 0xf), /* MEM_UOP_RETIRED.LOCK_LOADS */
> > + PEBS_EVENT_CONSTRAINT(0x22d0, 0xf), /* MEM_UOP_RETIRED.LOCK_STORES */
> > + PEBS_EVENT_CONSTRAINT(0x41d0, 0xf), /* MEM_UOP_RETIRED.SPLIT_LOADS */
> > + PEBS_EVENT_CONSTRAINT(0x42d0, 0xf), /* MEM_UOP_RETIRED.SPLIT_STORES */
> > + PEBS_EVENT_CONSTRAINT(0x81d0, 0xf), /* MEM_UOP_RETIRED.ANY_LOADS */
> > + PEBS_EVENT_CONSTRAINT(0x82d0, 0xf), /* MEM_UOP_RETIRED.ANY_STORES */
> > + PEBS_EVENT_CONSTRAINT(0x01d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L1_HIT */
> > + PEBS_EVENT_CONSTRAINT(0x02d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.L2_HIT */
> > + PEBS_EVENT_CONSTRAINT(0x04d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.LLC_HIT */
> > + PEBS_EVENT_CONSTRAINT(0x40d1, 0xf), /* MEM_LOAD_UOPS_RETIRED.HIT_LFB */
> > + PEBS_EVENT_CONSTRAINT(0x01d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_MISS */
> > + PEBS_EVENT_CONSTRAINT(0x02d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_HIT */
> > + PEBS_EVENT_CONSTRAINT(0x04d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_HITM */
> > + PEBS_EVENT_CONSTRAINT(0x08d2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.XSNP_NONE */
> > + PEBS_EVENT_CONSTRAINT(0x02d4, 0xf), /* MEM_LOAD_UOPS_MISC_RETIRED.LLC_MISS */
> > + EVENT_CONSTRAINT_END
> > +};
> > +
> Why didn't you use INTEL_EVENT_CONSTRAINT() for the events where all
> umasks support
> PEBS? This is what I did in my PEBS patch.
OK, will do it in later cleanup patches.
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