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Date: Thu, 24 Feb 2011 17:53:25 +0100
From: Stephane Eranian <eranian@...gle.com>
To: Lin Ming <ming.m.lin@...el.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] perf: x86, add SandyBridge support
Lin,
On Thu, Feb 24, 2011 at 2:59 PM, Lin Ming <ming.m.lin@...el.com> wrote:
> Adds SandyBridge support to perf.
>
> Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> ---
> arch/x86/kernel/cpu/perf_event_intel.c | 111 ++++++++++++++++++++++++++++++++
> 1 files changed, 111 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
> index 084b383..4a132c9 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel.c
> @@ -76,6 +76,15 @@ 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 */
> + EVENT_CONSTRAINT_END
> +};
> +
There are more constraints than these, unfortunately. I have been
trying to get Intel
to make them public...
> static struct event_constraint intel_gen_event_constraints[] =
> {
> FIXED_EVENT_CONSTRAINT(0x00c0, 0), /* INST_RETIRED.ANY */
> @@ -89,6 +98,97 @@ 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 ) ] = {
> + [ C(OP_READ) ] = {
> + [ C(RESULT_ACCESS) ] = 0x04d1, /* MEM_LOAD_UOPS_RETIRED.LLC_HIT */
> + [ C(RESULT_MISS) ] = 0x0,
> + },
> + [ C(OP_WRITE) ] = {
> + [ C(RESULT_ACCESS) ] = 0x0424, /* L2_RQSTS.RFO_HITS */
> + [ C(RESULT_MISS) ] = 0x0824, /* L2_RQSTS.RFO_MISS */
> + },
> + [ C(OP_PREFETCH) ] = {
> + [ C(RESULT_ACCESS) ] = 0x4f2e, /* L3_LAT_CACHE.REFERENCE */
> + [ C(RESULT_MISS) ] = 0x412e, /* L3_LAT_CACHE.MISS */
> + },
> + },
> + [ C(DTLB) ] = {
> + [ C(OP_READ) ] = {
> + [ C(RESULT_ACCESS) ] = 0x01d0, /* MEM_UOP_RETIRED.LOADS */
> + [ C(RESULT_MISS) ] = 0x0108, /* DTLB_LOAD_MISSES.CAUSES_A_WALK */
> + },
> + [ C(OP_WRITE) ] = {
> + [ C(RESULT_ACCESS) ] = 0x02d0, /* MEM_UOP_RETIRED.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 */
> + },Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> + [ 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 +1162,17 @@ 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.enable_all = intel_pmu_nhm_enable_all;
I don't see the errata that would justify using the Nehalem workaround
enable_all
function here.
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