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Date:	Mon, 7 Jul 2014 07:51:40 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] perf, x86: Revamp PEBS event selection

On Wed, Jul 2, 2014 at 8:10 PM, Andi Kleen <ak@...ux.intel.com> wrote:
> On Wed, Jul 02, 2014 at 06:07:31PM +0200, Stephane Eranian wrote:
>> On Wed, Jul 2, 2014 at 5:48 PM, Andi Kleen <ak@...ux.intel.com> wrote:
>> > On Wed, Jul 02, 2014 at 05:44:05PM +0200, Stephane Eranian wrote:
>> >> On Wed, Jul 2, 2014 at 5:33 PM, Andi Kleen <ak@...ux.intel.com> wrote:
>> >> >> No, still needs to be INTEL_ALL_EVENT_CONSTRAINT(0x0, 0x1)
>> >> >> otherwise the get_event_constraint() test I mentioned previously will
>> >> >> fail, event with your ALL_FILTER mask.
>> >> >
>> >> > What events should fail? I verified all PEBS events and they work as expected.
>> >> >
>> >> Random events should not fail, they should go with precise and not generate
>> >> any samples. That's the whole point of the exercise.
>> >>
>> >> perf record -a -e r6099:p sleep 1
>> >
>> > Like I said I ran all PEBS events and they generated samples.
>> >
>> I understand. I ran some random events to make sure I was not
>> getting PEBS samples and the system was stable.
>
> Not sure we're talking about the same thing. You claimed my patch
> wouldn't let any PEBS events through, but the test results
> disagree with that.
>
I did not say that. I said, it does not let any random event code
use precise > 0. And this is what we want to eliminate. It is
okay to let precise > 1 on any event. The non-PEBS events
will not generate any PEBS records.


> I fixed the broken store events you pointed out.
>
> INST_RETIRED.PREC_DIST
> cpu/event=0xC0,umask=0x01,name=INST_RETIRED_PREC_DIST/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.179 MB perf.data (~7821 samples) ]
> UOPS_RETIRED.ALL
> cpu/event=0xC2,umask=0x01,name=UOPS_RETIRED_ALL/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.179 MB perf.data (~7824 samples) ]
> UOPS_RETIRED.RETIRE_SLOTS
> cpu/event=0xC2,umask=0x02,name=UOPS_RETIRED_RETIRE_SLOTS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.180 MB perf.data (~7869 samples) ]
> BR_INST_RETIRED.CONDITIONAL
> cpu/event=0xC4,umask=0x01,name=BR_INST_RETIRED_CONDITIONAL/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.177 MB perf.data (~7729 samples) ]
> BR_INST_RETIRED.NEAR_CALL
> cpu/event=0xC4,umask=0x02,name=BR_INST_RETIRED_NEAR_CALL/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.140 MB perf.data (~6112 samples) ]
> BR_INST_RETIRED.NEAR_RETURN
> cpu/event=0xC4,umask=0x08,name=BR_INST_RETIRED_NEAR_RETURN/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.140 MB perf.data (~6124 samples) ]
> BR_INST_RETIRED.NEAR_TAKEN
> cpu/event=0xC4,umask=0x20,name=BR_INST_RETIRED_NEAR_TAKEN/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.176 MB perf.data (~7709 samples) ]
> BR_INST_RETIRED.ALL_BRANCHES_PEBS
> cpu/event=0xC4,umask=0x04,name=BR_INST_RETIRED_ALL_BRANCHES_PEBS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.177 MB perf.data (~7747 samples) ]
> BR_MISP_RETIRED.CONDITIONAL
> cpu/event=0xC5,umask=0x01,name=BR_MISP_RETIRED_CONDITIONAL/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.132 MB perf.data (~5767 samples) ]
> BR_MISP_RETIRED.ALL_BRANCHES_PEBS
> cpu/event=0xC5,umask=0x04,name=BR_MISP_RETIRED_ALL_BRANCHES_PEBS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.132 MB perf.data (~5781 samples) ]
> HLE_RETIRED.ABORTED
> cpu/event=0xc8,umask=0x04,name=HLE_RETIRED_ABORTED/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.002 MB perf.data (~86 samples) ]
> RTM_RETIRED.ABORTED
> cpu/event=0xc9,umask=0x04,name=RTM_RETIRED_ABORTED/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.002 MB perf.data (~86 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_4
> cpu/event=0xCD,umask=0x01,ldlat=0x4,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_4/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.179 MB perf.data (~7832 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_8
> cpu/event=0xCD,umask=0x01,ldlat=0x8,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_8/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.126 MB perf.data (~5522 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_16
> cpu/event=0xCD,umask=0x01,ldlat=0x10,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_16/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.090 MB perf.data (~3911 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_32
> cpu/event=0xCD,umask=0x01,ldlat=0x20,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_32/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.056 MB perf.data (~2429 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_64
> cpu/event=0xCD,umask=0x01,ldlat=0x40,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_64/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.012 MB perf.data (~516 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_128
> cpu/event=0xCD,umask=0x01,ldlat=0x80,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_128/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.014 MB perf.data (~604 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_256
> cpu/event=0xCD,umask=0x01,ldlat=0x100,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_256/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.004 MB perf.data (~172 samples) ]
> MEM_TRANS_RETIRED.LOAD_LATENCY_GT_512
> cpu/event=0xCD,umask=0x01,ldlat=0x200,name=MEM_TRANS_RETIRED_LOAD_LATENCY_GT_512/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.003 MB perf.data (~129 samples) ]
> MEM_UOPS_RETIRED.STLB_MISS_LOADS
> cpu/event=0xD0,umask=0x11,name=MEM_UOPS_RETIRED_STLB_MISS_LOADS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.006 MB perf.data (~261 samples) ]
> MEM_UOPS_RETIRED.STLB_MISS_STORES
> cpu/event=0xD0,umask=0x12,name=MEM_UOPS_RETIRED_STLB_MISS_STORES/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.016 MB perf.data (~694 samples) ]
> MEM_UOPS_RETIRED.LOCK_LOADS
> cpu/event=0xD0,umask=0x21,name=MEM_UOPS_RETIRED_LOCK_LOADS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.036 MB perf.data (~1554 samples) ]
> MEM_UOPS_RETIRED.SPLIT_LOADS
> cpu/event=0xD0,umask=0x41,name=MEM_UOPS_RETIRED_SPLIT_LOADS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.003 MB perf.data (~121 samples) ]
> MEM_UOPS_RETIRED.SPLIT_STORES
> cpu/event=0xD0,umask=0x42,name=MEM_UOPS_RETIRED_SPLIT_STORES/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.039 MB perf.data (~1707 samples) ]
> MEM_UOPS_RETIRED.ALL_LOADS
> cpu/event=0xD0,umask=0x81,name=MEM_UOPS_RETIRED_ALL_LOADS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.179 MB perf.data (~7839 samples) ]
> MEM_UOPS_RETIRED.ALL_STORES
> cpu/event=0xD0,umask=0x82,name=MEM_UOPS_RETIRED_ALL_STORES/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.164 MB perf.data (~7144 samples) ]
> MEM_LOAD_UOPS_RETIRED.L1_HIT
> cpu/event=0xD1,umask=0x01,name=MEM_LOAD_UOPS_RETIRED_L1_HIT/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.179 MB perf.data (~7826 samples) ]
> MEM_LOAD_UOPS_RETIRED.L2_HIT
> cpu/event=0xD1,umask=0x02,name=MEM_LOAD_UOPS_RETIRED_L2_HIT/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.084 MB perf.data (~3689 samples) ]
> MEM_LOAD_UOPS_RETIRED.L3_HIT
> cpu/event=0xD1,umask=0x04,name=MEM_LOAD_UOPS_RETIRED_L3_HIT/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.041 MB perf.data (~1779 samples) ]
> MEM_LOAD_UOPS_RETIRED.L1_MISS
> cpu/event=0xD1,umask=0x08,name=MEM_LOAD_UOPS_RETIRED_L1_MISS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.088 MB perf.data (~3827 samples) ]
> MEM_LOAD_UOPS_RETIRED.L2_MISS
> cpu/event=0xD1,umask=0x10,name=MEM_LOAD_UOPS_RETIRED_L2_MISS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.056 MB perf.data (~2439 samples) ]
> MEM_LOAD_UOPS_RETIRED.L3_MISS
> cpu/event=0xD1,umask=0x20,name=MEM_LOAD_UOPS_RETIRED_L3_MISS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.028 MB perf.data (~1229 samples) ]
> MEM_LOAD_UOPS_RETIRED.HIT_LFB
> cpu/event=0xD1,umask=0x40,name=MEM_LOAD_UOPS_RETIRED_HIT_LFB/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.055 MB perf.data (~2402 samples) ]
> MEM_LOAD_UOPS_L3_HIT_RETIRED.XSNP_MISS
> cpu/event=0xD2,umask=0x01,name=MEM_LOAD_UOPS_L3_HIT_RETIRED_XSNP_MISS/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.002 MB perf.data (~107 samples) ]
> MEM_LOAD_UOPS_L3_HIT_RETIRED.XSNP_HIT
> cpu/event=0xD2,umask=0x02,name=MEM_LOAD_UOPS_L3_HIT_RETIRED_XSNP_HIT/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.003 MB perf.data (~119 samples) ]
> MEM_LOAD_UOPS_L3_HIT_RETIRED.XSNP_HITM
> cpu/event=0xD2,umask=0x04,name=MEM_LOAD_UOPS_L3_HIT_RETIRED_XSNP_HITM/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.002 MB perf.data (~107 samples) ]
> MEM_LOAD_UOPS_L3_HIT_RETIRED.XSNP_NONE
> cpu/event=0xD2,umask=0x08,name=MEM_LOAD_UOPS_L3_HIT_RETIRED_XSNP_NONE/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.038 MB perf.data (~1649 samples) ]
> MEM_LOAD_UOPS_L3_MISS_RETIRED.LOCAL_DRAM
> cpu/event=0xD3,umask=0x01,name=MEM_LOAD_UOPS_L3_MISS_RETIRED_LOCAL_DRAM/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.028 MB perf.data (~1204 samples) ]
> BR_MISP_RETIRED.NEAR_TAKEN
> cpu/event=0xC5,umask=0x20,name=BR_MISP_RETIRED_NEAR_TAKEN/pp
> [ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.132 MB perf.data (~5777 samples) ]
>
> --
> ak@...ux.intel.com -- Speaking for myself only
--
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