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* Re: Perf JSON events mismatch with Intel SDM
       [not found] <CA+eKabDFV0UZ_52jbamj+=cGdD7OSRHMhuFHbni1SkBzRrd57g@mail.gmail.com>
@ 2018-07-16  3:59 ` Andi Kleen
       [not found]   ` <CA+eKabDaAVFR-eeXDaocQQWT=82XouV8fw3zcJ9cos=O7v1W3g@mail.gmail.com>
  0 siblings, 1 reply; 2+ messages in thread
From: Andi Kleen @ 2018-07-16  3:59 UTC (permalink / raw)
  To: Juan
  Cc: peterz, mingo, acme, jolsa, alexander.shishkin, namhyung, linux-kernel

>  now need to dive in deep into the actual implementation. Simple question: is this a bug?

These are derived events from MEM_TRANS_RETIRED.LOAD_LATENCY, which is in
the SDM.  It's not a bug. In general the event lists used by perf are 
newer versions than what is in the SDM.

-Andi

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: Perf JSON events mismatch with Intel SDM
       [not found]   ` <CA+eKabDaAVFR-eeXDaocQQWT=82XouV8fw3zcJ9cos=O7v1W3g@mail.gmail.com>
@ 2018-07-16 15:37     ` Andi Kleen
  0 siblings, 0 replies; 2+ messages in thread
From: Andi Kleen @ 2018-07-16 15:37 UTC (permalink / raw)
  To: Juan
  Cc: peterz, mingo, acme, jolsa, alexander.shishkin, namhyung, linux-kernel

>    The semantic difference being, as far as I can tell, that the "GT"
>    counters do not sample randomly, but will rather offer a precise count of
>    loads meeting the stated condition. 

It's all the same underlying hardware event. The only difference is what threshold
is used for filtering the loads.

-Andi

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2018-07-16 15:38 UTC | newest]

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2018-07-16  3:59 ` Perf JSON events mismatch with Intel SDM Andi Kleen
     [not found]   ` <CA+eKabDaAVFR-eeXDaocQQWT=82XouV8fw3zcJ9cos=O7v1W3g@mail.gmail.com>
2018-07-16 15:37     ` Andi Kleen

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