topic On Intel you have MEM_UOPS in Software Tuning, Performance Optimization & Platform Monitoring

Counting MFENCE events with performance counters

Tim_M_1 — Fri, 31 Oct 2014 13:53:14 GMT

Hi All,

I'm wondering if there is a performance counter for retired MFENCE instructions or perhaps another counter that could provide something similar. I've googled a bit, and it looks like AMD has such a counter but I've seen nothing for Intel. Ditto on lock prefix instructions...I haven't seen anything for those either.

Thanks for the help!

Tim

On Intel you have MEM_UOPS

Roman_D_Intel — Fri, 31 Oct 2014 15:11:59 GMT

On Intel you have MEM_UOPS_RETIRED.LOCK_LOADS/MEM_UOPS_RETIRED.LOCK_STORES events. However they work best with disabled Hyper-Threading.

Roman

Thanks Roman, what about for

Tim_M_1 — Fri, 31 Oct 2014 16:26:12 GMT

Thanks Roman, what about for memory fences?

I am not aware of FENCE

Roman_D_Intel — Wed, 26 Nov 2014 13:12:04 GMT

I am not aware of FENCE events.

Roman