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Problems with Top-down Microarchitecture Analysis Method

Xueqi_L_ — Thu, 28 Jan 2016 13:52:00 GMT

I'm trying to analyse an execution on an Intel IvyBridge CPU (Xeon E5-2620 V2) with the Top-down Microarchitecture Analysis Method, described in Chapters B of the Intel® 64 and IA-32 Architectures Optimization Reference Manual.

Therefore I perform performance counter events measurements with Perf (perf stat -e rNNN), There are some results I don’t understand:

CPU_UNHALTED.TREAD_P(0x003C) < CYCLE_ACTIVITY.STALLS_LDM_PENDING(Event A3H, Umask 06H)

I can not understand which it means?

CYCLE_ACTIVITY.CYCLES_L2_PENDING > CYCLE_ACTIVITY.CYCLES_L1D_PENDING and CYCLE_ACTIVITY.STALLS_L2_PENDING > CYCLE_ACTIVITY.STALLS_L1D_PENDING

Did you run amplxe-cl without

Peter_W_Intel — Fri, 29 Jan 2016 03:19:58 GMT

Did you run amplxe-cl without vtune drivers, I meant that you collected data with Perf via amplxe-cl?

Regarding that you have Perf performance data, you may visit Perf forum for questions. If you collected VTune performance data, please attach your vtune's result directory for investigating. Thank you.

Thank you for your reply.

Xueqi_L_ — Fri, 29 Jan 2016 09:32:44 GMT

Thank you for your reply. Vtune(Intel(R) VTune(TM) Amplifier XE 2016 Update 1 (build 434111)) works well with small dataset and report the right result, however, I need to profiling a long duration program, I set the command like this: amplxe-cl -collect general-exploration -r r000 -target-duration-type=long -data-limit=2000, but when the collection stops, I use amplxe-cl -report summary -r r000, the error is that amplxe: Executing actions 14 % Loading 'systemcollector-43347-sm197.sc' file(core dump). For this reason, I swithch to perf.

Could you help me to solve the problem ' amplxe-cl -report summary -r r000, the error is that amplxe: Executing actions 14 % Loading 'systemcollector-43347-sm197.sc' file(core dump) '

Thank you very much :-)

Xueqi_L_ — Fri, 29 Jan 2016 13:23:37 GMT

Could you help me to solve the problem ' amplxe-cl -report summary -r r000, the error is that amplxe: Executing actions 14 % Loading 'systemcollector-43347-sm197.sc' file(core dump) '

Thank you very much :-)

Peter Wang wrote:

Did you run amplxe-cl without vtune drivers, I meant that you collected data with Perf via amplxe-cl?

Regarding that you have Perf performance data, you may visit Perf forum for questions. If you collected VTune performance data, please attach your vtune's result directory for investigating. Thank you.

Thank you for update. We will

Peter_W_Intel — Sat, 30 Jan 2016 00:41:29 GMT

Thank you for update. We will work on other thread you created for long run application.