https://community.intel.com/t5/Software-Tuning-Performance/Problems-with-Top-down-Microarchitecture-Analysis-Method/m-p/1107040#M5965 <P style="word-wrap: break-word; font-size: 12px;">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&nbsp;<A href="http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-optimization-manual.html">Intel® 64 and IA-32 Architectures Optimization Reference Manual</A>.&nbsp;</P> <P style="word-wrap: break-word; font-size: 12px;">Therefore I perform performance counter events measurements with Perf (perf stat -e rNNN), There are some results I don’t understand:</P> <OL style="color: rgb(96, 96, 96);"> <LI> <P style="word-wrap: break-word; font-size: 12px; color: rgb(83, 87, 94);">CPU_UNHALTED.TREAD_P(0x003C)&nbsp;&lt;&nbsp;CYCLE_ACTIVITY.STALLS_LDM_PENDING(Event A3H, Umask 06H)</P> </LI> </OL> <P style="word-wrap: break-word; font-size: 12px;">&nbsp; &nbsp; &nbsp; &nbsp;I can not understand which it means?</P> <OL style="color: rgb(96, 96, 96);"> <LI>CYCLE_ACTIVITY.CYCLES_L2_PENDING&nbsp;&gt;&nbsp;CYCLE_ACTIVITY.CYCLES_L1D_PENDING&nbsp;and&nbsp;CYCLE_ACTIVITY.STALLS_L2_PENDING&nbsp;&gt;&nbsp;CYCLE_ACTIVITY.STALLS_L1D_PENDING</LI> </OL> Thu, 28 Jan 2016 13:57:53 GMT Xueqi_L_ 2016-01-28T13:57:53Z https://community.intel.com/t5/Software-Tuning-Performance/Problems-with-Top-down-Microarchitecture-Analysis-Method/m-p/1107040#M5965 <P style="word-wrap: break-word; font-size: 12px;">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&nbsp;<A href="http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-optimization-manual.html">Intel® 64 and IA-32 Architectures Optimization Reference Manual</A>.&nbsp;</P> <P style="word-wrap: break-word; font-size: 12px;">Therefore I perform performance counter events measurements with Perf (perf stat -e rNNN), There are some results I don’t understand:</P> <OL style="color: rgb(96, 96, 96);"> <LI> <P style="word-wrap: break-word; font-size: 12px; color: rgb(83, 87, 94);">CPU_UNHALTED.TREAD_P(0x003C)&nbsp;&lt;&nbsp;CYCLE_ACTIVITY.STALLS_LDM_PENDING(Event A3H, Umask 06H)</P> </LI> </OL> <P style="word-wrap: break-word; font-size: 12px;">&nbsp; &nbsp; &nbsp; &nbsp;I can not understand which it means?</P> <OL style="color: rgb(96, 96, 96);"> <LI>CYCLE_ACTIVITY.CYCLES_L2_PENDING&nbsp;&gt;&nbsp;CYCLE_ACTIVITY.CYCLES_L1D_PENDING&nbsp;and&nbsp;CYCLE_ACTIVITY.STALLS_L2_PENDING&nbsp;&gt;&nbsp;CYCLE_ACTIVITY.STALLS_L1D_PENDING</LI> </OL> Thu, 28 Jan 2016 13:57:53 GMT https://community.intel.com/t5/Software-Tuning-Performance/Problems-with-Top-down-Microarchitecture-Analysis-Method/m-p/1107040#M5965 Xueqi_L_ 2016-01-28T13:57:53Z