https://community.intel.com/t5/Software-Tuning-Performance/Need-help-with-VTune-threading-analysis/m-p/1148525#M6804 <P>I am trying to figure out the % of time spent for context switches in a number of applications and i am using the threading analysis VTune offers.By selecting the hardware event-based sampling and context switches i get what appears to be wrong results(VTune failing to hook correctly?)</P><P>&nbsp;</P><P>Mirrored testing of cinebench R20 on a 6700k.The cpu utilization on hardware event based sampling is low (along with other things that seem wrong unless im missing something).There was no pausing done in that run also.</P><P>Why am i seeing this and what can i do to get the result i am looking for?</P><P>&nbsp;</P><P>The run that correctly displays CPU utilization and more is done using the user mode sampling and tracing option.</P><P><IMG alt="" src="https://i.imgur.com/dhSkWRY.png" /></P><P><IMG alt="" src="https://i.imgur.com/wCxW5iw.png" /><IMG alt="" src="https://i.imgur.com/BUWB78q.png" /></P> Sun, 19 May 2019 00:08:47 GMT meimetis__dimitrios 2019-05-19T00:08:47Z https://community.intel.com/t5/Software-Tuning-Performance/Need-help-with-VTune-threading-analysis/m-p/1148525#M6804 <P>I am trying to figure out the % of time spent for context switches in a number of applications and i am using the threading analysis VTune offers.By selecting the hardware event-based sampling and context switches i get what appears to be wrong results(VTune failing to hook correctly?)</P><P>&nbsp;</P><P>Mirrored testing of cinebench R20 on a 6700k.The cpu utilization on hardware event based sampling is low (along with other things that seem wrong unless im missing something).There was no pausing done in that run also.</P><P>Why am i seeing this and what can i do to get the result i am looking for?</P><P>&nbsp;</P><P>The run that correctly displays CPU utilization and more is done using the user mode sampling and tracing option.</P><P><IMG alt="" src="https://i.imgur.com/dhSkWRY.png" /></P><P><IMG alt="" src="https://i.imgur.com/wCxW5iw.png" /><IMG alt="" src="https://i.imgur.com/BUWB78q.png" /></P> Sun, 19 May 2019 00:08:47 GMT https://community.intel.com/t5/Software-Tuning-Performance/Need-help-with-VTune-threading-analysis/m-p/1148525#M6804 meimetis__dimitrios 2019-05-19T00:08:47Z