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Server Gurus Discussions

yah
Adept I

maximum number of events

On a dual socket AMD EPYC 7702 64-Core Processor,  how many events can  someone sample at the same time? i'm using 

./AMDuProfCLI-bin. i'm looking at using this program to look at these features:

pmu-events, predefined-events and cacheline-events

 

thanks,

 

YAH

3 Replies
dipak
Staff
Staff

Re: maximum number of events

Thank you for the query. Moving it to the AMD Server Gurus forum which is the right place to post any query/issue related to AMD uProf.

Thanks.

Re: maximum number of events

Hello Yah,

The right way to profile an application using events directly is by using "-e event=eventx".  Know more about this option by -  AMDuProfCLI collect -h. It is suggested that you use fewer events in one profile session - to avoid multiplexing.  Refer chapter 13.2.2 - "Event-Counter Multiplexing" in User_Guide_AMD_uProf_v3.4_GA.

Let me know if you need more information.

Regards,

Santosh

Re: maximum number of events

Example custom profile command : 

AMDuProfCLI collect -e event=PMCx043,umask=0x40 -e event=L1_DTLB_MISSES -e event=L2_DTLB_MISSES -e event=PMCx047 -o $PWD/outputdir ./cmd