CSV output header

[Justin Lee]

Hello, 

I have been working with the timeline mode of likwid-perf, generating a CSV output. However, I am not able to make sense of the csv output as there isn't any csv header present. 

ne way I have been going around this is by combining the csv headers from the .txt file(changing the '|' delimiter to "," at the same time) and insert it on top of the .csv output. However, as a result, not all the columns in the CSV file has a corresponding header. Therefore, is there an easier way for this workflow? Also, how can I get the header field for all the columns?

Best,
Justin Lee

[Thomas Gruber]

Hi,

you are right, the CSV header does not directly describe all columns. You have to combine the "Cores" line with the following "GID..." line as shown in the documentation (https://github.com/RRZE-HPC/likwid/wiki/likwid-perfctr#the-timeline-mode). But, of course, there is is room for improvement in the documentation. I have not used ',' as separator because it might be part of a metric name. The '|' is rarely used in descriptions. The CSV output is somewhat new to for the timeline mode.

Best,
Thomas

[Thomas Gruber]

Just as a note, the CSV header line can be adjusted in

https://github.com/RRZE-HPC/likwid/blob/master/src/applications/likwid-perfctr.lua#L1000-L1021

You could transform it to a loop like:

for e=1, likwid.numberOfEvents(gid) do

   for c=1, #clist do

       table.insert(strlist, string.format("%s<%d>", likwid.getNameOfEvent(gid, e), clist[c]))

   end

end

Similarily for the metric part of course. Now you get a header like this:
GID|eventCount|cpuCount|Total Runtime|Runtime (RDTSC)<0>|Runtime (RDTSC)<1>|....

Best regards,

Thomas

P.S. If you have no control over the installation, copy the likwid-perfctr script locally and use it from there

cp $LIKWID_PREFIX/bin/likwid-perfctr .
edit likwid-perfctr
./likwid-perfctr ....

[Justin Lee]

Hello Thomas,

This is great to know! This would definitely help. Thanks.

Best,
Justin Lee

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Justin Lee

"Human potential is the greatest potential energy in the world."

https://www.linkedin.com/in/justinlee38/