On Wed, 18 Sep 2013, Freehill Christopher-RAT063 wrote:
> > Have you tried grouping with {}? It should force a subset to run
> > together.
> >
> > For example:
> > perf stat -e \{instructions,cycles\} /bin/ls
> >
> > will always run instructions and cycles at the same time. You need the \
> > so the shell won't escape the {
> >
> > as an aside, there are ARM chips that support offcore SOC events?
>
> Vince,
> Thanks for the suggestion. I hadn't tried that, and was not knowledgeable
> about grouping. Unfortunately, I still see the same behavior using grouping.
>
> That is, if I had the following:
>
> Perf stat -e \{a,b,c\} /bin/ls
>
> (assume a, b and c are legit events)
>
> the event a is added, configured for and then deleted. Then, then a and b are
> added, configured for, then deleted. Finally, a, b and c are added,
> configured for and deleted. This pattern would continue for however many
> events I specify.
>
> This is probably just broken in my own environment. I'll investigate more. Of
> course, any suggestions are welcome.
Support for { } grouping wasn't introduced until the version of perf
that came with Linux 3.7 so that might affect the results you see.
Vince
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