Messages in this thread | | | Subject | Re: [PATCH 00/11] perf tool: Add PERF_SAMPLE_READ sample read support | From | Peter Zijlstra <> | Date | Fri, 26 Oct 2012 11:14:45 +0200 |
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On Fri, 2012-10-26 at 10:29 +0900, Namhyung Kim wrote: > Hi Jiri, > > On Sat, 20 Oct 2012 16:33:08 +0200, Jiri Olsa wrote: > > hi, > > adding support to read sample values through the PERF_SAMPLE_READ > > sample type. It's now possible to specify 'S' modifier for an event > > and get its sample value by PERF_SAMPLE_READ. > > I have a question. What's an actual impact of specifying 'S' modifiere > to a non-group event or even only a (non-leader) member of a group? For > instance, 'cycles:S' or '{branches,branch-misses:S}'.
I would hope a syntax error from the parser ;-)
I haven't actually looked at the implementation, but I understood it to be a group modifier, not an event modifier.
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