| Date | Thu, 25 Dec 2014 23:08:50 +0100 | From | Jiri Olsa <> | Subject | Re: [PATCH 05/37] perf tools: Create separate mmap for dummy tracking event |
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On Wed, Dec 24, 2014 at 04:15:01PM +0900, Namhyung Kim wrote: > When multi file support is enabled, a dummy tracking event will be > used to track metadata (like task, comm and mmap events) for a session > and actual samples will be recorded in separate files. > > Provide separate mmap to the dummy tracking event. The size is fixed > to 128KiB (+ 1 page) as the event rate will be lower than samples. I > originally wanted to use a single mmap for this but cross-cpu sharing > is prohibited so it's per-cpu (or per-task) like normal mmaps.
maybe this needs to be applied after next patch? perf tools: Introduce perf_evlist__mmap_multi
I'm getting compile error:
[jolsa@krava perf]$ make JOBS=1 BUILD: Doing 'make -j1' parallel build CC util/evlist.o util/evlist.c: In function ‘perf_evlist__mmap_per_evsel’: util/evlist.c:937:9: error: ‘struct mmap_params’ has no member named ‘track’ if (mp->track && perf_evsel__is_dummy_tracking(evsel)) { ^ util/evlist.c: In function ‘perf_evlist__mmap’: util/evlist.c:1092:62: error: ‘use_track_mmap’ undeclared (first use in this function) if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist, use_track_mmap) < 0) ^ util/evlist.c:1092:62: note: each undeclared identifier is reported only once for each function it appears in make[1]: *** [util/evlist.o] Error 1 make: *** [all] Error 2
jirka
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