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This restriction is not present in 'perf report' and since 'perf top' uses the same hists browser, remove it from it as well. With this we create per event buckets with callchain trees, so that # perf top --sort dso -g --no-children Bucketizes samples by DSO and below it shows the callchains leading to functions in this DSO. Try also: # perf top -e sched:*switch -g --no-children To see the callchains leading to sched switches, pressing 'E' to expand all one can quickly see the most common scheduler switches and what leads to them, for instance, calls to IO, futexes, etc. Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Link: https://lkml.kernel.org/r/20190107140854.GA28965@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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