On Tue, 2010-05-11 at 12:00 -0300, Arnaldo Carvalho de Melo wrote: > > Humm, since for -C and -a using -i doesn't make sense, I guess it should > be off by default and only be auto-activated if we don't specify any > option, i.e. when using it like: > > perf record ./hackbench > > What do you think?
-ENOPARSE -a/-C usage creates per-cpu counters and will thus ignore any and all perf_event_attr::inherit state. Your above suggestion would still have inherit enabled by default, and would thus not change anything. The thing is that perf-record defaults to inherited per-task-per-cpu counters, which, I think, is a reasonable default, just sub-optimal for single threaded/!forking subjects. So what would make sense is for -i to mean --no-inherit, and for ! inherit create a per-task counter instead of a per-task-per-cpu counter. ------------------------------------------------------------------------------ _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
