perf script python: Removing event cache as it's no longer needed
We don't need to maintain cache of 'struct event_format' objects. Currently the 'struct perf_evsel' holds this reference already. Adding events_defined bitmap to keep track of defined events, which is much cheaper than array of pointers. Signed-off-by: NJiri Olsa <jolsa@kernel.org> Acked-by: NNamhyung Kim <namhyung@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1414363445-22370-3-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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