perf session: Cache sample objects

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When the sample queue is flushed we free the sample reference objects. Though
we need to malloc new objects when we process further. Stop the malloc/free
orgy and cache the already allocated object for resuage. Only allocate when
the cache is empty.

Performance gain: ~ 10%

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20101130163820.338488630@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

...

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Thomas Gleixner 2010-11-30 17:49:53 +00:00 • committed by Arnaldo Carvalho de Melo

parent fe17420784

commit 020bb75a6d

2 changed files with 27 additions and 4 deletions

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tools/perf/util/session.c

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tools/perf/util/session.h

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