linux-kernel - [PATCH 0/2] perf kvm stat live: Copy events

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Date:	Thu, 18 Sep 2014 21:07:37 +0400
From:	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Yarygin <yarygin@...ux.vnet.ibm.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung.kim@....com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 0/2] perf kvm stat live: Copy events

Hello,

This is a second attempt to fix 'perf kvm stat live' crash when it tries
to parse events that have been already overwritten by the kernel.
Previous thread: https://lkml.org/lkml/2014/9/12/450

Patches
- 1/2 is patch by David Ahern (https://lkml.org/lkml/2013/9/6/388)
  rebased to the current upstream (hope I did it right). It adds an option
  to copy events when they are pushed to the samples queue.
- 2/2 enables the copying for perf kvm stat live.

Looks like we have to live with possibility to get thousands malloc()s/free()s
per second...

Alexander Yarygin (2):
  perf session: Add option to copy events when queueing
  perf kvm stat live: Enable events copying

 tools/perf/builtin-kvm.c         |  1 +
 tools/perf/util/ordered-events.c | 12 +++++++++---
 tools/perf/util/ordered-events.h |  2 +-
 tools/perf/util/session.c        | 12 +++++++++---
 tools/perf/util/session.h        |  1 +
 5 files changed, 21 insertions(+), 7 deletions(-)

-- 
1.9.1

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