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Date: Tue, 05 Feb 2013 09:15:20 -0700
From: David Ahern <dsahern@gmail.com>
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To: Jiri Olsa <jolsa@redhat.com>
CC: linux-kernel@vger.kernel.org,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>, Ingo Molnar <mingo@elte.hu>,
        Paul Mackerras <paulus@samba.org>,
        Corey Ashford <cjashfor@linux.vnet.ibm.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Namhyung Kim <namhyung@kernel.org>, Andrew Jones <drjones@redhat.com>
Subject: Re: [PATCH 2/2] perf scripts: Fix rwtop record script
References: <1360080351-3246-1-git-send-email-jolsa@redhat.com> <1360080351-3246-3-git-send-email-jolsa@redhat.com>
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On 2/5/13 9:05 AM, Jiri Olsa wrote:
> Adding -D option into the rwtop record command line, to get
> immediate response when there's event in the buffer.

Seems like this will dramatically increase CPU usage of perf-record as 
well as increase the overhead of each event with a process wakeup. How 
about a poll option on perf-record to have it wake up at a given rate 
instead?

David