linux-kernel - Re: [PATCH] perf tools: Fix ordering with unstable tsc

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Message-ID: <4F60FA76.2070204@gmail.com>
Date:	Wed, 14 Mar 2012 14:07:18 -0600
From:	David Ahern <dsahern@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Frederic Weisbecker <fweisbec@...il.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] perf tools: Fix ordering with unstable tsc

On 3/14/12 1:55 PM, Arnaldo Carvalho de Melo wrote:
> Shouldn't we try to robustify this checking against HEADER_NRCPUS (if
> present)?
>
> I just tried to see how to find that info, but unfortunately it just
> prints it when calling perf_header__fprintf_info, it can be made to
> work.
>
> I need to work on storing those values in a struct accessible thru
> perf_session or perf_evlist, so that I can show that info on the TUI,
> perhaps at that time I can robustify this way.

Xiao added a design for retrieving data for the features in the proposed 
kvm-events tool. See the header.c changes in 
http://thread.gmane.org/gmane.linux.kernel/1262482

David
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