linux-kernel - Re: [PATCH v2] perf tools: fix endian conversion reading event attr from file header

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Date:	Sun, 17 Jul 2011 20:12:04 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	David Ahern <dsahern@...il.com>, peterz@...radead.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...e.hu>
Cc:	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	paulus@...ba.org
Subject: Re: [PATCH v2] perf tools: fix endian conversion reading event attr
 from file header

On Fri, Jul 15, 2011 at 12:34:09PM -0600, David Ahern wrote:
> The perf_event_attr struct has 2 __u32's at the top and need to
> be swapped individually. With this change I was able to analyze
> a perf.data collected in a 32-bit PPC VM on an x86 system. I
> tested both 32-bit and 64-bit binaries for the Intel analysis
> side; both read the PPC perf.data file correctly.
> 
> v1 -> v2:
> - changed the existing perf_event__attr_swap to swap only elements
>   of perf_event_attr and exported it for use in swapping the
>   attributes in the file header
> - updated swap_ops used for processing events
> 
> Signed-off-by: David Ahern <dsahern@...il.com>

Thanks!

Acked-by: Frederic Weisbecker <fweisbec@...il.com>
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