linux-kernel - Re: [PATCH 1/1] perf tools: perf diff for different binaries

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Message-ID: <20141031200308.GZ12538@two.firstfloor.org>
Date:	Fri, 31 Oct 2014 21:03:08 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	kan.liang@...el.com
Cc:	acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
	andi@...stfloor.org
Subject: Re: [PATCH 1/1] perf tools: perf diff for different binaries

> 
> If I run old perf diff with --sort dso,symbol, we cannot get any useful
> information for the user space binary. Furthermore, it failed to compare
> the kernel function. E.g. native_write_msr_safe.
> 
> perf diff -s dso,symbol --compute ratio v1_1_6perf.data v2_1_7perf.data

The new option needs to be documented in the manpage

(with a paragraph explaining that it allows comparison
between different versions of the binary)

-Andi
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