Re: [PATCH V3 00/22] perf tools: Introduce an abstraction for Instruction Tracing

From: David Ahern
Date: Mon Dec 15 2014 - 10:10:14 EST

On 12/15/14 2:08 AM, Adrian Hunter wrote:
On 12/12/14 20:53, Arnaldo Carvalho de Melo wrote:
Em Fri, Dec 12, 2014 at 09:13:25AM -0700, David Ahern escreveu:
On 12/12/14 6:47 AM, Adrian Hunter wrote:
Here is V3 of some more preparatory patches for Intel PT
that introduce an abstraction for Instruction tracing.

This is an x86-Intel only feature correct? If that is the case then the code
should be not compiled for other architectures.

It is not that simple. In the case of recording, it is not needed for
architectures that don't support it, but in the case of session processing
any architecture can (or should be able to) process the file of
any other architecture.

Understood. perf is a kitchen sink tool and the size of binaries for embedded deployments is getting out of hand. e.g., for our PPC based systems the entire root filesystem is 46M with perf taking up almost 3M of that (stripped size too). New features need config options so user's can decide the feature scope of what they are building. And we need to get the kconfig style builds committed as well.

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