Re: [PATCH] Add munmap events to perf

From: Peter Zijlstra
Date: Tue Jun 29 2010 - 07:28:09 EST

On Tue, 2010-06-29 at 09:33 +0100, Eric B Munson wrote:
> On Mon, 28 Jun 2010, Peter Zijlstra wrote:
> > On Mon, 2010-06-28 at 19:08 +0100, Eric B Munson wrote:
> > > This patch adds a new software event for munmaps. It will allows
> > > users to profile changes to address space. munmaps will be tracked
> > > with mmaps.
> >
> > Why?
> >
> It is going to be used by a tool that will model memory usage over the
> lifetime of a process.

Wouldn't it be better to use some tracepoints for that instead? I want
to keep the sideband data to a minimum required to interpret the sample
data, and you don't need unmap events for that.

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