linux-kernel - Re: [PATCH 00/19 V2] perf, c2c: Add new tool to analyze cacheline contention on NUMA systems

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Message-ID: <20140228194233.GK25953@redhat.com>
Date:	Fri, 28 Feb 2014 14:42:33 -0500
From:	Don Zickus <dzickus@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jolsa@...hat.com, jmario@...hat.com, fowles@...each.com,
	eranian@...gle.com
Subject: Re: [PATCH 00/19 V2] perf, c2c: Add new tool to analyze cacheline
 contention on NUMA systems

On Fri, Feb 28, 2014 at 10:57:48AM -0800, Andi Kleen wrote:
> Don Zickus <dzickus@...hat.com> writes:
> >
> > A handful of patches include re-enabling MMAP2 support and some fixes
> > to perf itself.
> 
> I would suggest to pursue the lone kernel patch separately. Hopefully
> that can be merged soon, once the remainin problems with that are 
> addressed.

Good point.

> 
> >
> > Comemnts, feedback, anything else welcomed.
> 
> As a high level comment, can you add support for CSV mode? 
> (-x, in other tools)

It's there. :-)

perf c2c -r -x, report

will spit out raw records in CSV format.

> 
> I assume most people would data mine the output in some form,
> and that's much easier with a more machine oriented format.
> 
> Also you should probably have the standard perf conventions
> for output fds (--log-fd, --output, default to stderr). otherwise
> the output may often be lost.

Ok,  I'll look into what that entails.

Thanks!

Cheers,
Don
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