linux-kernel - Re: [PATCH 1/4] perf stat: Basic support for TopDown in perf stat

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Date:	Mon, 30 May 2016 13:19:42 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>, jolsa@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] perf stat: Basic support for TopDown in perf stat

Em Mon, May 30, 2016 at 09:04:02AM -0700, Andi Kleen escreveu:
> > Which is a Broadwell-U, dual-core, 14 nm.
> > 
> > [root@...et linux]# echo 0 > /proc/sys/kernel/nmi_watchdog
> > [root@...et linux]# perf stat --topdown -a usleep 1
> > System does not support topdown
> > [root@...et linux]# cat /proc/sys/kernel/nmi_watchdog
> > 0
> > [root@...et linux]#
> > 
> > Please advise.
> 
> You don't have the kernel patches?
> 
> They're in PeterZ's tree, but not yet in tip
> https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git/log/?h=perf/core

oops, will try applying those patches, thanks for claryfing.

- Arnaldo