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

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Message-ID: <20160530160402.GI22049@tassilo.jf.intel.com>
Date:	Mon, 30 May 2016 09:04:02 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
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

> 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

-Andi