From: Scott Wood <scottwood@freescale.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Michael Neuling <mikey@neuling.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
<linuxppc-dev@ozlabs.org>
Subject: Re: question on FSL_EMB perf
Date: Wed, 10 Jun 2015 14:17:10 -0500 [thread overview]
Message-ID: <1433963830.2477.136.camel@freescale.com> (raw)
In-Reply-To: <20150610114126.GN19282@twins.programming.kicks-ass.net>
On Wed, 2015-06-10 at 13:41 +0200, Peter Zijlstra wrote:
> Hi Mike, Ben,
>
> I just noticed:
>
> arch/powerpc/Kconfig: select HAVE_PERF_EVENTS_NMI if PPC64
>
> But can't ppc32 have FSL_EMB perf?
Yes, but it doesn't use NMIs. ppc64 has lazy interrupt disabling
which functions as a pseudo-NMI.
-Scott
next prev parent reply other threads:[~2015-06-10 19:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-10 11:41 question on FSL_EMB perf Peter Zijlstra
2015-06-10 19:17 ` Scott Wood [this message]
2015-06-10 19:27 ` Peter Zijlstra
2015-06-10 20:13 ` Scott Wood
2015-06-10 21:14 ` Peter Zijlstra
2015-06-10 21:28 ` Scott Wood
2015-06-11 6:00 ` Michael Ellerman
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