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From: Anton Blanchard <anton@samba.org>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, paulus@samba.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH] powerpc/mm: Add trace point for tracking hash pte fault
Date: Mon, 2 Feb 2015 21:26:07 +1100	[thread overview]
Message-ID: <20150202212607.7585dedb@kryten> (raw)
In-Reply-To: <1422425467.11009.2.camel@ellerman.id.au>

Hi,

> > ebizzy with -S 30 -t 1 -P gave
> > 13627 records/s -> Without patch
> > 13546 records/s -> With patch with tracepoint disabled
> 
> OK. So that's about -0.6%. Are we happy with that? I'm not sure.
> 
> Can you do a few more runs and see if that's a stable result.

Surprisingly large. Is CONFIG_JUMP_LABEL enabled? That should reduce the
tracepoint to just a nop.

Anton

  reply	other threads:[~2015-02-02 10:26 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-20 11:35 [PATCH] powerpc/mm: Add trace point for tracking hash pte fault Aneesh Kumar K.V
2015-01-21  3:07 ` Michael Ellerman
2015-01-21  8:45   ` Aneesh Kumar K.V
2015-01-28  6:11     ` Michael Ellerman
2015-02-02 10:26       ` Anton Blanchard [this message]
2015-02-02 16:21         ` Aneesh Kumar K.V
2015-02-02 22:01           ` Anton Blanchard
2015-02-03  3:07             ` Aneesh Kumar K.V
2015-02-02 16:12       ` Aneesh Kumar K.V
2015-04-02  8:44         ` Aneesh Kumar K.V

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