From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ayman El-Khashab <ayman@elkhashab.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: ppc44x - how do i optimize driver for tlb hits
Date: Sat, 25 Sep 2010 08:11:04 +1000 [thread overview]
Message-ID: <1285366264.14081.33.camel@pasglop> (raw)
In-Reply-To: <20100924130851.GA14016@crust.elkhashab.com>
On Fri, 2010-09-24 at 08:08 -0500, Ayman El-Khashab wrote:
>
> I suppose another option is to to use the kernel profiling option I
> always see but have never used. Is that a viable option to figure out
> what is happening here?
With perf and stochastic sampling ? If you sample fast enough... but
you'll mostly point to your routine I suppose... though it might tell
you statistically where in your code, which -might- help.
Cheers,
Ben.
next prev parent reply other threads:[~2010-09-24 22:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 15:12 ppc44x - how do i optimize driver for tlb hits Ayman El-Khashab
2010-09-23 22:01 ` Benjamin Herrenschmidt
2010-09-23 22:35 ` Ayman El-Khashab
2010-09-24 1:07 ` Benjamin Herrenschmidt
2010-09-24 2:58 ` Ayman El-Khashab
2010-09-24 4:43 ` Benjamin Herrenschmidt
2010-09-24 10:30 ` Josh Boyer
2010-09-24 13:08 ` Ayman El-Khashab
2010-09-24 22:11 ` Benjamin Herrenschmidt [this message]
2010-10-03 19:13 ` Ayman El-Khashab
2010-10-03 22:38 ` Benjamin Herrenschmidt
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