From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: Stop irqsoff trace on return to user
Date: Wed, 22 Dec 2010 23:37:32 +0000 [thread overview]
Message-ID: <20101222233732.GC29368@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1291434107-17713-1-git-send-email-toddpoynor@google.com>
On Fri, Dec 03, 2010 at 07:41:47PM -0800, Todd Poynor wrote:
> If the irqsoff tracer is in use, stop tracing the interrupt disable
> interval when returning to userspace. Tracing userspace execution
> time as interrupts disabled time is not useful for kernel
> performance analysis purposes, and crowds out more helpful results
> with long userspace execution times. Some other architectures do
> something similar.
>
> Only do so if the irqsoff tracer is enabled, to avoid overhead for
> lockdep, which doesn't care about userspace execution time with
> interrupts disabled.
Ok, can you send this to the patch system please?
next prev parent reply other threads:[~2010-12-22 23:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-04 3:41 [PATCH] ARM: Stop irqsoff trace on return to user Todd Poynor
2010-12-22 23:37 ` Russell King - ARM Linux [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-11-15 22:53 Todd Poynor
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