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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mugunthan V N <mugunthanvnm@ti.com>,
	Richard Cochran <richardcochran@gmail.com>,
	netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] net/cpsw: don't disable_irqs() after an interrupt has been received.
Date: Wed, 17 Apr 2013 11:19:18 +0200	[thread overview]
Message-ID: <516E6916.3000804@linutronix.de> (raw)
In-Reply-To: <1366136460-30732-1-git-send-email-bigeasy@linutronix.de>

On 04/16/2013 08:21 PM, Sebastian Andrzej Siewior wrote:
> In my testing I didn't notice anything unusual except one thing: I start
> a wget of a 126MiB file (which is sttored on MMC) from the beagle bone.
> On the first invocation I receive almost steady 5MiB/sec. In the
> following invocations of wget I see the performance floating between
> 1MiB/sec and 4MiB/sec. It usually ends with overall around 2MiB/sec.
> I couldn't notice nothing wrong. The only difference compared to the
> first invocation is (most likely) that the file is now served from
> memory and not read from MMC which should perform better but not worse.
> After executing "while ((1)); do /bin/true; done" on the beagle bone
> while the file was downloaded, I noticed that the speed rose to 9MiB/sec
> - 10/MiB/sec. Now this looks like power/idle optimization on the beagle
> bone side.

Yeah, disabling NO_HZ gives 11.2 MiB/s.

Sebastian

      parent reply	other threads:[~2013-04-17  9:19 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-16 18:21 [PATCH] net/cpsw: don't disable_irqs() after an interrupt has been received Sebastian Andrzej Siewior
2013-04-17  6:19 ` Mugunthan V N
2013-04-17  7:44   ` Sebastian Andrzej Siewior
2013-04-17  8:46     ` Mugunthan V N
2013-04-17  9:02       ` Sebastian Andrzej Siewior
2013-04-17 10:08         ` Mugunthan V N
2013-04-17 10:49           ` Sebastian Andrzej Siewior
2013-04-17 11:44             ` Mugunthan V N
2013-04-17 11:55             ` D-Link DUB E100 C1 not working when pinged by "ping 172.17.0.1 -c 1 -s 1965" Dean Jenkins
2013-04-17 21:12           ` [PATCH] net/cpsw: don't disable_irqs() after an interrupt has been received Sebastian Andrzej Siewior
2013-04-17  9:19 ` Sebastian Andrzej Siewior [this message]

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