linux-kernel - Re: [PATCH v3] usb: musb: ux500: optimize DMA callback routine

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20110822130538.GN30398@legolas.emea.dhcp.ti.com>
Date:	Mon, 22 Aug 2011 16:05:40 +0300
From:	Felipe Balbi <balbi@...com>
To:	Per Forlin <per.forlin@...ricsson.com>
Cc:	Felipe Balbi <balbi@...com>,
	Mian Yousaf KAUKAB <mian.yousaf.kaukab@...ricsson.com>,
	Greg Kroah-Hartman <gregkh@...e.de>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	Per Forlin <per.forlin@...aro.org>
Subject: Re: [PATCH v3] usb: musb: ux500: optimize DMA callback routine

Hi,

On Wed, Aug 17, 2011 at 11:03:40AM +0200, Per Forlin wrote:
> From: Per Forlin <per.forlin@...aro.org>
> 
> Skip the use of work queue and call musb_dma_completion() directly from
> DMA callback context.
> 
> Here follows measurements on a Snowball board with ondemand governor active.
> 
> Performance using work queue:
> (105 MB) copied, 6.23758 s, 16.8 MB/s
> (105 MB) copied, 5.7151 s, 18.3 MB/s
> (105 MB) copied, 5.83583 s, 18.0 MB/s
> (105 MB) copied, 5.93611 s, 17.7 MB/s
> 
> Performance without work queue
> (105 MB) copied, 5.62173 s, 18.7 MB/s
> (105 MB) copied, 5.61811 s, 18.7 MB/s
> (105 MB) copied, 5.57817 s, 18.8 MB/s
> (105 MB) copied, 5.58549 s, 18.8 MB/s
> 
> Signed-off-by: Per Forlin <per.forlin@...aro.org>
> Acked-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@...ricsson.com>

thanks a lot :-) applied.

-- 
balbi

Download attachment "signature.asc" of type "application/pgp-signature" (491 bytes)