From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Subject: Re: need help in DMA performance Date: Thu, 18 Jan 2007 21:47:27 -0600 Message-ID: <45B03F4F.1080701@gmail.com> References: <1c5b04b60701181235m16695fc0r7a25136d75f15afc@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1c5b04b60701181235m16695fc0r7a25136d75f15afc@mail.gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-omap-open-source-bounces+gplao-linux-omap-open-source=gmane.org@linux.omap.com Errors-To: linux-omap-open-source-bounces+gplao-linux-omap-open-source=gmane.org@linux.omap.com To: Bhaskara Rao Kotla Cc: linux-omap-open-source@linux.omap.com List-Id: linux-omap@vger.kernel.org Bhaskara Rao Kotla stated on 1/18/2007 2:35 PM: > Hi, > I am working on OMAPSDP 2430 platform. Can someone suggest, which > is the > best way to measure the real-time accurate performance of DMA > transfer(DDR > location A to DDR location B (or) DDR location A to SRAM location B). Is > there any timer code APIs available to measure? http://kerneltrap.org/node/7345 a simple ctrl+f in the include/linux gave: http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=blob;h=fca93025ab5191db9a1d4aeb9734dbfa2f574a20;hb=c5783642bf20735e33f12dbe3ea1235c53cbc846;f=include/linux/hrtimer.h http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=blob;h=611f17f79eefe32f78605589f175db8a77616474;hb=c5783642bf20735e33f12dbe3ea1235c53cbc846;f=include/linux/ktime.h http://source.mvista.com/git/gitweb.cgi?p=linux-omap-2.6.git;a=blob;h=a5b739967b74f46f745526952b1c947c236cf75a;hb=c5783642bf20735e33f12dbe3ea1235c53cbc846;f=include/linux/time.h Also i suggest a bit of google arnd.. and u;d see test code from tony himself here: http://muru.com/linux/omap/patches/old/patch-2.6.1-omap-dma-test.bz2 and other patches.. Regards, NM