Hi Subbrathnam, The only difference I feel is that I used a thumb USB Memory, which is SanDisk cruzer micro 1.0GB, and you used USB HDD.
I can't understand Why? my read speed is so high, and why the write speed so low. I'll try the USB hdd when I get one. Good Luck. 2008/5/31, Subbrathnam, Swaminathan <[EMAIL PROTECTED]>: > Lee, > > On the TI DaVinci EVM I am consistently getting around 4-6MBps throughput > writing to the USB HDD's under DMA mode. > > Many more MUSB fixes need to be done still compared to the 2.6.10 kernel > MUSB driver. I am planning to do the same gradually as seperate patches. > > Any way I can reproduce your test setup ? > > swami > > ________________________________________ > From: Frank Xue [EMAIL PROTECTED] > Sent: Wednesday, May 28, 2008 8:24 AM > To: Ashuaria Lee > Cc: Subbrathnam, Swaminathan; davinci-linux-open-source > Subject: Re: USB CPPI DMA patch for DaVinci > > > Lee, Swami, > > I did a simple and quick test. The kernel was also configured with > default setting. > It seems this patch fixed USB stability issue. > > test case: > ~ 20 files, about 100MBytes every file. > > Speed benchmark result on git 2.6.25 > --------------------------------------------- > Read: 3.6M Bytes/sec > Write: 2.8M Bytes/sec > > Lee, I almost could not believe the writing performance is so poor ( > 0.38MB/sec) on your board. > :( > > Regards > > Frank > > Ashuaria Lee wrote: > > Hi, > > > > You patch DID work with the stability, and didn't crash using DMA mode. > > And Also I got more speed on reading data from USB-storage. > > The reading performance has increased significantly. > > But, the write speed has decreased. > > > > Let me add the screenshot of each results. > > > > The short summary is > > ============================================ > > MVL 2.6.10 with patch 45 | GIT 2.6.25 with your DMA patch > > Read: 8.78MB/sec | 12MB/sec > > Write: 3.7MB/sec | 0.38MB/sec > > ============================================ > > > > The GIT was configured with default setting and only changed to use DMA > for USB. > > did I do something wrong? > > > > Any opinions? > > > > Best Regards, > > Ashuaria Lee > > > > > -- Regards, Ashuaria Lee _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
