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 > > _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
