Hi Felipe, On Monday 15 March 2010 09:41:40 Felipe Balbi wrote: > Hi, > > On Mon, Feb 15, 2010 at 12:28:09AM +0100, ext Laurent Pinchart wrote: > >Is there any known reliability issue with MUSB double buffered endpoints ? > > I've been testing it with my mode1 dma patches and musb rtl1.8 with > omap3630 and it seems to be working quite well. Here are some throught > measurement with mass storage mode: Thanks. Mass storage doesn't use isochronous mode though. I'll retest isochronous transfers on an OMAP3630. > a) eMMC > > $ ./msc -t 0 -o /dev/sdc -s 65536 -c 1024 > test 0: sent 64.0000 MBytes read 21.56 MB/s write 17.77 MB/s ... success > > $ sudo hdparm -tT /dev/sdc > > /dev/sdc: > Timing cached reads: 11480 MB in 2.00 seconds = 5745.01 MB/sec > Timing buffered disk reads: 46 MB in 3.17 seconds = 14.49 MB/sec > > > > b) TMPFS > > $ ./msc -t 0 -o /dev/sdc -s 65536 -c 1024 > test 0: sent 64.0000 MBytes read 20.67 MB/s write 17.75 MB/s ... success > > $ sudo hdparm -tT /dev/sdc > > /dev/sdc: > Timing cached reads: 11804 MB in 2.00 seconds = 5908.09 MB/sec > Timing buffered disk reads: 32 MB in 1.60 seconds = 19.98 MB/sec > > > I'll try to re-apply the dma mode1 patches on top of current mainline > during next week so you will be able to test them as well. Thanks. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
