* Felipe Balbi <balbi@xxxxxx> [150318 07:41]: > On Tue, Mar 17, 2015 at 06:18:37PM -0700, Tony Lindgren wrote: > > * Felipe Balbi <balbi@xxxxxx> [150317 17:32]: > > > Hi, > > > > > > On Tue, Mar 17, 2015 at 05:19:20PM -0700, Tony Lindgren wrote: > > > > Looks like we have cppi41 on dm816x just like on am335x. > > > > > > > > Cc: Bin Liu <binmlist@xxxxxxxxx> > > > > Cc: Brian Hutchinson <b.hutchman@xxxxxxxxx> > > > > Cc: Felipe Balbi <balbi@xxxxxx> > > > > Cc: Matthijs van Duin <matthijsvanduin@xxxxxxxxx> > > > > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> > > > > > > Any logs available ? Any throughput improvements with DMA ? > > > > So far I only logged with the debug option on. I can do some > > test runs with your for-next branch to a USB mass storage device > > if you prefer that, or got some other test in mind? > > mass storage should be fine, just wanna know if you're getting > acceptable throughput. No luck with your current merge branch with DMA right now, it's producing an error both on bbb and dm816x: "musb-hdrc musb-hdrc.0.auto: Need DT for the DMA engine." So here are some test results against -rc4. CONFIG_MUSB_PIO_ONLY Copy a 10MB file to /dev/sda right after a reboot: # time /bin/sh -c 'cp filler /mnt/ && sync' real 0m2.480s user 0m0.000s sys 0m0.320s Run hdparm a few times: # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 34 MB in 3.16 seconds = 10.75 MB/sec CONFIG_USB_TI_CPPI41_DMA Copy a 10MB file to /dev/sda right after a reboot: # time /bin/sh -c 'cp filler /mnt/ && sync' real 0m2.095s user 0m0.000s sys 0m0.310s Run hdparm a few times: # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 52 MB in 3.07 seconds = 16.94 MB/sec Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
