Hi, On Mon, Aug 08, 2011 at 01:01:06PM +0200, Per Forlin wrote: > From: Per Forlin <per.forlin@xxxxxxxxxx> > > Skip the use of work queue and call musb_dma_completion() directly from > DMA callback context. > > Here follows measurements on a Snowball board with ondemand governor active. > > Performance using work queue: > (105 MB) copied, 6.23758 s, 16.8 MB/s > (105 MB) copied, 5.7151 s, 18.3 MB/s > (105 MB) copied, 5.83583 s, 18.0 MB/s > (105 MB) copied, 5.93611 s, 17.7 MB/s > > Performance without work queue > (105 MB) copied, 5.62173 s, 18.7 MB/s > (105 MB) copied, 5.61811 s, 18.7 MB/s > (105 MB) copied, 5.57817 s, 18.8 MB/s > (105 MB) copied, 5.58549 s, 18.8 MB/s > > Signed-off-by: Per Forlin <per.forlin@xxxxxxxxxx> > Acked-by: Mian Yousaf Kaukab<mian.yousaf.kaukab@xxxxxxxxxxxxxx> this patch doesn't apply anymore: $ patch -p1 --dry-run < ~/apply.diff patching file drivers/usb/musb/ux500_dma.c Hunk #2 FAILED at 55. Hunk #3 succeeded at 325 (offset -4 lines). Hunk #4 succeeded at 341 (offset -4 lines). Hunk #5 succeeded at 367 (offset -4 lines). 1 out of 5 hunks FAILED -- saving rejects to file drivers/usb/musb/ux500_dma.c.rej care to rebase on top of 3.1-rc1. Thanks -- balbi
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