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| author | Per Forlin <per.forlin@linaro.org> | 2011-08-17 11:03:40 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-12-12 11:51:39 +0200 |
| commit | be18a251892ab85d1bc10d87d336ee25f8dba615 (patch) | |
| tree | f49d961002ab75e4f3af1833aa1470b85337485d /drivers/usb/musb/cppi_dma.c | |
| parent | dc47ce90c3a822cd7c9e9339fe4d5f61dcb26b50 (diff) | |
| download | blackbird-op-linux-be18a251892ab85d1bc10d87d336ee25f8dba615.tar.gz blackbird-op-linux-be18a251892ab85d1bc10d87d336ee25f8dba615.zip | |
usb: musb: ux500: optimize DMA callback routine
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@linaro.org>
Acked-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/cppi_dma.c')
0 files changed, 0 insertions, 0 deletions
