diff options
| author | Haavard Skinnemoen <[email protected]> | 2008-02-06 01:38:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2008-02-06 10:41:10 -0800 |
| commit | 1eed29df472a33bba013d5a2ea2f9e32f4414397 (patch) | |
| tree | 857d8c03baab8c845cd94cd601caab05e57dcb5b /tools/perf/scripts/python/bin | |
| parent | 3c72426f0539c1abce17918d1456f7a6a5a11f90 (diff) | |
atmel_spi throughput improvement
Don't insert (undesirable) delays between consecutive words (DLYBCT) or when
activating chipselects (DLYBS).
Removing the between-word delays improves the performance of bulk transfers
(such as mtd_dataflash, m25p80, mmc_spi) significantly. In one test, the
improvement was a factor of more than eight!
(The large DLYBCT value came from the legacy at91 SPI driver, and it's not
clear why it used such a huge value.)
Signed-off-by: Haavard Skinnemoen <[email protected]>
Signed-off-by: David Brownell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions