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| author |   Dimitri Sivanich <sivanich@sgi.com> | 2011-05-06 10:33:44 -0500 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2011-05-26 17:11:24 -0700 |
| commit | 19d78a61be6dd707dcec298c486303d4ba2c840a (patch) | |
| tree | 57c0bc50540ec0f49b7b972f14cee51bc4f22e60 /tools/perf/scripts/python/syscall-counts.py | |
| parent | maintainers: add dma engine tree details (diff) | |
| download | linux-dev-19d78a61be6dd707dcec298c486303d4ba2c840a.tar.xz linux-dev-19d78a61be6dd707dcec298c486303d4ba2c840a.zip | |
x86: poll waiting for I/OAT DMA channel status
For certain system configurations a 5 usec udelay before checking I/OAT DMA
channel status is sometimes not sufficient, resulting in a false failure
status and unnecessary freeing of channel resources. Conversely, for many
configurations 5 usec is longer than necessary.
Loop for up to 20 usec waiting for successful status before failing.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions