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| author | Nicolas Pitre <nico@cam.org> | 2006-12-04 20:29:21 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-12-07 17:06:53 +0100 |
| commit | 752bee178ee107aa3dd87a9aeba970444034c6fb (patch) | |
| tree | 7bc5f554781182c88602c2dd43ddd664a32aac24 /Documentation/arm | |
| parent | [ARM] 3979/1: extend the SA11x0 sched_clock implementation from 32 to 63 bit ... (diff) | |
| download | linux-752bee178ee107aa3dd87a9aeba970444034c6fb.tar.xz linux-752bee178ee107aa3dd87a9aeba970444034c6fb.zip | |
[ARM] 3980/1: extend the ARM Versatile sched_clock implementation from 32 to 63 bit
period
This provides a 63 bit clock counter guaranteed to be monotonic over a
period of 35583 days instead of a clock wrap every 179 seconds, as long
as sched_clock() is called at least once every 89 seconds. This should
not be a problem in practice, although a kernel timer could be scheduled
every 80 seconds for example simply to call sched_clock() making sure
top bits are always synchronized if need be.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'Documentation/arm')
0 files changed, 0 insertions, 0 deletions