| commit | 752bee178ee107aa3dd87a9aeba970444034c6fb | |
| author | Nicolas Pitre <nico@cam.org> | |
| Mon, 4 Dec 2006 19:29:21 +0000 (4 20:29 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Thu, 7 Dec 2006 16:06:53 +0000 (7 16:06 +0000) | ||
| tree | 7bc5f554781182c88602c2dd43ddd664a32aac24 | treesnapshot (tar.gz zip) |
| parent | 2f1675c11a0a214855ff6cba23aca239eef7a5fb | commitdiff |
[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>
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>
| arch/arm/mach-versatile/core.c | diffblobblamehistory |