| commit | 911afb96071041a61df2e12cdaa8916dbde80c96 | |
| author | Hasso Tepper <hasso@estpak.ee> | |
| Mon, 4 May 2009 08:45:16 +0000 (4 11:45 +0300) | ||
| committer | Hasso Tepper <hasso@estpak.ee> | |
| Mon, 4 May 2009 08:50:57 +0000 (4 11:50 +0300) | ||
| tree | 38763ed1b46a971a8c4c86a1d187ffc17dbac3bc | treesnapshot (tar.gz zip) |
| parent | 9a9b8f25f3d9cba03eef5fb64a0df336a796167e | commitdiff |
Rework a CPU C-state selection logic a bit.
Avoid comparing negative signed to positive unsignad values. It was
leading to a bug, when C-state does not decrease on sleep shorter then
declared transition latency. Fixing this deprecates workaround for broken
C-states on some hardware.
By the way, change state selecting logic a bit. Instead of last sleep
time use short-time average of it. Global interrupts rate in system is a
quite random value, to corellate subsequent sleeps so directly.
Obtained-from: FreeBSD
Avoid comparing negative signed to positive unsignad values. It was
leading to a bug, when C-state does not decrease on sleep shorter then
declared transition latency. Fixing this deprecates workaround for broken
C-states on some hardware.
By the way, change state selecting logic a bit. Instead of last sleep
time use short-time average of it. Global interrupts rate in system is a
quite random value, to corellate subsequent sleeps so directly.
Obtained-from: FreeBSD
| sys/dev/acpica5/acpi_cpu.c | diffblobblamehistory |