Date: Thu, 16 Jul 2009 08:27:12 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/acpica acpi_cpu.c Message-ID: <200907160827.n6G8RRvr030822@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
mav 2009-07-16 08:27:12 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/dev/acpica acpi_cpu.c
Log:
SVN rev 195714 on 2009-07-16 08:27:12Z by mav
MFC rev. 191760, 191763, 191764.
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.
Make dev.cpu.X.cx_usage sysctl also report current average of sleep time.
Revision Changes Path
1.67.2.6 +13 -43 src/sys/dev/acpica/acpi_cpu.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200907160827.n6G8RRvr030822>