Date: Thu, 28 Feb 2013 11:27:02 +0000 (UTC) From: Davide Italiano <davide@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r247460 - head/sys/dev/acpica Message-ID: <201302281127.r1SBR2VE068276@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: davide Date: Thu Feb 28 11:27:01 2013 New Revision: 247460 URL: http://svnweb.freebsd.org/changeset/base/247460 Log: MFcalloutng (r247427 by mav): We don't need any precision here. Let it be fast and dirty shift then slow and excessively precise 64-bit division. Modified: head/sys/dev/acpica/acpi_cpu.c Modified: head/sys/dev/acpica/acpi_cpu.c ============================================================================== --- head/sys/dev/acpica/acpi_cpu.c Thu Feb 28 10:59:40 2013 (r247459) +++ head/sys/dev/acpica/acpi_cpu.c Thu Feb 28 11:27:01 2013 (r247460) @@ -981,8 +981,8 @@ acpi_cpu_idle(sbintime_t sbt) /* Find the lowest state that has small enough latency. */ us = sc->cpu_prev_sleep; - if (sbt >= 0 && us > sbt / SBT_1US) - us = sbt / SBT_1US; + if (sbt >= 0 && us > (sbt >> 12)) + us = (sbt >> 12); cx_next_idx = 0; if (cpu_disable_deep_sleep) i = min(sc->cpu_cx_lowest, sc->cpu_non_c3);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201302281127.r1SBR2VE068276>