Date: Mon, 11 Oct 2004 13:49:49 -0700 From: Nate Lawson <nate@root.org> To: Alan Cox <alc@cs.rice.edu> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/acpica acpi_cpu.c Message-ID: <416AF1ED.9060301@root.org> In-Reply-To: <20041011202237.GQ9689@cs.rice.edu> References: <200410110606.i9B66g4t036235@repoman.freebsd.org> <20041011202237.GQ9689@cs.rice.edu>
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Alan Cox wrote: > On Mon, Oct 11, 2004 at 06:06:42AM +0000, Nate Lawson wrote: > >>njl 2004-10-11 06:06:42 UTC >> >> FreeBSD src repository >> >> Modified files: >> sys/dev/acpica acpi_cpu.c >> Log: >> If bus mastering control is not available (PM2_BLK), don't just disable >> C3. Instead, flush caches before entering C3. This may be slower but >> provides good power savings. >> >> Revision Changes Path >> 1.44 +28 -17 src/sys/dev/acpica/acpi_cpu.c > > > This has pessimized the performance of my P4. For example, the "buildworld" > time has increased by 30 seconds (out of ~30 minutes). > > Is there any information about my machine that you would like to have? I would like to see acpidump -t output and sysctl hw.acpi. Please be sure you can regain performance by doing "sysctl hw.acpi.cpu.cx_lowest=C2". -Nate
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