Date: Tue, 29 Nov 2005 13:51:34 +0100 From: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> To: Kris Kennaway <kris@obsecurity.org> Cc: stable@freebsd.org, Scot Hetzel <swhetzel@gmail.com>, Joseph Koshy <joseph.koshy@gmail.com> Subject: Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ? Message-ID: <460BE48B-594F-4450-AFA7-1652B7C6800A@anduin.net> In-Reply-To: <20051129103719.GB43032@xor.obsecurity.org> References: <84dead720511280545v2bc0bc35jd107da06b9a788cb@mail.gmail.com> <20187843-76FC-4EAB-AFF8-7493FB0C0077@anduin.net> <84dead720511280654j138635abgcb9cc0978e6c26b7@mail.gmail.com> <02757598-222D-408E-8B33-C2EE1E6E426E@anduin.net> <20051128211440.GB28963@xor.obsecurity.org> <3A601A32-94D1-49F6-AB06-ED54D50D4B6A@anduin.net> <20051128235911.GA31669@xor.obsecurity.org> <20051129094531.Y23958@anduin.net> <20051129091533.GA41885@xor.obsecurity.org> <C8244498-F58F-4CCD-9BA5-7B9E19EAD517@anduin.net> <20051129103719.GB43032@xor.obsecurity.org>
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On Nov 29, 2005, at 11:37 , Kris Kennaway wrote: > On Tue, Nov 29, 2005 at 10:25:07AM +0100, Eirik ?verby wrote: >> >> On Nov 29, 2005, at 10:15 , Kris Kennaway wrote: >> >>> On Tue, Nov 29, 2005 at 09:46:09AM +0100, Eirik Oeverby wrote: >>>> >>>> >>>> On Mon, 28 Nov 2005, Kris Kennaway wrote: >>>> >>>>> On Mon, Nov 28, 2005 at 10:53:00PM +0100, Eirik ?verby wrote: >>>>>> Firmware versions are equal. BIOS settings are equal. >>>>>> However, a diff of the dmesgs show (apart from MAC address >>>>>> differences): >>>>>> >>>>>> 30c30 >>>>>> < Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000 >>>>>> --- >>>>>>> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 >>>>>> >>>>>> What on earth is that all about? The "slow" box has the ACPI-fast >>>>>> timecounter... >>>>> >>>>> Could be ACPI bugs on your system: >>>> >>>> Yes, but the other system is 100% equal - hardware, bios config, >>>> bios and >>>> bootblock revision, controller bioses, etc. etc. >>>> It all matches. >>> >>> Clearly they're not 100% equal, but (100-epsilon)%. Your job is to >>> identify the origin of the epsilon :-) >> >> Yea yea ;) Working on it.. >> Is there a way to force ACPI-safe on the slower system? > > I think someone already mentioned this..see the > kern.timecounter.hardware and other kern.timecounter sysctls. I have now forced ACPI-safe on the slow system, to match the fast one. Too bad though, it made absolutely zero difference. I'm upgrading BIOSes on both boxes now, even though they seem equal. Then I'll see what ACPI debug output shows me. If you have any other hints or ideas, please let me know... thanks so far. /Eirik > > Kris
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