Date: Mon, 28 Nov 2005 23:44:18 +0100 From: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> To: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> Cc: stable@freebsd.org, Joseph Koshy <joseph.koshy@gmail.com>, Kris Kennaway <kris@obsecurity.org> Subject: Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ? Message-ID: <9720F96D-A0F7-4639-8852-63A0F2C1FCDE@anduin.net> In-Reply-To: <3A601A32-94D1-49F6-AB06-ED54D50D4B6A@anduin.net> References: <93F6B911-8C64-4F5C-81F9-80EC271ED298@anduin.net> <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>
next in thread | previous in thread | raw e-mail | index | archive | help
Update: The diff below was made after making sure both systems are =20 running the exact same kernel. Behavior is the same. Building new =20 kernels (6-STABLE) now to get out of the BETA stage. /Eirik On Nov 28, 2005, at 22:53 , Eirik =D8verby wrote: > Firmware versions are equal. BIOS settings are equal. > However, a diff of the dmesgs show (apart from MAC address =20 > 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 =20 > timecounter... > > /Eirik > > On Nov 28, 2005, at 22:14 , Kris Kennaway wrote: > >> On Mon, Nov 28, 2005 at 09:54:30PM +0100, Eirik ?verby wrote: >>> Hi, >>> >>> I think I have found the culprit. There must be some sort of >>> difference between the machines after all (BIOS revision?), because >>> while on one machine the interrupt rate for the bge card stays very >>> low (2 to be exact) during maximum load, the other machine goes >>> beyond 1000 and keeps rising constantly. This might also explain why >>> performance slowly degrades over time on that machine, and response >>> times vary wildly, while the "fast" machine responds nicely within >>> 1-2 seconds no matter the load and testing time. >>> >>> I will have to investigate this more closely. Is there a way to =20 >>> force >>> the NIC to polling mode (I'm assuming that is the difference, an IRQ >>> rate of 2 is too low for a heavily loaded server if the NIC is >>> interrupt-driven)? >>> >>> Anything else I could look at? >> >> BIOS update. >> >> Kris > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-=20 > unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?9720F96D-A0F7-4639-8852-63A0F2C1FCDE>