Date: Mon, 28 Nov 2005 22:53:00 +0100 From: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> To: Kris Kennaway <kris@obsecurity.org> Cc: stable@freebsd.org, Joseph Koshy <joseph.koshy@gmail.com> Subject: Re: Reduced java/tomcat performance 6-beta3 -> 6-stable ? Message-ID: <3A601A32-94D1-49F6-AB06-ED54D50D4B6A@anduin.net> In-Reply-To: <20051128211440.GB28963@xor.obsecurity.org> 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>
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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... /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 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
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