Date: Mon, 02 Feb 2004 00:51:34 +0100 From: Andreas Braukmann <braukmann@tse-online.de> To: "Haapanen, Tom" <tomh@waterloo.equitrac.com> Cc: amd64@freebsd.org Subject: RE: Dual processor, AMD 64 machine freezing. Message-ID: <1071900000.1075679494@cage.int.unixxinu.de> In-Reply-To: <B1D77424948FD611A3B80000C0109EEF023B4D3D@SYNCRO> References: <B1D77424948FD611A3B80000C0109EEF023B4D3D@SYNCRO>
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On 02/01/04 18:34:10 -0500 Haapanen, Tom wrote: > I run a K8S Pro with dual 244s (couldn't find any 246s and the 248s were > just too dear for me) and 2 GB ... and I started off with an Adaptec 2100S > RAID, but had consistent panics when booting. Apparently the aac driver > isn't exactly 64-bit clean. The 2100S isn't driven by aac(4) but by asr(4). The asr-driver is in fact not 64-bit clean (as Scott Long stated multiple times :-/). The aac-driver is perfectly fine with the 64 bits (for me). It survives heavy i/o load without a hitch. I ran quite a bunch of tests (parallel bonnie++ spreaded over multiple raid volumes and multiple file systems, postmark, etc.) with my 2200S, 2120S and 5400S. > P.S. For best performance, I think you really want to run 4x 512 MB. > Running with two DIMMs means either you only get 64-bit memory access (not > 128-bit) or else you need to put both DIMMs into the CPU1 memory slots > (which means CPU2 will have to access those through hypertransport). Thats theory. ;-) Since the allocators don't know about the numa-like architecture memory would be accessed through hyptertransport (statistically) more or less "half of the time". (CPU0 ---> HT ---> MEM1 ; CPU1 ---> HT ---> MEM0) -Andreas
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