Date: Sun, 21 Mar 2004 19:32:34 -0700 From: "Kenneth D. Merry" <ken@freebsd.org> To: "Ketrien I. Saihr-Kesenchedra" <ketrien@error404.nls.net> Cc: current@freebsd.org Subject: Re: Disable HTT on Serverworks GC-HE chipset Message-ID: <20040322023233.GA42584@panzer.kdm.org> In-Reply-To: <20040322022952.GA42512@panzer.kdm.org> References: <20040320031651.I45059@cvs.imp.ch> <405C3582.2070208@freebsd.org> <20040320142809.S45059@cvs.imp.ch> <6.0.1.1.2.20040321142158.039509c8@error404.nls.net> <20040322022952.GA42512@panzer.kdm.org>
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[ resend from my subscribed address, sorry for the duplicate... ] On Sun, Mar 21, 2004 at 14:38:04 -0500, Ketrien I. Saihr-Kesenchedra wrote: > At 09:02 AM 3/20/2004, you wrote: > >Hi Scott, > >I have tried without HTT because someone on #bsdcode told me > >to do so (ket_). Maybe you know who he is :-) Not all revisions > >of the chipset seem to be buggy so far, but rev. 0 is for sure. > > Hi everyone. Yes, I'm here. :) Been a bit busy, haven't had time to toss > in my $0.02. The issues I've seen are strictly limited to the GC-HE when > HTT is enabled, though I have had issues with other areas on some boards. > (I won't bore you with the details.) I've heard of and seen them reproduced > on Linux (2.4.x and 2.6.x) and Windows as well, so it's not just FreeBSD. > > >Serversboards with this chipset are: > >- Dell PowerEdge 2650 > >- IBM xSeries > >- Supermicro E7500 > > The E7500 is actually an Intel E7500 chipset. If there are HTT issues with > the E7500, those are more likely operating system related. As far as I can > tell, Supermicro doesn't currently offer any Serverworks boards. Tyan, on > the other hand, has the Thunder GC-HE. The four-way Xeon Dells are also > Serverworks, but I can't recall the model numbers offhand. FWIW, SuperMicro does still sell Serverworks boards, it just isn't quite as obvious after their web site redesign: http://www.supermicro.com/products/motherboard/Xeon/?typ=srvr I've got a number of X5DL8-GG (GC-LE chipset) motherboards at work, they work fine with FreeBSD and Linux. > >While using google I found the GC-LE chipsets seems to have problems > >with write-coalescing: > > As I told Martin on IRC, I'm personally not sure on this one. It wouldn't > surprise me, but I haven't had any issues with the GC-LE's personally. I > wish I could offer some suggestions, but I really don't have enough > experience with the GC-HE's to know what's going on. However, I know the > typical GC-HE + HTT symptoms on Linux are excessive context switching > (>250,000/sec) followed by semi-random panics. Windows is usually a sudden > drop in performance, which requires a reboot to correct - sometimes the > drivers can work around this apparently. Also random BSODs on occasion, but > again, usually without drivers. I haven't had any problmes with the GC-LE either, although it may be I've just never run into the problem. Ken -- Kenneth Merry ken@FreeBSD.ORG
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