The problems I've seen are normally a case of flakey memory.
Cheers,
Matt.
On Mon, 07 Mar 2005 08:14:26 -0600, Benjamin J. Weiss
<benjamin@xxxxxxxxxxx> wrote:
> Possible, though I don't think likely in my case.
>
> I'm not at home, so I can't give you the exact model, but I bought a
> pretty powerful MSI motherboard for the CPU, got the dual RAM, a serious
> aftermarket CPU fan, several case fans, etc. I don't overclock at all
> because I've always been worried about over heating or that I'd get the
> settings wrong and fry something. I've also run memtest86 for 24 hours,
> though I don't think it does the HT thing. I'm not a hardware guru, I
> just try and (barely) keep up with what's going on so that I can have
> decent performance.
>
> I know that anecdotal evidence isn't, but I've heard from at least one
> other source on the redhat list back when I was trying this that he'd
> had problems with smp kernels on HT processors as well, so I dunno.
> We're running RHEL AS 2.1 on two Xeon HT processors and they don't seem
> to have any probs. go figure.
>
> Ben
> Maciej ?enczykowski wrote:
>
> >I'll just note here, that HT really pushes the proc, it might just be
> >flaky hardware - especially if it's overclocked. I can run my computer
> >for ours on end without problems overclocked 20% and everything is fine -
> >but fire up two mersenne prime threads and it starts giving bad
> >answers (a single one is ok and two work ok when overclocked to 15%). So
> >even though for me the problem occurs at full throttle with 20%
> >overclocking, your hardware might be worse and it might occur at full
> >throttle (the kind which only the extra performance boost from HT can
> >bring out) even without it being overclocked.
> >
> >Of course this is only 1 possibility... Maybe HT support on 2.4 is just
> >plain buggy... don't know, never used HT on 2.4.
> >
> >On Thu, 3 Mar 2005, Benjamin J. Weiss wrote:
> >
> >
> >
> >>Well, when I had a process that ate a bunch of CPU on my P4 under the
> >>2.4 kernel in HT mode, sometimes I'd get a kernel panic or other crash
> >>in RHEL 3. For instance, if I was trying to run VMWare in smp mode
> >>(running a Windows guest system on the RHEL 3 host system), sometimes
> >>the vm would crash, twice the whole system died. If I ran the VMWare in
> >>uni-processor kernel, it would run fine though it would eat resources.
> >>
> >>I haven't had that happen in XP yet, when running the RHEL/CentOS guest
> >>operating systems on the XP host OS. I haven't had time to try it on
> >>CentOS 4 as the host OS yet to see how the 2.6 kernel handles the load.
> >>
> >>Ben
> >>_______________________________________________
> >>
> >>
>
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