Thanks, Jason. I'm learning and I appreciate the help! Bob Jason wrote: >My apologies for my cut off email. As I was saying... there is an article >at Tom's Hardware here: >http://www.tomshardware.com/cpu/02q1/0203131/dual-02.html which details a >bit about Hyperthreading, along with what it does and does not get you... > >'cpu cache bound' (correct me if I'm wrong) is refering to applications that >cause information to be stored in the L2 cache. >http://www.webopedia.com/TERM/L/L2_cache.html >http://www.cnet.com/Resources/Info/Glossary/Terms/l2cache.html > >I'm not sure what types of processes make heavy use of this cache but there >performance is degraded by HyperThreading from what I understand. Basically >if it ain't written for it, it will probably run worse rather than better. >I have heard Hyperthreading referred to as a good idea, and as a hack. I >tend to agree with 'hack' though I'm not an engineer and I can't really tell >you with any degree of non-troll like intelligence. > >Jason > > > > >----- Original Message ----- >From: "Robert L. Cochran" <cochranb@speakeasy.net> >To: <psyche-list@redhat.com> >Sent: Monday, October 14, 2002 8:35 PM >Subject: Re: Hyper Threaded Pentium 4 > > > > >>I'm new to the CPU-level stuff and don't have much background in them. >>So some of the terms are new for me. Let me get really basic: why would >>you want multiple processors on a motherboard as opposed to a single >>fast processor? I take it that the Xeon line is for multiple CPU >>motherboards -- you don't just run one Xeon, am I right? What does it >>mean, to be 'cpu cache bound'? >> >>Do your comments also mean the Red Hat kernel won't need testing on the >>new Hyper Threaded P4s? >> >>Thanks >> >>Bob Cochran >> >>Samuel Flory wrote: >> >> >> >>>Red Hat has support this since one of the 7.2 kernel updates. This is >>>old hat on the current crop of Xeon (aka P4 Xeon). Linux treats them >>>as multiple cpus. Don't assume that this will make your system faster. >>>If you tend to only one process active at a time then it will slow >>>things down. It's also really bad if you are cpu cache bound. >>> >>> >>> >>> >>> >>> >> >>-- >>Psyche-list mailing list >>Psyche-list@redhat.com >>https://listman.redhat.com/mailman/listinfo/psyche-list >> >> >> > > > > > -- Psyche-list mailing list Psyche-list@redhat.com https://listman.redhat.com/mailman/listinfo/psyche-list
