http://www.tomshardware.com/cpu/20021202/hyperthreading-01.html http://www.tomshardware.com/cpu/20021227/index.html I've come to understand that better HT support hinges at least in part on the compiler. Also, while Linux may support HT "out of the box", I believe the real performance gains come when kernels are specifically written to take advantage of HT. A single 3.06 MHz HT processor isn't the same as two separate non-HT 3.06 MHz processors, so specific kernel optimizations may also be necessary to realize the true benefit of HT. Those more familiar with HT, especially as it relates to Linux, are encouraged to correct whatever I may have just pulled out of my a55. :) Mike ----- Original Message ----- From: "Peter Larsen" <plarsen@xxxxxxxxxxxxxxxxxxxxxxx> To: <psyche-list@xxxxxxxxxx> Sent: Monday, March 10, 2003 10:25 PM Subject: Re: support for hyperthreading? On Monday, March 10, 2003 22:09 PM, Michael Wardle <michael.wardle@xxxxxxxxxx> wrote: > On Tuesday, March 11, 2003 14:00, Saqib Ali wrote: >> Does the latest Linux Kernel support Intel's new HyperThreading >> processors? > > No, if I remember correctly, HT support is just going into the latest > development kernel (2.5.x), which means that the current stable kernel > (2.4.x) probably doesn't support it yet. What do you define as support? I'm running Linux tintin 2.4.18-24.8.0smp #1 SMP Fri Jan 31 06:03:47 EST 2003 i686 i686 i386 GNU/Linux on a dual XEON with HT, and I do see 4 processors that all get scheduled with processes. What am I missing? Regards Peter Larsen -- Psyche-list mailing list Psyche-list@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/psyche-list -- Psyche-list mailing list Psyche-list@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/psyche-list
