Archives
Archives
| From: | Duncan <1i5t5.duncan@×××.net> | ||
|---|---|---|---|
| To: | gentoo-amd64@l.g.o | ||
| Subject: | [gentoo-amd64] Re: Upgrade from single to dual core CPU | ||
| Date: | Thu, 26 Jan 2006 13:53:23 | ||
| Message-Id: | pan.2006.01.26.13.50.11.65757@cox.net | ||
| In Reply to: | Re: [gentoo-amd64] Upgrade from single to dual core CPU by Marco Matthies |
||
| 1 | Marco Matthies posted <43D8D0ED.1010607@×××.net>, excerpted below, on |
| 2 | Thu, 26 Jan 2006 14:38:53 +0100: |
| 3 | |
| 4 | > Intel processors will indicate Hyperthreading capability in bit 28 of |
| 5 | > edx and number of logical processors in bits 16-23 of ebx after issuing |
| 6 | > the cpuid instruction. [1][2] |
| 7 | > |
| 8 | > According to [3], athlon x2 will do this as well (set edx[2]=1 and |
| 9 | > indicate two logical processors) to ensure easier software transition |
| 10 | > (maybe windows, games, etc.?). |
| 11 | > |
| 12 | > [1] |
| 13 | > http://www.intel.com/cd/ids/developer/asmo-na/eng/dc/threading/knowledgebase/43843.htm |
| 14 | > [2] |
| 15 | > http://intel.com/cd/ids/developer/asmo-na/eng/dc/threading/211924.htm?page=5 |
| 16 | > [3] http://www.x86-secret.com/?option=newsd&nid=870 |
| 17 | |
| 18 | Thanks. I hadn't realized AMD's procs set that. Useful info! |
| 19 | |
| 20 | -- |
| 21 | Duncan - List replies preferred. No HTML msgs. |
| 22 | "Every nonfree program has a lord, a master -- |
| 23 | and if you use the program, he is your master." Richard Stallman in |
| 24 | http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html |
| 25 | |
| 26 | |
| 27 | -- |
| 28 | gentoo-amd64@g.o mailing list |