Date: Fri, 28 Feb 2003 12:11:57 -0700 (US Mountain Standard Time) From: Steve Grandi <grandi@noao.edu> To: freebsd-stable@freebsd.org Subject: hyperthreading in STABLE: should machdep.cpu_idle_hlt be on? Message-ID: <Pine.WNT.4.53.0302281209460.296@rigel>
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I've brought up STABLE on a Supermicro X5DPR-8G2+ motherboard which has two 2.4GHz Xeons. In the BIOS setup, I disabled hyperthreading. The BIOS even prints out a nice message during the POST that hyperthreading is disabled. The BIOS setting notwithstanding, STABLE fires up hyperthreading and presents me with 4 cpus! OK, I will go with the flow: but what is the current wisdom about machdep.cpu_idle_hlt? Should I set it to 1 to avoid a loss of performance and to avoid frying the box? -- Steve Grandi National Optical Astronomy Observatory/AURA Inc., Tucson AZ USA Internet: grandi@noao.edu Voice: +1 520 318-8228 FAX: +1 520 318-8360 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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