Date: Thu, 14 Dec 2006 14:37:28 -0600 From: "M. L. Dodson" <mldodson@houston.rr.com> To: freebsd-hackers@freebsd.org Subject: "Syncing cpus" on a multi-cpu, dual core system Message-ID: <200612141437.28724.mldodson@houston.rr.com>
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On a computational chemistry list I subscribe to there is a current thread about multi-cpu systems needing to have the cpu frequencies synced (this is in a Linux context). This is evidently not just having the cpus running at nominally the same frequency but something else in addition. A posting in the thread said variations less than 0.1% were not problematic. However, the poster said it was an issue in a dual cpu, dual core system he had set up. My questions are: 1. Is this real or an urban legend? 2. If real, is this a Linuxism or is FreeBSD affected as well? 3. How do you "sync" the cpus, if it is needed? 4. anything else some one wants to expound on along this line. Bud Dodson -- M. L. Dodson Email: mldodson-at-houston-dot-rr-dot-com Phone: eight_three_two-56_three-386_one
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