Date: Sun, 21 May 2006 16:56:02 -0400 From: "Tamouh H." <hakmi@rogers.com> To: <freebsd-performance@freebsd.org> Subject: FBSD 5.x CPU performance on MSVS 2005 Message-ID: <20060521205542.BD2C343D67@mx1.FreeBSD.org>
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Hi, I've been doing some testing with Microsoft Virtual Server 2005 R2 and FreeBSD, so far compatibility has been great across the board with all versions of FreeBSD from 4.x - 7.x on IDE based virtual drives (no compatibility with SCSI driver). However, on FreeBSD 5.x I noticed the CPU detected by FreeBSD is half of the actual CPU available (e.g. the machine has 6 x 900MHz CPUs and each VM is assigned a 900MHz CPU), yes FreeBSD 5.x detects the CPU frequency at 400-498MHz no matter what settings I try to change and what options I've added to the kernel. This usually resulted in "time went backward" errors and significant performance impact. I tried FBSD 7.x-CURRENT and the CPU was detected perfectly fine as P-III 900MHz and performance was much better improved. Results were obtained through: > sysctl hw.clockrate I've left notes on this matter at freebsd-questions: http://lists.freebsd.org/pipermail/freebsd-questions/2006-January/111628.html Any advise or check on this is appreciated, I can provide access to the VM machines if wanted. Thx, Tamouh Hakmihelp
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