Date: Tue, 07 Feb 2006 15:39:09 +0300 From: astatech@mail.ru To: freebsd-smp@freebsd.org Subject: 6.0 Stable on 8 Core AMD Opteron scalability. Message-ID: <E1F6S7h-000HkR-00.astatech-mail-ru@f36.mail.ru>
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Hi all! Please help solve problem. I have following server: - 8 cores at 2.2GHz/16GB RAM - FreeBSD 6.0 kernel compiled with SMP support for amd64 (4BSD scheduler, maxusers=2048, disabled unused hardware) - Apache, PHP, Mysql - 1GBit NIC (bge) I perform some benchmark and have very strange results with scalability. I start getting timeouts on client side after at 256 client threads, but CPU idle on server 30-40%. The top utility display that almost all httpd processes running on 7s core, and other 3-4 cores are idle. I am sure that bottleneck not on client side or server physical IO/memory. With 256 threads I get 30 Requests\sec on FreeBSD and 280 Requests\sec on Solaris (100% load). What can I do to utilize all CPU power on FreeBSD? WBR, Alex.
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