Date: Fri, 25 Apr 2003 10:06:25 -0700 From: "jeev" <jeev@boldinternet.net> To: "'Petri Helenius'" <pete@he.iki.fi> Cc: freebsd-smp@freebsd.org Subject: RE: Dual 2.40ghz xeon w/hyperthreading Message-ID: <000101c30b4d$018ad950$0200a8c0@mainframe> In-Reply-To: <016601c30b48$f12ec1b0$932a40c1@PHE>
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Yea, box will have a lot of load going through it, nothing small, I found machdep.cpu_idle_hlt: 0 , im going to take people's recommendation and shut off hyperthreading. j -----Original Message----- From: Petri Helenius [mailto:pete@he.iki.fi] Sent: Friday, April 25, 2003 9:37 AM To: jeev Cc: freebsd-smp@freebsd.org Subject: Re: Dual 2.40ghz xeon w/hyperthreading >Which would give me the best performance? To disable hyperthreading or >enable machdep.cpu_idle_hlt, and if I were to enable it, it would be from >loader.conf or? If you have significant interrupt / syscall load, disable hyperthreading. If most of your work is in userland, go for idle_hlt. Someone also mentioned that current has gotten better in this regard, I havenīt tested that yet. Petehelp
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