Please confirm: top(1) cpu time broken on FreeBSD 6.1 (RELEASE/STABLE) SMP ?

[Vinny Abello]

Disable hyperthreading in your BIOS.

At 10:20 AM 7/18/2006, Martin Blapp wrote:

>Hi,
>
>Ok, seems to be a HTT issue on a untuned system.
>
>On two boxes I get with 'sysctl -a | grep smp | grep kern.smp.cpus'
>kern.smp.cpus: 4
>
>Here I see CPU-IDs 0 and 2 in top. No other CPUs seem to be
>used. Here I get the broken CPU usage.
>
>And yes, seeting hyperthreading_allowed=1 corrects the top usage.
>
>On two other boxes where it works I get 'sysctl -a | grep smp | grep 
>kern.smp.cpus' kern.smp.cpus: 2
>
>Here I see CPU-ID's 0 and 1 in top. Here everything works as it should.
>
>Martin
>
>Martin Blapp, <mb at imp.ch> <mbr at FreeBSD.org>
>------------------------------------------------------------------
>ImproWare AG, UNIXSP & ISP, Zurlindenstrasse 29, 4133 Pratteln, CH
>Phone: +41 61 826 93 00 Fax: +41 61 826 93 01
>PGP: <finger -l mbr at freebsd.org>
>PGP Fingerprint: B434 53FC C87C FE7B 0A18 B84C 8686 EF22 D300 551E
>------------------------------------------------------------------
>
>_______________________________________________
>freebsd-stable at freebsd.org mailing list
>http://lists.freebsd.org/mailman/listinfo/freebsd-stable
>To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"


Vinny Abello
Network Engineer
Server Management
vinny at tellurian.com
(973)300-9211 x 125
(973)940-6125 (Direct)
PGP Key Fingerprint: 3BC5 9A48 FC78 03D3 82E0  E935 5325 FBCB 0100 977A

Tellurian Networks - The Ultimate Internet Connection
http://www.tellurian.com (888)TELLURIAN

"Courage is resistance to fear, mastery of fear - not absence of 
fear" -- Mark Twain