Date: Wed, 17 Sep 2008 21:46:25 GMT From: Miks <miks@skynet.lv> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/127451: incorrect load on quad core Message-ID: <200809172146.m8HLkPmJ049541@www.freebsd.org> Resent-Message-ID: <200809172150.m8HLo1de020657@freefall.freebsd.org>
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>Number: 127451 >Category: amd64 >Synopsis: incorrect load on quad core >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Sep 17 21:50:01 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Miks >Release: 7.0 release amd64 >Organization: skynet >Environment: FreeBSD sun 7.0-RELEASE-p4 FreeBSD 7.0-RELEASE-p4 #4: Thu Sep 11 22:08:16 EEST 2008 miks@sun:/usr/obj/usr/src/sys/SUN amd64 >Description: I got load average around 0.5, and top show something like this "1021 processes: 1 running, 1020 sleeping CPU states: 4.9% user, 0.0% nice, 3.6% system, 0.9% interrupt, 90.6% idle" - this all is ok. then once in 2-5 minutes, there for 2-3 seconds are: "1020 processes:67 running, 912 sleeping, 1 zombie, 40 lock CPU states: 3.0% user, 0.0% nice, 96.7% system, 0.3% interrupt, 0.0% idle" - this is the problem. after this load average is 20-30 and dropping in 2-3min to 0.5. during this time system is very slow. even ssh session is freezing. most of processes are fastcgi/php, so there is not one big resource hungry process. found similar problem here: http://unix.derkeiler.com/Mailing-Lists/FreeBSD/stable/2007-11/msg00551.html >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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