Date: Fri, 07 Nov 2008 15:50:54 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: php-cgi frozen with sbwait when SMP enable Message-ID: <gf1kka$oj6$1@ger.gmane.org> In-Reply-To: <d018a9bd0811070610t6eaa5b08l4b59cc1857e2fbd1@mail.gmail.com> References: <d018a9bd0811070329s30b463b0m6885e1f568217b89@mail.gmail.com> <gf1bc5$lbu$1@ger.gmane.org> <d018a9bd0811070610t6eaa5b08l4b59cc1857e2fbd1@mail.gmail.com>
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[-- Attachment #1 --]
Ken Chen wrote:
> Oh.. sorry, I forgot to provide the information of my environment.
>
> web4# php-cgi -v
> PHP 5.2.6 (cgi-fcgi) (built: Nov 2 2008 11:16:30)
> Copyright (c) 1997-2008 The PHP Group
> Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
> with XCache v1.2.2, Copyright (c) 2005-2007, by mOo
> web4# /usr/local/lighttpd/sbin/lighttpd -v
> lighttpd-1.4.19 - a light and fast webserver
> Build-Date: Sep 1 2008 16:58:51
> web4# uname -a
> FreeBSD web4.xxxx.com 7.0-RELEASE-p5 FreeBSD 7.0-RELEASE-p5 #11: Mon Nov 3
> 01:10:36 CST 2008 root@web4.xxxx.com:/usr/obj/usr/src/sys/WEB4 i386
> web4# ps alx | grep php-cgi | grep -v grep | grep sbwait
> 65534 57776 47240 0 4 0 182328 84984 sbwait I ?? 2:02.12
> /usr/local/bin/php-cgi
> 65534 57801 47240 0 4 0 182328 82408 sbwait I ?? 0:19.97
> /usr/local/bin/php-cgi
> 65534 57809 47240 0 4 0 182328 84096 sbwait I ?? 1:12.03
> /usr/local/bin/php-cgi
> 65534 57823 47240 0 4 0 182328 84492 sbwait I ?? 2:04.21
> /usr/local/bin/php-cgi
> 65534 57833 47240 0 4 0 183352 83316 sbwait I ?? 0:28.62
> /usr/local/bin/php-cgi
> 65534 57866 47240 0 4 0 182328 79952 sbwait I ?? 0:05.92
> /usr/local/bin/php-cgi
> 65534 57870 47240 0 4 0 182328 83184 sbwait I ?? 0:56.83
> /usr/local/bin/php-cgi
> 65534 57871 47240 0 4 0 182328 83388 sbwait I ?? 0:54.96
> /usr/local/bin/php-cgi
> 65534 57891 47240 0 4 0 182328 84436 sbwait I ?? 1:58.32
> /usr/local/bin/php-cgi
> 65534 57925 47240 0 4 0 182328 84380 sbwait I ?? 2:03.53
> /usr/local/bin/php-cgi
> 65534 65944 47240 0 4 0 182328 84184 sbwait I ?? 0:39.97
> /usr/local/bin/php-cgi
> 65534 65952 47240 0 4 0 182328 84408 sbwait I ?? 0:21.37
> /usr/local/bin/php-cgi
This does seem a bit unusual, but seeing that your execution times are
not null it might that the PHP servers are actually doing some useful
work. You should have a mixture of various states in PHP - do they show
up in top?
My own example is:
last pid: 77421; load averages: 2.82, 2.59, 2.13
up
55+16:58:49 15:48:16
209 processes: 2 running, 206 sleeping, 1 zombie
CPU: 49.8% user, 0.0% nice, 2.8% system, 0.0% interrupt, 47.4% idle
Mem: 1493M Active, 1583M Inact, 278M Wired, 139M Cache, 112M Buf, 505M Free
Swap: 4500M Total, 416M Used, 4084M Free, 9% Inuse
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
75863 www 1 4 0 162M 50020K sbwait 3 2:54 36.77% php-cgi
76830 www 1 103 0 156M 41556K CPU2 3 1:28 36.77% php-cgi
76834 www 1 4 0 163M 56628K sbwait 0 2:23 33.59% php-cgi
76019 www 1 4 0 150M 38948K accept 3 3:12 20.56% php-cgi
76825 www 1 4 0 158M 42912K accept 2 1:21 18.16% php-cgi
76846 www 1 4 0 162M 42600K sbwait 1 1:07 14.36% php-cgi
76835 www 1 4 0 151M 39948K accept 2 1:28 12.60% php-cgi
76829 www 1 4 0 150M 36564K sbwait 2 1:46 2.98% php-cgi
This is unusually high load, a spike, for this server but it has many
cores and it's stable. It's also running 7.1-PRERELEASE.
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