Date: Thu, 17 Oct 2002 14:44:07 -0500 (CDT) From: James Schmidt <james@JamesSchmidt.Com> To: Dan Nelson <dnelson@allantgroup.com> Cc: questions@FreeBSD.ORG Subject: Re: 'screen' causing 100% cpu utilization on 4.6.2-Release-p2 Message-ID: <20021017143206.X54604-100000@speedy.insekure.com> In-Reply-To: <20021017193114.GC71982@dan.emsphone.com>
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Screen version 3.09.11 (FAU) 14-Feb-02
From the Truss output, this looks suspicious:
seteuid(0x3e8) = 0 (0x0)
setegid(0x0) = 0 (0x0)
open("/tmp/uscreens/S-james/54657.ttyp2.speedy",0x4,00) = 4 (0x4)
seteuid(0x3e8) = 0 (0x0)
setegid(0x0) = 0 (0x0)
select(0x400,0xbfbff428,0xbfbff3a8,0x0,0x0) = 1 (0x1)
fcntl(0x4,0x4,0x0) = 0 (0x0)
read(0x4,0x8088480,0xc30) = 0 (0x0)
close(4) = 0 (0x0)
seteuid(0x3e8) = 0 (0x0)
setegid(0x0) = 0 (0x0)
open("/tmp/uscreens/S-james/54657.ttyp2.speedy",0x4,00) = 4 (0x4)
seteuid(0x3e8) = 0 (0x0)
setegid(0x0) = 0 (0x0)
select(0x400,0xbfbff428,0xbfbff3a8,0x0,0x0) = 1 (0x1)
fcntl(0x4,0x4,0x0) = 0 (0x0)
read(0x4,0x8088480,0xc30) = 0 (0x0)
close(4) = 0 (0x0)
.
.
.
ad infinitum...
That help ? I'm not a coder or developer by any means, so I am not sure
what this could indicate. Thanks for the help-
James
On Thu, 17 Oct 2002, Dan Nelson wrote:
> In the last episode (Oct 17), James Schmidt said:
> > I recently cvsup'd to 4.6.2-Release-p2, and I noticed that the 'screen'
> > virtual screen utility is now causing 100% cpu utilization.
> >
> > FreeBSD speedy 4.6.2-RELEASE-p2 FreeBSD 4.6.2-RELEASE-p2 #7: Tue Oct 8
> > 14:31:06 CDT 2002 root@speedy:/usr/src/sys/compile/UNIPROC i386
> >
> > last pid: 427; load averages: 0.96, 0.51, 0.23
> > up 0+00:21:25 11:45:17 41 processes: 2 running, 39 sleeping
> > CPU states: 19.4% user, 0.0% nice, 79.8% system, 0.6% interrupt, 0.2% idle
> > Mem: 22M Active, 130M Inact, 87M Wired, 36K Cache, 112M Buf, 764M Free Swap: 2048M Total, 2048M Free
> >
> > PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
> > 416 root 52 0 1648K 1356K RUN 2:03 96.60% 96.44% screen
>
> What version of screen?
>
> Try truss'ing the process and see if it's doing any syscalls. Another
> option is to gdb the live process and get a stack trace.
>
> --
> Dan Nelson
> dnelson@allantgroup.com
>
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