Date: Sun, 22 Nov 1998 14:44:15 -0500 (EST) From: Snob Art Genre <benedict@echonyc.com> To: questions@FreeBSD.ORG Subject: X and my WM using 40% CPU on an idle system Message-ID: <Pine.GSO.4.02.9811221430490.19477-100000@echonyc.com>
next in thread | raw e-mail | index | archive | help
Hello hackers,
I noticed today that wmaker and XF86_S3V were stealing precious cycles
from my rc5 client! As in:
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
1224 ben 105 19 744K 456K RUN 295:40 60.23% 60.23% rc5des
1102 ben 2 0 2848K 2296K select 53:34 18.58% 18.58% wmaker
1099 ben 2 0 11208K 10292K select 52:21 17.93% 17.93% XF86_S3V
This seems more than a little weird on an idle system. Furthermore,
quite a bit of this excessive CPU usage is in the kernel.
CPU states: 16.3% user, 54.5% nice, 28.8% system, 0.4% interrupt, 0.0%
idle
I'm running 3.0-current, and XFree86 version 3.3.2.3.
I don't know how long this has been going on, I just noticed it today.
The X server seems to be looping on read, writev, gettimeofday, select,
like so:
1099 XF86_S3V RET writev 32/0x20
1099 XF86_S3V CALL gettimeofday(0xefbfd8c4,0)
1099 XF86_S3V RET gettimeofday 0
1099 XF86_S3V CALL select(0x80,0x1ed930,0,0,0)
1099 XF86_S3V RET select 1
1099 XF86_S3V CALL read(0x7,0x3ec008,0x1000)
1099 XF86_S3V GIO fd 7 read 4 bytes
"+\0\^A\0"
Wmaker seems to be doing something similar. I'm not sure where either
of these loops begins or ends, but here's what seems to be a complete
cycle from wmaker:
1102 wmaker CALL read(0x3,0xefbfda10,0x20)
1102 wmaker GIO fd 3 read 32 bytes
"\^A\^B\M^D\M-x\0\0\0\0\^Q\0\0\^A\0\0\0\0\0\0\0\0\^A\0\0\0\0\0\0\0\^T\
\M-C\^_\0"
1102 wmaker RET read 32/0x20
1102 wmaker CALL ioctl(0x3,FIONREAD,0xefbfd21c)
1102 wmaker RET ioctl 0
1102 wmaker CALL
select(0x4,0xefbfdbb8,0xefbfdb38,0xefbfdab8,0xefbfdab0)
1102 wmaker RET select -1 errno 22 Invalid argument
1102 wmaker CALL gettimeofday(0xefbfdc38,0)
1102 wmaker RET gettimeofday 0
1102 wmaker CALL ioctl(0x3,FIONREAD,0xefbfd424)
1102 wmaker RET ioctl 0
1102 wmaker CALL ioctl(0x3,FIONREAD,0xefbfd424)
1102 wmaker RET ioctl 0
1102 wmaker CALL gettimeofday(0xefbfda2c,0)
1102 wmaker RET gettimeofday 0
1102 wmaker CALL write(0x3,0x63800,0x4)
1102 wmaker GIO fd 3 wrote 4 bytes
"+\0\^A\0"
1102 wmaker RET write 4
I have a weird feeling they're talking to each other. If I suspend
wmaker, XF86's CPU usage drops to zero.
Does anyone out there have any clues for me?
Ben
"You have your mind on computers, it seems."
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.GSO.4.02.9811221430490.19477-100000>