Date: Fri, 19 Nov 2004 10:00:53 GMT From: Thomas Novin <thnov@xyz.pp.se> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/60385: vmstat/iostat/top all fail to report CPU usage (still in 5.3R) Message-ID: <200411191000.iAJA0r4E047051@freefall.freebsd.org>
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The following reply was made to PR bin/60385; it has been noted by GNATS.
From: Thomas Novin <thnov@xyz.pp.se>
To: Dima Dorfman <dd@freebsd.org>
Cc: freebsd-gnats-submit@freebsd.org
Subject: Re: bin/60385: vmstat/iostat/top all fail to report CPU usage
(still in 5.3R)
Date: Fri, 19 Nov 2004 10:56:52 +0100
At 09:41 2004-11-19, you wrote:
>Okay, so the timecounter is sane (no surprise there) but statclock
>isn't firing (no surprise there either). bde just told me about PR
>17800, which sports the same symptoms and includes a patch. Can you
>try that? It might be slightly incomplete, but it definitely sounds
/usr/src# patch -p0 < patch
Hmm... Looks like a unified diff to me...
(Patch is indented 1 space.)
The text leading up to this was:
--------------------------
| --- sys/i386/isa/clock.c.old Thu Nov 18 11:18:59 2004
| +++ sys/i386/isa/clock.c Thu Nov 18 11:12:10 2004
--------------------------
Patching file sys/i386/isa/clock.c using Plan A...
Hunk #1 failed at 946.
1 out of 1 hunks failed--saving rejects to sys/i386/isa/clock.c.rej
done
Hmm...however I manually edited the file and added 'rtcin(RTC_INTR); /*=20
clear any pending interrupt */' between 'writertc(RTC_STATUSB,=20
RTCSB_24HR);' and '/* Don't bother enabling the statistics clock. */'
Rebuilt kernel, rebooted and voila!
# sysctl kern.clockrate
kern.clockrate: { hz =3D 100, tick =3D 10000, profhz =3D 1024, stathz =3D=
128 }
# sysctl kern.timecounter
kern.timecounter.stepwarnings: 0
kern.timecounter.nbinuptime: 787111
kern.timecounter.nnanouptime: 0
kern.timecounter.nmicrouptime: 1207
kern.timecounter.nbintime: 394785
kern.timecounter.nnanotime: 85
kern.timecounter.nmicrotime: 394700
kern.timecounter.ngetbinuptime: 0
kern.timecounter.ngetnanouptime: 102
kern.timecounter.ngetmicrouptime: 160555
kern.timecounter.ngetbintime: 0
kern.timecounter.ngetnanotime: 0
kern.timecounter.ngetmicrotime: 15508
kern.timecounter.nsetclock: 4
kern.timecounter.hardware: TSC
kern.timecounter.choice: TSC(800) i8254(0) dummy(-1000000)
kern.timecounter.tick: 1
# sysctl vm.loadavg
vm.loadavg: { 4.27 2.64 1.15 }
# while [ 1 ] ; do sysctl kern.cp_time && sleep 5 ; done
kern.cp_time: 16199 206 4076 395 312
kern.cp_time: 16766 206 4147 399 312
kern.cp_time: 17364 206 4185 404 312
kern.cp_time: 17961 206 4230 404 312
kern.cp_time: 18514 206 4307 415 312
# vmstat 1
procs memory page disk faults cpu
r b w avm fre flt re pi po fr sr tw0 in sy cs us sy id
1 0 0 963436 154208 5045 1 2 1 1161 0 2613 734 6931 1447 72 19 =
9
0 0 0 963444 154284 2723 0 0 0 273 0 13 603 3355 990 20 11 69
0 0 0 963640 153924 2792 0 0 0 218 0 15 510 3259 874 22 8 71
1 0 0 963640 154228 195 0 0 17 84 0 170 759 1336 1220 2 12 87
0 0 0 964024 153776 5830 0 0 0 641 0 18 524 4363 981 39 12 49
# top
last pid: 1581; load=20
averages: 2.34, 2.74, 1.47=20
up 0+00:06:08 10:46:57
140 processes: 2 running, 138 sleeping
CPU states: 28.6% user, 0.0% nice, 11.8% system, 0.0% interrupt, 59.5%=
idle
Mem: 393M Active, 318M Inact, 141M Wired, 111M Buf, 145M Free
Swap: 1000M Total, 1000M Free
Cool... It's working again! Thanks for the help.
Thomas
--
Thomas Novin =B7 thnov@xyz.pp.se =B7 http://xyz.pp.se/~thnov/
V: +46 (0)431 445400 =B7 F: +46 (0)431 445410 =B7 GSM: +46 (0)730 667425=20
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