bin/60385: vmstat/iostat/top all fail to report CPU usage(still in 5.3R)

[Jeff Behl]

The following reply was made to PR bin/60385; it has been noted by GNATS.

From: Jeff Behl <jbehl at fastclick.com>
To: Dima Dorfman <dd at freebsd.org>
Cc: freebsd-gnats-submit at freebsd.org, Thomas Novin <thnov at xyz.pp.se>
Subject: Re: bin/60385: vmstat/iostat/top all fail to report CPU usage (still
 in 5.3R)
Date: Mon, 22 Nov 2004 17:56:38 -0800

 Sorry for the delay.  My output is below.  It may be a while before I 
 can try out a patch as were in a little bit of a bind and need the 
 systems to be up and stable for a while.  That, and I only see the 
 problem pop up sporatically.  After a reboot, things seem to work fine 
 for a seemingly random amount of time.  Having said that, not being able 
 to see my CPU utilization is pretty scary as these machines are under a 
 decent amount of load.  If it's going to help a lot, I may be able to 
 prioritize and add the patch.  Please let me know.
 
 
 www6# top
 last pid: 29362;  load averages:  0.07,  0.12,  0.16    up 4+08:04:51  
 17:45:51
 30 processes:  1 running, 29 sleeping
 CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  0.0% 
 idle
 Mem: 714M Active, 503M Inact, 150M Wired, 32K Cache, 214M Buf, 483M Free
 Swap: 4069M Total, 4069M Free
 
 FreeBSD www6.cdn.sjc 5.3-RELEASE FreeBSD 5.3-RELEASE #0: Tue Nov 16 
 15:41:52 PST 2004     root at www6.cdn.sjc:/usr/obj/usr/src/sys/SMP  amd64
 
 www6# sysctl kern.clockrate
 kern.clockrate: { hz = 1024, tick = 976, profhz = 1024, stathz = 128 }
 
 www6# sysctl kern.timecounter
 kern.timecounter.tick: 1
 kern.timecounter.choice: TSC(-100) ACPI-fast(1000) i8254(0) dummy(-1000000)
 kern.timecounter.hardware: ACPI-fast
 kern.timecounter.nsetclock: 6
 kern.timecounter.ngetmicrotime: 38349140
 kern.timecounter.ngetnanotime: 0
 kern.timecounter.ngetbintime: 0
 kern.timecounter.ngetmicrouptime: 209761019
 kern.timecounter.ngetnanouptime: 16567
 kern.timecounter.ngetbinuptime: 0
 kern.timecounter.nmicrotime: 249915960
 kern.timecounter.nnanotime: 20037
 kern.timecounter.nbintime: 249935822
 kern.timecounter.nmicrouptime: 29418
 kern.timecounter.nnanouptime: 0
 kern.timecounter.nbinuptime: 1939815878
 kern.timecounter.stepwarnings: 0
 kern.timecounter.smp_tsc: 0
 
 www6#
 www6# sysctl vm.loadavg
 vm.loadavg: { 0.09 0.12 0.17 }
 
 www6# fgrep Timecounter /var/run/dmesg.boot
 Timecounter "i8254" frequency 1193182 Hz quality 0
 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
 Timecounters tick every 0.976 msec
 
 www6# sysctl kern.cp_time && sleep 5 && sysctl kern.cp_time && sleep 5 && !!
 sysctl kern.cp_time && sleep 5 && sysctl kern.cp_time && sleep 5 && 
 sysctl kern.cp_time && sleep 5 && sysctl kern.cp_time && sleep 5
 kern.cp_time: 732270 104 925106 790100 90108268
 kern.cp_time: 732270 104 925106 790100 90108268
 kern.cp_time: 732270 104 925106 790100 90108268
 kern.cp_time: 732270 104 925106 790100 90108268
 
 
 
 www6# /usr/bin/time ls -R > /dev/null
         0.00 real         0.00 user         0.00 sys