Here are the results (let the script run for a few secs):
CPU ID FUNCTION:NAME
1 2 :END DEVICE TIME (ns)
i9151 22111
heci0 23119
pci-ide0 38700
uhci1 47277
hci13940 50554
uhci3 63145
uhci0 64232
uhci4 103429
ehci1 107272
ehci0 108445
uhci2 112589
e1000g0 160024
Regards,
Gernot Wolf
Am 20.10.11 20:22, schrieb Rennie Allen:
Try the following script, which will identify any drivers with high
interrupt load
---------------------
#!/usr/sbin/dtrace -s
sdt:::interrupt-start { self->ts = vtimestamp; }
sdt:::interrupt-complete
/self->ts&& arg0 != 0/
{
this->devi = (struct dev_info *)arg0;
self->name = this->devi != 0 ?
stringof(`devnamesp[this->devi->devi_major].dn_name) : "?";
this->inst = this->devi != 0 ? this->devi->devi_instance : 0;
@num[self->name, this->inst] = sum(vtimestamp - self->ts);
self->name = 0;
}
sdt:::interrupt-complete { self->ts = 0; }
dtrace:::END
{
printf("%11s %16s\n", "DEVICE", "TIME (ns)");
printa("%10s%-3d %@16d\n", @num);
}
---------------------
On 10/20/11 11:07 AM, "Michael Stapleton"
<michael.staple...@techsologic.com> wrote:
That rules out userland.
Sched tells me that it is not a user process. If kernel code is
executing on a cpu, tools will report the sched process. The count was
how many times the process was taken off the CPU while dtrace was
running.
Lets see what kernel code is running the most:
#dtrace -n 'sched:::off-cpu { @[stack()]=count()}'
#dtrace -n 'profile-1001 { @[stack()] = count() }'
On Thu, 2011-10-20 at 19:52 +0200, Gernot Wolf wrote:
Yeah, I've been able to run this diagnostics on another OI box (at my
office, so much for OI not being used in production ;)), and noticed
that there were several values that were quite different. I just don't
have any idea on the meaning of this figures...
Anyway, here are the results of the dtrace command (I executed the
command twice, hence two result sets):
gernot@tintenfass:~# dtrace -n 'sched:::off-cpu { @[execname]=count()}'
dtrace: description 'sched:::off-cpu ' matched 3 probes
^C
ipmgmtd 1
gconfd-2 2
gnome-settings-d 2
idmapd 2
inetd 2
miniserv.pl 2
netcfgd 2
nscd 2
ospm-applet 2
ssh-agent 2
sshd 2
svc.startd 2
intrd 3
afpd 4
mdnsd 4
gnome-power-mana 5
clock-applet 7
sendmail 7
xscreensaver 7
fmd 9
fsflush 11
ntpd 11
updatemanagernot 13
isapython2.6 14
devfsadm 20
gnome-terminal 20
dtrace 23
mixer_applet2 25
smbd 39
nwam-manager 60
svc.configd 79
Xorg 100
sched 394078
gernot@tintenfass:~# dtrace -n 'sched:::off-cpu { @[execname]=count()}'
dtrace: description 'sched:::off-cpu ' matched 3 probes
^C
automountd 1
ipmgmtd 1
idmapd 2
in.routed 2
init 2
miniserv.pl 2
netcfgd 2
ssh-agent 2
sshd 2
svc.startd 2
fmd 3
hald 3
inetd 3
intrd 3
hald-addon-acpi 4
nscd 4
gnome-power-mana 5
sendmail 5
mdnsd 6
devfsadm 8
xscreensaver 9
fsflush 10
ntpd 14
updatemanagernot 16
mixer_applet2 21
isapython2.6 22
dtrace 24
gnome-terminal 24
smbd 39
nwam-manager 58
zpool-rpool 65
svc.configd 79
Xorg 82
sched 369939
So, quite obviously there is one executable standing out here, "sched",
now what's the meaning of this figures?
Regards,
Gernot Wolf
Am 20.10.11 19:22, schrieb Michael Stapleton:
Hi Gernot,
You have a high context switch rate.
try
#dtrace -n 'sched:::off-cpu { @[execname]=count()}'
For a few seconds to see if you can get the name of and executable.
Mike
On Thu, 2011-10-20 at 18:44 +0200, Gernot Wolf wrote:
Hello all,
I have a machine here at my home running OpenIndiana oi_151a, which
serves as a NAS on my home network. The original install was
OpenSolaris
2009.6 which was later upgraded to snv_134b, and recently to oi_151a.
So far this OSOL (now OI) box has performed excellently, with one
major
exception: Sometimes, after a reboot, the cpu load was about 50-60%,
although the system was doing nothing. Until recently, another reboot
solved the issue.
This does not work any longer. The system has always a cpu load of
50-60% when idle (and higher of course when there is actually some
work
to do).
I've already googled the symptoms. This didn't turn up very much
useful
info, and the few things I found didn't apply to my problem. Most
noticably was this problem which could be solved by disabling cpupm
in
/etc/power.conf, but trying that didn't show any effect on my system.
So I'm finally out of my depth. I have to admit that my knowledge of
Unix is superficial at best, so I decided to try looking for help
here.
I've run several diagnostic commands like top, powertop, lockstat
etc.
and attached the results to this email (I've zipped the results of
kstat
because they were>1MB).
One important thing is that when I boot into the oi_151a live dvd
instead of booting into the installed system, I also get the high cpu
load. I mention this because I have installed several things on my OI
box like vsftpd, svn, netstat etc. I first thought that this problem
might be caused by some of this extra stuff, but getting the same
system
when booting the live dvd ruled that out (I think).
The machine is a custom build medium tower:
S-775 Intel DG965WHMKR ATX mainbord
Intel Core 2 Duo E4300 CPU 1.8GHz
1x IDE DVD recorder
1x IDE HD 200GB (serves as system drive)
6x SATA II 1.5TB HD (configured as zfs raidz2 array)
I have to solve this problem. Although the system runs fine and
absolutely serves it's purpose, having the cpu at 50-60% load
constantly
is a waste of energy and surely a rather unhealthy stress on the
hardware.
Anyone any ideas...?
Regards,
Gernot Wolf
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