Date: Thu, 05 Feb 2015 11:45:27 -0600 From: Matthew Grooms <mgrooms@shrew.net> To: freebsd-stable@freebsd.org Subject: High load w/ almost no CPU usage Message-ID: <54D3AC37.8030107@shrew.net>
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Hello all,
I've been writing some software to replace some off the shelf call
center software. It is designed to interface with freeswitch as the
underlying telephony platform. The 10.1-RELEASE-p4 host that runs
freeswitch consumes 0% to < 10% CPU and has a load that for the most
part fluctuates between 0 and 2. But at seemingly random intervals, the
load average jumps to a very high value, and then eventually drops back
down to < 2. I should add that it doesn't matter how many calls are
going through the system, as this issue occurs after hours when there
are no calls at all.
I tried to do a bunch of googling to see if this was a common problem. I
did run across some suggestions to change the following sysctls which
did nothing to fix the issue ...
kern.eventtimer.timer: LAPIC
kern.timecounter.hardware: ACPI-fast
Does anyone have a suggestion on what I can do to trouble shoot this
issue? I'd rather not dump FreeBSD in favor of Linux ( which appears to
be the preferred freeswitch dev platform ), I'm just not sure where to
go from here.
TOP OUTPUT
-----------------
last pid: 6169; load averages: 47.40, 27.43, 18.03
up 18+01:07:12 20:07:26
34 processes: 1 running, 33 sleeping
CPU: 0.7% user, 0.0% nice, 1.2% system, 0.0% interrupt, 98.1% idle
Mem: 177M Active, 6300M Inact, 1184M Wired, 824M Buf, 252M Free
Swap: 2048M Total, 2048M Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
45288 root 281 -22 r30F 735M 547M select 2 194:15 0.00%
freeswitch
684 root 1 20 0 25448K 3916K select 1 0:42 0.00% ntpd
82924 rdj 3 20 0 89424K 17852K select 2 0:41 0.00% dialyd
540 root 1 20 0 14492K 2140K select 1 0:30 0.00%
syslogd
55847 zabbix 1 20 0 25552K 3164K nanslp 1 0:29 0.00%
zabbix_agentd
55849 zabbix 1 20 0 25552K 3244K accept 2 0:17 0.00%
zabbix_agentd
55850 zabbix 1 20 0 25552K 3236K accept 3 0:17 0.00%
zabbix_agentd
55848 zabbix 1 20 0 25552K 3176K select 2 0:16 0.00%
zabbix_agentd
741 root 1 20 0 24108K 5488K select 3 0:14 0.00%
sendmail
55851 zabbix 1 20 0 25552K 2928K nanslp 0 0:13 0.00%
zabbix_agentd
748 root 1 20 0 16592K 2260K nanslp 0 0:02 0.00% cron
73342 mgrooms 1 20 0 86476K 8012K select 3 0:01 0.00% sshd
73338 root 1 20 0 86476K 7932K select 0 0:00 0.00% sshd
460 root 1 20 0 13164K 4508K select 3 0:00 0.00% devd
56103 root 1 20 0 61208K 7492K select 3 0:00 0.00% sshd
744 smmsp 1 20 0 24108K 5100K pause 3 0:00 0.00%
sendmail
6163 mgrooms 1 20 0 21916K 2996K CPU0 0 0:00 0.00% top
6158 root 1 21 0 86476K 7932K select 0 0:00 0.00% sshd
73343 mgrooms 1 20 0 17656K 3492K wait 0 0:00 0.00% bash
73402 root 1 22 0 17656K 3492K ttyin 1 0:00 0.00% bash
73401 mgrooms 1 20 0 47716K 2808K wait 0 0:00 0.00% su
6161 mgrooms 1 20 0 86476K 7932K select 3 0:00 0.00% sshd
6162 mgrooms 1 20 0 17656K 3480K wait 0 0:00 0.00% bash
794 root 1 52 0 14488K 1980K ttyin 1 0:00 0.00% getty
799 root 1 52 0 14488K 1980K ttyin 1 0:00 0.00% getty
796 root 1 52 0 14488K 1980K ttyin 2 0:00 0.00% getty
798 root 1 52 0 14488K 1980K ttyin 3 0:00 0.00% getty
800 root 1 52 0 14488K 1980K ttyin 3 0:00 0.00% getty
795 root 1 52 0 14488K 1980K ttyin 0 0:00 0.00% getty
797 root 1 52 0 14488K 1980K ttyin 2 0:00 0.00% getty
801 root 1 52 0 14488K 1980K ttyin 0 0:00 0.00% getty
55846 zabbix 1 29 0 25552K 2872K wait 3 0:00 0.00%
zabbix_agentd
141 root 1 52 0 12332K 1788K pause 0 0:00 0.00%
adjkerntz
443 root 1 52 0 16704K 2024K select 3 0:00 0.00% moused
Thanks in advance,
-Matthew
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