[Asterisk-Users] Load spikes with 1.0.10

[Mojo with Horan & Company, LLC]

Are your interrupts getting hogged by anything else?  I'd recommend 
http://www.voip-info.org/wiki/view/Asterisk+PCI+bus+Troubleshooting if 
you haven't already read it.  Have you tried booting with noapic kernel 
option?  You may then have to shuffle cards around to make your sangoma 
not share any interrupts <shrug> hth :)

moj

Gavin Hamill wrote:
> Hi, I have a trivial setup on a 2.4GHz Xeon Dell PE 1750 SCSI machine 
> dealing with 4 ports of E1 in an 'inline PBX' arrangement.
> 
> My extensions.conf is simply:
> 
> [general]
> static=yes
> writeprotect=yes
> 
> [frompstn]
> exten => _31.,1,Dial(Zap/g2/${EXTEN})
> exten => _31.,2,Congestion
> 
> [fromaxxess]
> exten => _13.,1,Dial(SIP/${EXTEN},,h)
> exten => _13.,2,Congestion
> exten => _31.,1,Dial(Zap/g2/${EXTEN})
> exten => _31.,2,Congestion
> include => outbound
> 
> [outbound]
> exten => _X.,1,Dial(Zap/g1/${EXTEN})
> exten => _X.,2,Congestion
> 
> We have a full 30-channel PRI and a 4-channel partial PRI and are 
> experiencing load spikes that I can't find the source of.
> 
> The machine Debian sarge on the default 2.6.8-2-686 kernel, and no other 
> daemons are running than sshd.
> 
> The machine is doing no IP work - purely TDM, yet on a Xeon 2.4GHz 
> machine, the load average is sitting at 0.6 with 40 active Zap channels 
> (i.e. 20 live calls) and will randomly jump to 2 (with call quality 
> starting to stutter)
> 
> A few seconds of vmstat:
> 
> 
> procs -----------memory---------- ---swap-- -----io---- --system-- 
> ----cpu----
>  r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy 
> id wa
>  7  0      0 223560   1276 223040    0    0     3    10   83    94  1  2 
> 97  0
>  0  0      0 223552   1284 223040    0    0     0    16 5128  3461  1  0 
> 98  1
>  0  0      0 223552   1284 223040    0    0     0     0 5094  3319 10  9 
> 81  0
>  0  0      0 223552   1284 223040    0    0     0    16 5130  2955  1 10 
> 89  0
>  0  0      0 223552   1292 223040    0    0     0    60 5121  2918  0  1 
> 97  2
>  0  0      0 223552   1292 223040    0    0     0     0 5031  2936  1  0 
> 99  0
> 
> Does this sound about normal for what is just shuffling data between 
> ports of the Sangoma A104? I want to record the call data with the 
> 'Monitor' application but this just causes the load to increase even 
> more (even though 'hdparm' shows 70MB/sec disk transfer with low 
> user+system CPU usage)
> 
>  /proc/interrupts is
>             CPU0
>   0:  423253622    IO-APIC-edge  timer
>   1:        175    IO-APIC-edge  i8042
>   9:          0   IO-APIC-level  acpi
>  11:          0   IO-APIC-level  ohci_hcd
>  12:         58    IO-APIC-edge  i8042
>  15:         13    IO-APIC-edge  ide1
> 177:     533330   IO-APIC-level  ioc0
> 185:         29   IO-APIC-level  ioc1
> 193: 1311243931   IO-APIC-level  wanpipe1, wanpipe2, wanpipe3, wanpipe4
> 201:   13289965   IO-APIC-level  eth0
> 217:    5420038   IO-APIC-level  eth2
> NMI:          0
> LOC:  423311408
> ERR:          0
> MIS:          0
> 
> Help! :)
> 
> Cheers,
> Gavin.
> 
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-- 
Mojo <mojo at horanappraisals.com>
Office Manger, Horan & Company, LLC
(907) 747-6666 x112