[Asterisk-Users] Dual T400P, SMP, performance issues

[asterisk at billheckel.com]

Hmmmm, I to appear to have an odd mix of interrupts.  It seems that the second CPU doesn't do much
at all on my dual Xeon...

            CPU0       CPU1
   0:   40652580          0    IO-APIC-edge  timer
   1:        926          0    IO-APIC-edge  keyboard
   2:          0          0          XT-PIC  cascade
   6:          0          0   IO-APIC-level  usb-ohci
   8:          1          0    IO-APIC-edge  rtc
  12:        308          0    IO-APIC-edge  PS/2 Mouse
  14:          2          0    IO-APIC-edge  ide0
  20:  406481379          0   IO-APIC-level  tor2
  24:          0          0   IO-APIC-level  tor2
  28:    4516659          0   IO-APIC-level  eth0
  30:     911870          0   IO-APIC-level  aacraid
NMI:          0          0
LOC:   40653025   40653047
ERR:          0
MIS:          0

I haven't enables the second card yet but will be enabling soon.  I should probably recompile * and
zaptel for SMP though I thought I had...

Bill


Martin Pycko wrote:
> Are you sure that you compiled zaptel for __SMP__ ?
> Edit your zaptel/Makefile.
> 
>   0:   75283844   75241320   75286285   75247088    IO-APIC-edge  timer
>   1:          1          0          1          1    IO-APIC-edge  keyboard
>   2:          0          0          0          0          XT-PIC  cascade
>   3:          0          0          0          0   IO-APIC-level  usb-ohci
>   8:          1          0          0          0    IO-APIC-edge  rtc
>  15:          1          0          0          1    IO-APIC-edge  ide1
>  16:   22134870   22120997   22135905   22122829   IO-APIC-level  eth0
>  25:       4670       4548       4614       4518   IO-APIC-level  tor2
> 
> All the four CPU's should have IRQ's like in the example above.
> 
> Martin
> 
> On Mon, 9 Jun 2003, Alex Zarubin wrote:
> 
> 
>>Hi,
>>
>>We are trying to validate Asterisk as a media gateway PRI <-> SIP with two
>>T400P (8 T1s) per box. The first
>>experience with BOX1 (Compaq, 2.53 GHz, 1 Gb RAM) and just one T400P was
>>encouraging - on the load
>>test with 3 T1s worth of calls we had on average 75% idle CPU.
>>
>>Not so with BOX2 (Dell, single 2.6 GHz Xeon, 1 Gb RAM, 2 T400P) and BOX3
>>(Dell, dual 2.6 GHz Xeon,
>>2 Gb RAM, 2 T400P, asterisk/zaptel is built with SMP support).
>>
>>On the similar load test (as with the BOX1) BOX2 was showing 0% idle CPU 70%
>>of the time. Just 3 T1s
>>out of 8.
>>
>>On the load test with just 2 T1s BOX3 was very close to 0% idle on CPU0,
>>CPU1 was at 95% idle.
>>The process ksoftirqd_CPU0 was close to the top of the 'top', with
>>/proc/interrupts showing tor2 related
>>numbers growing very fast. We had 2 T1s plugged into the first T400P board,
>>with nothing going into the second,
>>but the number of interrupts for the both boards was growing at the same
>>pace. Here are the interrupts
>>(after the box reboot, so they are not that big as they were) - do they look
>>OK?
>>
>>
>>            CPU0       CPU1       CPU2       CPU3
>>  0:     122556          0          0          0    IO-APIC-edge  timer
>>  1:          4          0          0          0    IO-APIC-edge  keyboard
>>  2:          0          0          0          0          XT-PIC  cascade
>>  5:          0          0          0          0   IO-APIC-level  usb-ohci
>>  8:          1          0          0          0    IO-APIC-edge  rtc
>> 12:         20          0          0          0    IO-APIC-edge  PS/2 Mouse
>> 14:         23          0          2          0    IO-APIC-edge  ide0
>> 20:     516930          0          0          0   IO-APIC-level  tor2
>> 24:     516524          0          0          0   IO-APIC-level  tor2
>> 28:      10600          0          0          0   IO-APIC-level  eth0
>> 29:       4837          0          0          0   IO-APIC-level  eth1
>> 30:      24831          0          0          0   IO-APIC-level  aacraid
>>NMI:          0          0          0          0
>>LOC:     122430     122429     122429     122428
>>ERR:          0
>>MIS:          0
>>
>>Not sure what went wrong. Any suggestions on how to work with 2 T400P in a
>>box (without hurting performance)
>>and how to get advantage of SMP for Asterisk would be appreciated.
>>
>>Any known Linux kernel related issues (2.4.20-13.7smp #1 SMP for BOX3 )?
>>
>>Thank you.
>>
>>Alex Zarubin
>>
>>
>>
> 
> 
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