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

[Martin Pycko]

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
>
>
>