[Asterisk-Users] X100P interrupt load

[Rich Adamson]

> Can anyone tell me what the "normal" number of
> interrupts per second is for an X100P card?
> 
> I've used FreeBSD 5.3 and a linux 2.6.11 kernel
> on the exact same hardware (only the disk changed)
> and `systat -vmstat 1` on FreeBSD and
> `procinfo -dS -n1` under Linux. For both, I'm
> seeing roughly 1000 interrupts per second on my
> X100p card. It was a bit worse under FreeBSD,
> and I experienced frequent lockups, hangs, and
> X100p malfunctions, so I switched to Linux. The
> machine is usable under Linux, but I still think
> that number of interrupts per second is a bit
> high.
> 
> My motherboard is an Abit BE6, and it seems to
> have some IRQ assignment problems, so I'm
> wondering what my baseline should be.
> 
> Also, I have a dual CPU PII motherboard with two
> X100P cards in it, and it's hitting about 1000
> interrupts per second per card too. Is this normal?
> How many interrupts per second can a given CPU
> sustain?

Yes, 1000 interrupts per second is the design objective.
If your equipment varies much from that, its a problem
that will likely show up as clicks or noise on pstn
calls. Same for the TDM card.