46.3% interrupt
Dani Popa
dani at vipnet.ro
Mon Feb 21 17:44:02 GMT 2005
Hi all,
i have install freebsd 5.3 stable on compaq p3 633 and i have some problems with it. I do nat for a network with 800 users with ipnat and i use device polling and my network interfaces are : fxp (intel)
kern.polling.burst: 24
kern.polling.each_burst: 50
kern.polling.burst_max: 150
kern.polling.idle_poll: 0
kern.polling.poll_in_trap: 1
kern.polling.user_frac: 50
kern.polling.reg_frac: 20
kern.polling.short_ticks: 0
kern.polling.lost_polls: 11093211
kern.polling.pending_polls: 0
kern.polling.residual_burst: 0
kern.polling.handlers: 3
kern.polling.enable: 1
kern.polling.phase: 0
kern.polling.suspect: 3964467
kern.polling.stalled: 0
kern.polling.idlepoll_sleeping: 1
in the same time i have a scsi controler on that machine and 1 hdd scsi
on vmstat -i :
interrupt total rate
irq22: sym0 793796 2
irq23: fxp0 1 0
irq30: fxp1 1 0
irq31: fxp2 1 0
irq1: atkbd0 4 0
irq6: fdc0 8 0
irq8: rtc 38518980 128
irq14: ata0 31 0
irq15: ata1 3 0
irq0: clk 601377783 1998
Total 640690608 2129
but on top :
CPU states: 25.3% user, 0.0% nice, 56.4% system, 46.3% interrupt, 0.0% idle
my question is: why 46.3% interrupt , i don't see with vmstat -i any device use interrupt so many
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