Subject: acpi: 30k+/sec interrupts on ioapic0 pin 9
To: None <port-i386@netbsd.org>
From: David Brownlee <abs@netbsd.org>
List: port-i386
Date: 07/21/2003 09:59:59
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Content-ID: <Pine.NEB.4.53.0307181049041.201@forsaken.emlyn.absd.org>
Tried a -current kernel with acpi on a Dell PE1300 (with latest
A12 BIOS which is supposed to support Windows server 2003). Its
a dual proc box with only one proc enabled.
The machine is exceptionally slow, and 'systat vmstat' reports
well over 30,000 interrupts/sec on 'ioapic0 pin 9'. The system
at idle shows 80% interrupt CPU time. The relevant lines from
systat vmstat are:
39762 Interrupts
151 cpu0 softclock
cpu0 softnet
1024 cpu0 timer
38587 ioapic0 pin 9
ioapic0 pin 16
ioapic0 pin 18
dmesg attached, kernel config at
ftp://ftp.netbsd.org/pub/incoming/abs/_IPSEC_
Enabling both procs bumps up the number of interrupts a little:
79225 Interrupts
208 cpu0 softclock
cpu0 softnet
1024 cpu0 timer
FPU flush IPI
FPU synch IPI
TLB shootdown I
cpu1 softnet
1024 cpu1 timer
1 timeset IPI
FPU synch IPI
TLB shootdown I
76968 ioapic0 pin 9
ioapic0 pin 16
ioapic0 pin 18
Enabling MPACPI instead of MPBIOS causes autoconfig to hang after
resetting the scsi bus.
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