Subject: 2.0G -current MP debug info ..
To: None <port-alpha@netbsd.org>
From: Stephen M. Jones <smj@cirr.com>
List: port-alpha
Date: 07/19/2004 14:34:30
I hope that this is helpful (DIAGNOSTIC and DEBUG="-g" options set).
The hang occured an NFS client went down for a few minutes and
came back up. Within about 10 minutes of that, the machine hung.
I've also included the last 'top' and 'systat vmstat'
output. There were 44979 active vnodes at the time of the hang.
I was unable to take a dump.
db{0}> trace
cpu_Debugger() at netbsd:cpu_Debugger+0x4
panic() at netbsd:panic+0x1e8
console_restart() at netbsd:console_restart+0x74
XentRestart() at netbsd:XentRestart+0x90
--- console restart (from ipl 3) ---
wakeup() at netbsd:wakeup+0x68
nfsrv_wakenfsd() at netbsd:nfsrv_wakenfsd+0xc8
nfsrv_rcv() at netbsd:nfsrv_rcv+0x138
sowakeup() at netbsd:sowakeup+0xd8
udp4_sendup() at netbsd:udp4_sendup+0x14c
udp4_realinput() at netbsd:udp4_realinput+0x2ac
udp_input() at netbsd:udp_input+0x2ec
ip_input() at netbsd:ip_input+0xaa4
ipintr() at netbsd:ipintr+0xa0
netintr() at netbsd:netintr+0x88
softintr_dispatch() at netbsd:softintr_dispatch+0x194
exception_return() at netbsd:exception_return+0x7c
--- root of call graph ---
PID COMMAND STRUCT PROC * UAREA * VMSPACE/VM_MAP
12030 dd 0xfffffc000531ac70 0xfffffe000e24a000 0xfffffc00049feb08
3215 systat 0xfffffc000531aee8 0xfffffe000e25a000 0xfffffc00049ff088
11770 ksh 0xfffffc000531b650 0xfffffe000e26e000 0xfffffc00049ff4a8
2991 top 0xfffffc000531a9f8 0xfffffe000e266000 0xfffffc00049ffa28
11753 ksh 0xfffffc000531bb40 0xfffffe000e25e000 0xfffffc00049ff8c8
7784 telnetd 0xfffffc000531a780 0xfffffe000e256000 0xfffffc00049fedc8
2848 ksh 0xfffffc000531b3d8 0xfffffe000e252000 0xfffffc00049ff348
7077 ksh 0xfffffc000531b160 0xfffffe000e246000 0xfffffc00049ff1e8
7075 telnetd 0xfffffc0001c593c0 0xfffffe000e23e000 0xfffffc0001c642c0
2963 mount_mfs 0xfffffc000531b8c8 0xfffffe000e26a000 0xfffffc00049ff608
4581 ksh 0xfffffc0001c59638 0xfffffe000e286000 0xfffffc0001c64b00
11434 ksh 0xfffffc00049cdb38 0xfffffe000ded6000 0xfffffc0001c64160
7327 upclient 0xfffffc0006624c78 0xfffffe000e27a000 0xfffffc0034c32010
394 inetd 0xfffffc000531a018 0xfffffe000deda000 0xfffffc00049fe6e8
337 timed 0xfffffc00049cd648 0xfffffe000e24e000 0xfffffc00049fe848
102 rpc.lockd 0xfffffc00049cd8c0 0xfffffe000e242000 0xfffffc00049fe588
100 rpc.statd 0xfffffc00025a8770 0xfffffe000e1e6000 0xfffffc00049fe428
98 nfsd 0xfffffc00049cd3d0 0xfffffe000e23a000 0xfffffc00049fe2c8
97 nfsd 0xfffffc00049cd158 0xfffffe000e236000 0xfffffc00049fe168
96 nfsd 0xfffffc00049ccee0 0xfffffe000e232000 0xfffffc00049fe008
247 nfsd 0xfffffc00049ccc68 0xfffffe000e22e000 0xfffffc0001c65e40
220 nfsd 0xfffffc00049cc9f0 0xfffffe000e22a000 0xfffffc0001c65ce0
253 nfsd 0xfffffc00049cc778 0xfffffe000e226000 0xfffffc0001c65b80
211 nfsd 0xfffffc00049cc500 0xfffffe000e222000 0xfffffc0001c65a20
241 nfsd 0xfffffc00049cc288 0xfffffe000e21e000 0xfffffc0001c658c0
240 nfsd 0xfffffc00049cc010 0xfffffe000e21a000 0xfffffc0001c65760
246 nfsd 0xfffffc00025a9b30 0xfffffe000e216000 0xfffffc0001c65600
237 nfsd 0xfffffc00025a98b8 0xfffffe000e212000 0xfffffc0001c654a0
239 nfsd 0xfffffc00025a9640 0xfffffe000e20e000 0xfffffc0001c65340
238 nfsd 0xfffffc00025a93c8 0xfffffe000e20a000 0xfffffc0001c651e0
218 nfsd 0xfffffc00025a9150 0xfffffe000e206000 0xfffffc0001c65080
242 nfsd 0xfffffc00025a8ed8 0xfffffe000e202000 0xfffffc0001c64f20
217 nfsd 0xfffffc00025a8c60 0xfffffe000e1f6000 0xfffffc0001c64dc0
235 nfsd 0xfffffc00025a89e8 0xfffffe000e1ea000 0xfffffc0001c64c60
236 nfsd 0xfffffc0001c598b0 0xfffffe000e1f2000 0xfffffc0001c646e0
212 mountd 0xfffffc00025a84f8 0xfffffe000e1fe000 0xfffffc0001c649a0
184 ypbind 0xfffffc00025a8280 0xfffffe000e1fa000 0xfffffc0001c64840
158 rpcbind 0xfffffc00025a8008 0xfffffe000e1ee000 0xfffffc0001c64580
127 syslogd 0xfffffc0001c59b28 0xfffffe000dede000 0xfffffc0001c64420
8 aiodoned 0xfffffc0001c59148 0xfffffe000ded2000 0xfffffc0000623738
7 ioflush 0xfffffc0001c58ed0 0xfffffe000dece000 0xfffffc0000623738
>6 pagedaemon 0xfffffc0001c58c58 0xfffffe000deca000 0xfffffc0000623738
5 atabus0 0xfffffc0001c589e0 0xfffffe000dec6000 0xfffffc0000623738
4 scsibus1 0xfffffc0001c58768 0xfffffe000dec2000 0xfffffc0000623738
3 isp0:fc_th 0xfffffc0001c584f0 0xfffffe000debe000 0xfffffc0000623738
2 scsibus0 0xfffffc0001c58278 0xfffffe000deba000 0xfffffc0000623738
1 init 0xfffffc0001c58000 0xfffffe000deb6000 0xfffffc0001c64000
0 swapper 0xfffffc0000623a58 0xfffffc0000200000 0xfffffc0000623738
db{0}> ps/l
PID LID S FLAGS STRUCT LWP * UAREA * WAIT
12030 1 3 0x4 0xfffffc0004a325a8 0xfffffe000e24a000 biowait
3215 1 3 0x84 0xfffffc0004a32e18 0xfffffe000e25a000 ttyin
11770 1 3 0x80 0xfffffc0004a32c38 0xfffffe000e26e000 pause
2991 1 3 0x84 0xfffffc0004a330e8 0xfffffe000e266000 poll
11753 1 3 0x80 0xfffffc0004a32f08 0xfffffe000e25e000 pause
7784 1 3 0x84 0xfffffc0004a32878 0xfffffe000e256000 poll
2848 1 3 0x80 0xfffffc0004a32b48 0xfffffe000e252000 pause
7077 1 3 0x80 0xfffffc0004a32a58 0xfffffe000e246000 pause
7075 1 3 0x84 0xfffffc0004a32968 0xfffffe000e23e000 poll
2963 1 2 0x4 0xfffffc0004a32008 0xfffffe000e26a000
4581 1 3 0x80 0xfffffc0001c68870 0xfffffe000e286000 ttyin
11434 1 3 0x80 0xfffffc0001c68780 0xfffffe000ded6000 pause
7327 1 3 0x80 0xfffffc0004a332c8 0xfffffe000e27a000 pause
394 1 3 0x80 0xfffffc0004a321e8 0xfffffe000deda000 kqread
337 1 3 0x80 0xfffffc0004a322d8 0xfffffe000e24e000 poll
102 1 3 0x80 0xfffffc0004a320f8 0xfffffe000e242000 select
100 1 3 0x84 0xfffffc0001c68e10 0xfffffe000e1e6000 select
98 1 3 0x84 0xfffffc0001c69e00 0xfffffe000e23a000 nfsd
97 1 3 0x84 0xfffffc0001c69d10 0xfffffe000e236000 nfsd
96 1 3 0x84 0xfffffc0001c69c20 0xfffffe000e232000 nfsd
247 1 3 0x84 0xfffffc0001c69b30 0xfffffe000e22e000 nfsd
220 1 3 0x84 0xfffffc0001c69a40 0xfffffe000e22a000 nfsd
253 1 3 0x84 0xfffffc0001c69950 0xfffffe000e226000 nfsd
211 1 3 0x84 0xfffffc0001c69860 0xfffffe000e222000 nfsd
241 1 3 0x84 0xfffffc0001c69770 0xfffffe000e21e000 nfsd
240 1 3 0x84 0xfffffc0001c69680 0xfffffe000e21a000 nfsd
246 1 3 0x84 0xfffffc0001c69590 0xfffffe000e216000 nfsd
237 1 3 0x84 0xfffffc0001c694a0 0xfffffe000e212000 nfsd
239 1 3 0x84 0xfffffc0001c693b0 0xfffffe000e20e000 nfsd
238 1 3 0x84 0xfffffc0001c692c0 0xfffffe000e20a000 nfsd
218 1 3 0x84 0xfffffc0001c691d0 0xfffffe000e206000 nfsd
242 1 3 0x84 0xfffffc0001c690e0 0xfffffe000e202000 nfsd
217 1 3 0x84 0xfffffc0001c68ff0 0xfffffe000e1f6000 nfsd
235 1 3 0x84 0xfffffc0001c68f00 0xfffffe000e1ea000 nfsd
236 1 3 0x84 0xfffffc0001c68b40 0xfffffe000e1f2000 nfsd
212 1 3 0x84 0xfffffc0001c68d20 0xfffffe000e1fe000 select
184 1 3 0x84 0xfffffc0001c68c30 0xfffffe000e1fa000 select
158 1 3 0x80 0xfffffc0001c68a50 0xfffffe000e1ee000 poll
127 1 3 0x80 0xfffffc0001c68960 0xfffffe000dede000 poll
8 1 3 0x4 0xfffffc0001c68690 0xfffffe000ded2000 aiodoned
7 1 3 0x4 0xfffffc0001c685a0 0xfffffe000dece000 syncer
>6 > 1 7 0x4 0xfffffc0001c684b0 0xfffffe000deca000
5 1 3 0x4 0xfffffc0001c683c0 0xfffffe000dec6000 atath
4 1 3 0x4 0xfffffc0001c682d0 0xfffffe000dec2000 sccomp
3 1 3 0x4 0xfffffc0001c681e0 0xfffffe000debe000 fcclnup
2 1 3 0x4 0xfffffc0001c680f0 0xfffffe000deba000 sccomp
1 1 3 0x80 0xfffffc0001c68000 0xfffffe000deb6000 wait
0 1 3 0x4 0xfffffc0000623ce0 0xfffffc0000200000 scheduler
db{0}> ps/n
PID PPID PGRP UID S FLAGS LWPS COMMAND WAIT
12030 11770 11770 0 2 0x4002 1 dd biowait
3215 2848 3215 0 2 0x4102 1 systat ttyin
11770 4581 11770 0 2 0x4002 1 ksh pause
2991 11753 2991 100 2 0x4002 1 top poll
11753 7784 11753 100 2 0x4002 1 ksh pause
7784 394 394 0 2 0x4000 1 telnetd poll
2848 7077 2848 0 2 0x4002 1 ksh pause
7077 7075 7077 100 2 0x4002 1 ksh pause
7075 394 394 0 2 0x4000 1 telnetd poll
2963 1 2963 0 2 0 1 mount_mfs
4581 11434 4581 0 2 0x4002 1 ksh ttyin
11434 1 11434 100 2 0x4002 1 ksh pause
7327 1 7435 32767 2 0x2 1 upclient pause
394 1 394 0 2 0 1 inetd kqread
337 1 337 0 2 0 1 timed poll
102 1 102 0 2 0 1 rpc.lockd select
100 1 100 0 2 0 1 rpc.statd select
98 1 219 0 2 0 1 nfsd nfsd
97 1 219 0 2 0 1 nfsd nfsd
96 1 219 0 2 0 1 nfsd nfsd
247 1 219 0 2 0 1 nfsd nfsd
220 1 219 0 2 0 1 nfsd nfsd
253 1 219 0 2 0 1 nfsd nfsd
211 1 219 0 2 0 1 nfsd nfsd
241 1 219 0 2 0 1 nfsd nfsd
240 1 219 0 2 0 1 nfsd nfsd
246 1 219 0 2 0 1 nfsd nfsd
237 1 219 0 2 0 1 nfsd nfsd
239 1 219 0 2 0 1 nfsd nfsd
238 1 219 0 2 0 1 nfsd nfsd
218 1 219 0 2 0 1 nfsd nfsd
242 1 219 0 2 0 1 nfsd nfsd
217 1 219 0 2 0 1 nfsd nfsd
235 1 219 0 2 0 1 nfsd nfsd
236 1 219 0 2 0 1 nfsd nfsd
212 1 212 0 2 0 1 mountd select
184 1 184 0 2 0 1 ypbind select
158 1 158 0 2 0 1 rpcbind poll
127 1 127 0 2 0 1 syslogd poll
8 0 0 0 2 0x20200 1 aiodoned aiodone
7 0 0 0 2 0x20200 1 ioflush syncer
>6 0 0 0 2 0x20200 1 pagedaemon
5 0 0 0 2 0x20200 1 atabus0 atath
4 0 0 0 2 0x20200 1 scsibus1 sccomp
3 0 0 0 2 0x20200 1 isp0:fc_thrd fcclnup
2 0 0 0 2 0x20200 1 scsibus0 sccomp
1 0 1 0 2 0x4000 1 init wait
0 -1 0 0 2 0x20200 1 swapper schedul
db{0}> ps/w
PID COMMAND EMUL PRI UTIME STIME WAIT-MSG WAIT-CHANNEL
12030 dd netbsd 17 0.0 5.2 biowait netbsd:ddb_regp+0x9a
f7cd8
3215 systat netbsd 25 0.5 0.4 ttyin netbsd:ddb_regp+0x15
c9070
11770 ksh netbsd 40 0.0 0.0 pause 0xfffffc003ab42c98
2991 top netbsd 24 1.8 1.2 poll netbsd:selwait
11753 ksh netbsd 40 0.0 0.0 pause netbsd:ddb_regp+0x25
cee08
7784 telnetd netbsd 24 1.0 0.7 poll netbsd:selwait
2848 ksh netbsd 40 0.0 0.1 pause 0xfffffc003ab42090
7077 ksh netbsd 40 0.0 0.1 pause 0xfffffc002010c0c0
7075 telnetd netbsd 24 0.1 0.3 poll netbsd:selwait
2963 mount_mfs netbsd 17 0.0 26.2
4581 ksh netbsd 25 0.0 0.1 ttyin netbsd:ddb_regp+0x15
c8d40
11434 ksh netbsd 40 0.0 0.0 pause netbsd:ddb_regp+0x16
31930
7327 upclient netbsd 40 0.1 0.9 pause 0xfffffc002010ccc8
394 inetd netbsd 24 0.0 1.1 kqread netbsd:ddb_regp+0x56
3ed28
337 timed netbsd 24 0.0 0.1 poll netbsd:selwait
102 rpc.lockd netbsd 24 0.0 0.1 select netbsd:selwait
100 rpc.statd netbsd 24 0.0 0.2 select netbsd:selwait
98 nfsd netbsd 24 0.0 813.7 nfsd 0xfffffe00004e9000
97 nfsd netbsd 24 0.0 801.1 nfsd 0xfffffe00004e9200
96 nfsd netbsd 24 0.0 783.0 nfsd 0xfffffe00004e9400
247 nfsd netbsd 24 0.0 840.6 nfsd 0xfffffe00004e9600
220 nfsd netbsd 24 0.0 806.0 nfsd 0xfffffe00004e9800
253 nfsd netbsd 24 0.0 794.0 nfsd 0xfffffe00004e9a00
211 nfsd netbsd 24 0.0 792.9 nfsd 0xfffffe00004e9c00
241 nfsd netbsd 24 0.0 829.5 nfsd 0xfffffe00004e9e00
240 nfsd netbsd 24 0.0 794.2 nfsd 0xfffffe0000011600
246 nfsd netbsd 24 0.0 802.9 nfsd 0xfffffe0000490600
237 nfsd netbsd 24 0.0 802.9 nfsd 0xfffffe0000490800
239 nfsd netbsd 24 0.0 807.0 nfsd 0xfffffe0000491400
238 nfsd netbsd 24 0.0 818.2 nfsd 0xfffffe0000490a00
218 nfsd netbsd 24 0.0 795.1 nfsd 0xfffffe0000490e00
242 nfsd netbsd 24 0.0 826.3 nfsd 0xfffffe0000491600
217 nfsd netbsd 24 0.0 810.5 nfsd 0xfffffe0000491000
235 nfsd netbsd 24 0.0 799.0 nfsd 0xfffffe0000491200
236 nfsd netbsd 24 0.0 795.4 nfsd 0xfffffe0000490c00
212 mountd netbsd 24 0.0 0.2 select netbsd:selwait
184 ypbind netbsd 24 0.6 12.7 select netbsd:selwait
158 rpcbind netbsd 24 0.2 2.8 poll netbsd:selwait
127 syslogd netbsd 24 0.0 1.1 poll netbsd:selwait
8 aiodoned netbsd 4 0.0 567.7 aiodoned netbsd:uvm+0x54
7 ioflush netbsd 40 0.0 188.4 syncer netbsd:rushjob
>6 pagedaemon netbsd 4 0.0 10.2
5 atabus0 netbsd 16 0.0 0.0 atath 0xfffffe000005f6f0
4 scsibus1 netbsd 16 0.0 0.0 sccomp 0xfffffe000006c130
3 isp0:fc_thrd netbsd 16 0.0 0.0 fcclnup 0xfffffe000006c300
2 scsibus0 netbsd 16 0.0 1.2 sccomp 0xfffffe0000068130
1 init netbsd 32 0.0 0.0 wait netbsd:ddb_regp+0x16
28d28
0 swapper netbsd 4 0.0 1.5 scheduler netbsd:proc0
load averages: 3.60, 3.94, 4.85 19:02:27
48 processes: 47 sleeping, 1 on processor
CPU0 states: 0.0% user, 0.0% nice, 1.2% system, 4.2% interrupt, 94.5% idle
CPU1 states: 0.0% user, 0.0% nice, 12.4% system, 0.0% interrupt, 87.6% idle
Memory: 503M Act, 252M Inact, 552K Wired, 3624K Exec, 356M File, 1328K Free
Swap: 1028M Total, 455M Used, 572M Free
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
238 root 2 0 80K 584K nfsd/1 13:42 9.72% 9.72% nfsd
2963 root -5 0 216K 393M biowai/1 0:26 0.05% 0.05% mount_mfs
12030 root -5 0 2096K 1688K biowai/0 0:05 0.05% 0.05% dd
247 root 2 0 80K 584K nfsd/0 14:04 0.00% 0.00% nfsd
241 root 2 0 80K 584K nfsd/1 13:53 0.00% 0.00% nfsd
242 root 2 0 80K 584K nfsd/0 13:50 0.00% 0.00% nfsd
98 root 2 0 80K 584K nfsd/1 13:37 0.00% 0.00% nfsd
217 root 2 0 80K 584K nfsd/1 13:34 0.00% 0.00% nfsd
239 root 2 0 80K 584K nfsd/1 13:31 0.00% 0.00% nfsd
220 root 2 0 80K 584K nfsd/0 13:30 0.00% 0.00% nfsd
237 root 2 0 80K 584K nfsd/1 13:27 0.00% 0.00% nfsd
246 root 2 0 80K 584K nfsd/1 13:27 0.00% 0.00% nfsd
97 root 2 0 80K 584K nfsd/0 13:25 0.00% 0.00% nfsd
235 root 2 0 80K 584K nfsd/1 13:23 0.00% 0.00% nfsd
218 root 2 0 80K 584K nfsd/1 13:19 0.00% 0.00% nfsd
236 root 2 0 80K 584K nfsd/1 13:19 0.00% 0.00% nfsd
253 root 2 0 80K 584K nfsd/1 13:18 0.00% 0.00% nfsd
240 root 2 0 80K 584K nfsd/0 13:18 0.00% 0.00% nfsd
211 root 2 0 80K 584K nfsd/1 13:17 0.00% 0.00% nfsd
96 root 2 0 80K 584K nfsd/1 13:07 0.00% 0.00% nfsd
8 root -18 0 0K 26M aiodon/1 9:30 0.00% 0.00% [aiodoned]
7 root 18 0 0K 26M syncer/1 3:09 0.00% 0.00% [ioflush]
184 root 2 0 320K 904K select/1 0:14 0.00% 0.00% ypbind
6 root -18 0 0K 26M pgdaem/0 0:07 0.00% 0.00% [pagedaemon]
2991 smj 28 0 488K 1296K CPU/1 0:03 0.00% 0.00% top
158 root 2 0 432K 0K poll/1 0:03 0.00% 0.00% <rpcbind>
7327 nobody 18 0 192K 0K pause/0 0:01 0.00% 0.00% <upclient>
7784 root 2 0 232K 1760K poll/0 0:01 0.00% 0.00% telnetd
394 root 2 0 336K 0K kqread/1 0:01 0.00% 0.00% <inetd>
127 root 2 0 232K 0K poll/0 0:01 0.00% 0.00% <syslogd>
2 root -6 0 0K 26M sccomp/1 0:01 0.00% 0.00% [scsibus0]
0 root -18 0 0K 26M schedu/1 0:01 0.00% 0.00% [swapper]
7077 smj 18 0 384K 0K pause/0 0:00 0.00% 0.00% <ksh>
11753 smj 18 0 384K 0K pause/0 0:00 0.00% 0.00% <ksh>
11434 smj 18 0 376K 0K pause/1 0:00 0.00% 0.00% <ksh>
2848 root 18 0 368K 0K pause/0 0:00 0.00% 0.00% <ksh>
11770 root 18 0 360K 0K pause/1 0:00 0.00% 0.00% <ksh>
1 root 10 0 120K 0K wait/1 0:00 0.00% 0.00% <init>
3215 root 3 0 632K 1496K ttyin/1 0:00 0.00% 0.00% systat
4581 root 3 0 360K 0K ttyin/1 0:00 0.00% 0.00% <ksh>
7075 root 2 0 232K 1760K poll/0 0:00 0.00% 0.00% telnetd
212 root 2 0 528K 392K select/1 0:00 0.00% 0.00% mountd
100 root 2 0 320K 296K select/1 0:00 0.00% 0.00% rpc.statd
337 root 2 0 472K 0K poll/0 0:00 0.00% 0.00% <timed>
102 root 2 0 344K 0K select/1 0:00 0.00% 0.00% <rpc.lockd>
3 root -6 0 0K 26M fcclnu/0 0:00 0.00% 0.00% [isp0:fc_thr
4 root -6 0 0K 26M sccomp/0 0:00 0.00% 0.00% [scsibus1]
5 root -6 0 0K 26M atath/0 0:00 0.00% 0.00% [atabus0]
3 users Load 3.60 3.94 4.85 Mon Jul 19 19:02:28
Proc:r d s w Csw Trp Sys Int Sof Flt PAGING SWAPPING
2 8 873 6812 3930 62 in out in out
ops 36 7
6.8% Sy 0.1% Us 0.0% Ni 2.1% In 91.0% Id pages 47
| | | | | | | | | | |
===%% forks
fkppw
memory totals (in kB) 15428 Interrupts fksvm
real virtual free soft serial pwait
Active 515976 982312 512 3899 soft net 36 relck
All 1028384 1494720 586424 28 soft clock 36 rlkok
1024 cpu0 clock noram
Namei Sys-cache Proc-cache 4909 cpu0 device ndcpy
Calls hits % hits % 2140 cpu0 ipi fltcp
6 6 100 2140 shootdown ipi zfod
cpu0 imb ipi cow
Disks: md0 sd0 synch fpu ipi 32 fmin
seeks discard fpu ipi 42 ftarg
xfers 129 1024 cpu1 clock 32265 itarg
bytes 5863K 132 cpu1 ipi 69 wired
%busy 99.8 1 microset ipi pdfre
131 shootdown ipi 688 pdscn
cpu1 imb ipi
synch fpu ipi
discard fpu ipi
isa irq 4
cpu1 ast ipi