%cpu (usr/system/idle) disappears on AMD64/5.3

[Jeff Behl]

On a 2 proc amd64 system, I lose cpu stats after being up for a period 
of time (~5 days in this case).  Anyone know what's up with this?  It's 
happened a number of times, with the only fix that I know of being a 
reboot.  Any help greatly appreciated (we're trying to benchmark this 
system for production use).  Info below:

last pid: 16818;  load averages:  0.19,  0.15,  0.10    up 6+00:05:00  
20:53:12
34 processes:  1 running, 33 sleeping
CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  0.0% 
idle
Mem: 97M Active, 732M Inact, 274M Wired, 2772K Cache, 214M Buf, 687M Free
Swap: 4069M Total, 9900K Used, 4059M Free


FreeBSD www1.cdn.sjc 5.3-RELEASE FreeBSD 5.3-RELEASE #1: Mon Nov  8 
20:25:59 PST 2004     root at www1.cdn.sjc:/usr/obj/usr/src/sys/SMP  amd64


8:53PM  up 6 days, 5 mins, 3 users, load averages: 0.14, 0.14, 0.09