Linux 2.4.19ac3rc3 on IBM x330/x340 SMP - "ps" time skew

[David Luyer]

In Linux 2.4.19ac3rc3 on IBM x330/x340 SMP systems we're seeing this:

luyer@praxis8:~$ ps auxwww | tail -1
luyer     1025  0.0  0.0  1276  352 pts/2    S    Aug06   0:00 tail -1
luyer@praxis8:~$ date
Wed Jul 31 12:35:16 EST 2002

luyer@praxis8:~$ cat /proc/$$/stat
1053 (bash) S 1052 1053 1053 34818 1056 0 99 56 294 99 1 0 0 0 15 0 0 0
49574810 2244608 316 4294
967295 134512640 134997952 3221225056 3221224264 1074760249 0 65536
3686404 1266761467 3222376853
 0 0 17 0
luyer@praxis8:~$ cat /proc/uptime
495803.96 481602.41
luyer@praxis8:~$ cat /proc/stat
cpu  1570707 3 1853018 95737544
cpu0 685268 1 876356 48019011
cpu1 885439 2 976662 47718533
page 1720960 27277642
swap 25 534
intr 244887271 49580636 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1742620 0 16 16 193563981 0
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0
 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0
disk_io: (8,0):(988585,67688,1019318,920897,8472052)
(8,1):(1832129,206174,2422602,1625955,460832
32)
ctxt 81010049
btime 1027587797
processes 98440

Note the time skew in the "ps" output (the clock time is correct).

This is happening on all ten IBM x330/x340's we're running this in SMP
on this kernel.

We have fourteen Intel ISP 2150 servers running UP with IO-APIC on SMP
motherboards which are not experiencing this issue.

David.
--
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