Subject: Re: i386 1.4P hangs randomly?
To: maximum entropy <entropy@zippy.bernstein.com>
From: Manuel Bouyer <bouyer@antioche.lip6.fr>
List: current-users
Date: 01/22/2000 14:31:28
On Fri, Jan 21, 2000 at 10:22:44PM -0500, maximum entropy wrote:
> Well, that could cause hangs, but I'm seeing the same symptoms with
> 1.4P, and a few other people have posted "me too" about this happening
> to them.  Maybe all of our CPU fans have y2k bugs? :-)
> 
> Every time my system has hung with 1.4P it has been during a "make
> build" -- high disk IO and lots of process creation.
> 
> Under normal load the system is fine.  High CPU utilization by itself
> doesn't seem to trigger it.

So, so it's not a overheating problem. In my case a simple "while(1); end"
loop was enouth to get it look up.

On a related note I've got my home machine in a strange state yesterday,
where any process creation would fail "no more processes".
It was not a limit problem, kernel didn't print any diagnostic message
and running processes were fine (I had a few xterm/ssh to other machines
and was able to use them just fine). Looks like a memory allocation
failed somewhere.

I got a core dump, here what I've been able to get:
rochebonne#/var/crash>vmstat -m -M netbsd.10.core -N netbsd.10
Kmem statistics are not being gathered by the kernel.
Memory resource pool statistics
Name        Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
phpool        40       54    0       25     1     0     1     1     0   inf    0
pmappl        68     3609    0     3555     2     0     2     2     0   inf    0
vmsppl       180     3609    0     3555     4     1     3     4     0   inf    0
vmmpepl       60    75421    0    74452    19     3    16    19     0   inf    0
uaoeltpl      80       14    0        4     1     0     1     1     0   inf    0
aobjpl        52        1    0        1     1     1     0     1     0   inf    0
amappl        40    29647    0    29138     8     2     6     7     0   inf    0
mbpl         128   338660    0   338649     7     5     2     3     1   inf    1
mclpl       2048   179135    0   179134    27    20     7    15     4   256    6
sockpl       164     1256    0     1203     5     2     3     4     0   inf    0
ttypl        228       42    0        0     3     0     3     3     0   inf    0
procpl       320     3614    0     3555     7     1     6     7     0   inf    0
pgrppl        24      491    0      447     1     0     1     1     0   inf    0
pcredpl       24     3614    0     3555     1     0     1     1     0   inf    0
plimitpl     156     1405    0     1395     1     0     1     1     0   inf    0
rusgepl       72     3555    0     3555     3     2     1     1     0   inf    1
filepl        48   208668    0   208537     2     0     2     2     0   inf    0
cwdipl        12     3611    0     3555     1     0     1     1     0   inf    0
vnodepl      204    63680    0        0  3352     0  3352  3352     0   inf    0
ncachepl      72      778    0        0    14     0    14    14     0   inf    0
ffsinopl     212     5757    0     2261   200    16   184   184     0   inf    0
ext2fsinopl  212        0    0        0     0     0     0     0     0   inf    0
lfsinopl     212    72059    0    11889  3329     0  3329  3329     0   inf  138
nfsnodepl    204        1    0        0     1     0     1     1     0   inf    0
nfsvapl      100        1    0        0     1     0     1     1     0   inf    0
cd9660nopl   108        0    0        0     0     0     0     0     0   inf    0
msdosnopl    100        0    0        0     0     0     0     0     0   inf    0
wdcspl        48    38415    0    38414     1     0     1     1     0   inf    0
scxspl       120     2638    0     2638     4     3     1     1     0   inf    1
extent        20     1245    0     1170     1     0     1     1     0   inf    0
rtentpl      124        9    0        0     1     0     1     1     0   inf    0
tcpcbpl      176       46    0       37     1     0     1     1     0   inf    0
synpl        168       19    0       19     1     1     0     1     0   inf    0
swp buf      148     1501    0     1501     1     0     1     1     0   inf    1
swp vnx       20        0    0        0     0     0     0     0     0   inf    0
swp vnd      124        0    0        0     0     0     0     0     0   inf    0
sigapl       840     3611    0     3555    20     4    16    19     0   inf    0

In use 26114K, total allocated 27840K; utilization -56.9%

This is with a kernel from Jan 16 sources ...

--
Manuel Bouyer <bouyer@antioche.eu.org>
--