I am trying to check out the SMP stability of the development and stable
kernels. I would like to answer the question: "Can I put an enterprise database
on a SMP Linux machine?" I try to get an answer simulating a reasonable
CPU+DISK+MEMORY load by running kernel compile (minimal configuration,
building zImage only) 100 times in a row. No crazy `make -j', nor even a
moderate `make -j 4' (yet!), I am doing a simple make zImage:
-----------------------------------
#!/bin/sh
for i in 0 1 2 3 4 5 6 7 8 9
do
for j in 0 1 2 3 4 5 6 7 8 9
do
make dep;make clean
make zImage >log.$i.$j 2>&1
done
done
------------------------------------
Mind it, the load never goes beyond 2 and it is below 1.5 most of the time.
Once this test succeeds (machine does not lock up) I would like to run
parallel `make -j 4' 100 times in a row. The probelem is that it does not
succed now. Currently, I get the following:
under 2.125/2.126 SMP:
machine locks up after compiling 75-80 series. Sometime messages about being
unable to free memory appear on the console.
under 2.0.36-pre-laest SMP: kernel oopses after compiling 10+ series.
under 2.0.36-pre-latest UP: no problem whatsover compiling 100 series.
The problem is not likely to be hardware related as far as CPUs or memory are
concerned. (The test on UP kernel secceeds, no messages "internal compiler
error... signal 11" appear). My setup is:
Dual Supermicro P6DGU 440GX
Dual PII 333 MHZ (no overclocking) with Deschutes core
Onboard Adaptec 7890 Ultra II+
SCSI Ultra II+ Quantum Atlas II QM39100AL-SCA 9.1GB, 7200RPM, 8ms, 1M cache.
256 MB PC100 RAM.
I do not know what the problem is. I am going to investigate further, possibly
contact the kernel guys.
On 02-Nov-98 Oliver Stahlhut wrote:
> Robert M. Hyatt wrote:
>>
>> 2.1.125 has been running at least a week on my machine, no crashes,
>> hangs or anything. But then I haven't had a bad 2.1 since the early
>> 2.1.90's in fact...
>>
>> reminds me of the Chevy truck commercials, "like a rock..."
>>
>> :)
>>
>> running this kernel in production on a couple of file servers
>> too... no hiccups.
>>
>> Robert Hyatt Computer and Information Sciences
>> [EMAIL PROTECTED] University of Alabama at Birmingham
>> (205) 934-2213 115A Campbell Hall, UAB Station
>> (205) 934-5473 FAX Birmingham, AL 35294-1170
>>
>> On Wed, 21 Oct 1998, Gavin M. Roy wrote:
>
> Hi Robert!
>
> You wrote that you are running 2.1.x (x=125) on file servers in
> production. Could you please tell me which version of NFS-Server you are
> using ? ... We have about 20 double-processor machines here in our
> institute which work as number crunchers and also as NFS-servers ... i
> have to restart the NFSD regulary because of lockups of the daemon
> process (UNFSD - not the new kernel version). The KNFSD doesn't work
> together with SGI & SUN that's why we have to stick to the UNFSD.
>
> Thanx
> Oliver
> --
> /*
> Oliver Stahlhut - Universitaet Hannover
> Institut f�r Theoretische Nachrichtentechnik
> und Informationsverarbeitung (TNT)
>
> mailto:[EMAIL PROTECTED]
> http://www.tnt.uni-hannover.de/~stahlhut/
> */
----------------------------------
Constantine Gavrilov
Unix System Administration
MIS, Indigo Ltd.
Tel. 08-9381058
E-Mail: [EMAIL PROTECTED]
Date: 02-Nov-98
Time: 16:49:05
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----------------------------------
