Gino Ruopolo wrote:
Also other sysadmin I know found the same when
switched from Sparc to Opteron...
Then you know the wrong sysadmins.
:|
Simple test: Compile some files in parallel (dmake -j
X) on a 2 cpu box:
(1) dmake -j 2
real 1:18.18
user 1:37.05
sys 18.57
Load average: 1.32
dmake -j 8
real 1:12.24
user 1:37.65
sys 18.42
Load average: 4.32
dmake -j 64
real 1:14.06
user 1:37.90
sys 18.49
Load average: 11.86
me system time
. only a slight increase in user time from -j 8 to -j
64
I'm not talking about 32-64 copy of the same process.
100 process is nothing!
I was referring about having 10.000 - 40.000 process runnning
for a total of 60-90 GB RAM
My ---initial testing--- between a 4x880 Opteron and SF4800 12x USIII
1200 Mhz are showing lower load on the SF4800 when more than 10.000 process running.
Anyway doing benchmark is not easy :)
Load average isn't interesting. What is interesting is throughput...
Now, I can well believe that 12 CPUs w/ 8M caches handle
10K processes more gracefully than 4 CPUS w/ 1M caches...
What were you expecting to happen?
- Bart
--
Bart Smaalders Solaris Kernel Performance
[EMAIL PROTECTED] http://blogs.sun.com/barts
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