Re: JVM performance on Linux (vs. Solaris/Windows)

["Jeff V. Merkey" <jmerkey@wolfmountaingroup.com>]

David Lang wrote:

> On Thu, 13 Apr 2006, Jeff V. Merkey wrote:
>
>> Note they ran the benchmark on an Opteron 285 instead of a Xeon with 
>> 16 GB of memory. Opteron peformance currently **SUCKS** with 2.6 
>> series kernels under any kind of heavy I/O due to their cloning of 
>> the ancient 82489DX architecture for I/O interrupt access and 
>> performance. Looks like the test was stakced against Linux from the 
>> start. Should have used a Xeon system. AMD needs to get their crappy 
>> I/O performance up to snuff. Looking at the test parameteres leads me 
>> to believe there was a lot of swapping on a system with already poor 
>> I/O performance.
>
>
> Jeff, I've seen several reccomendations from databasefolks (postgres 
> and mysql) favoring Opterons over Xeons. this doesn't match your 
> statement that Opteron performance sucks under any kind of I/O load. I 
> don't understand how both can be correct.
>
> David Lang
>
Hi David,

I have tested our Solera products on both Xeon and Opteron Processors. I 
can sustain 500 MB/S capture off the wire on 4 x 1000 Gigabit segments
due to the incredible performance of Xeon based I/O chipsets. My tests 
with Opteron based systems are sick in comparison. An Opteron 200 series 
CPU on a Tyan based motherbord system is discouraging on comparison. The 
Opteron systems will only sustain 150 MB/S with the same software.

The I/O chipset performance for disk and LAN I/O is purtrid compared to 
the 7500 series I/O chipsets.

Jeff