Re: Thread pool efficiency

[Brad Knowles <b.knowles@its.utexas.edu>]

Howard Chu wrote:

> Testing on an 8-socket AMD server with Opteron 885 dual-core processors 
> (16 cores total) and a Sun T5120 (T2 Niagara 8 cores, 64 hardware 
> threads) has shown that our current frontend code is performing very 
> poorly with more than 16 server threads.

You mention one particular hardware architecture here.  Looking through 
the rest of your performance tuning slides that I know of, I'm not 
seeing a lot of this kind of work done on other architectures.  Is this 
possibly an AMD or Intel limitation?  Or maybe there are OS-specific issues?

I only ask because right now our big OpenLDAP servers are on Sun SPARC 
processors (UltraSPARC-IIIi?) running Solaris 9, and I'm wondering if 
the problems we've had in the past might be related to our particular 
hardware/OS choices, as compared to the ones you've been testing with.


Just curious.  Thanks!

--
Brad Knowles <b.knowles@its.utexas.edu>
Senior System Administrator, UT Austin ITS-Unix
COM 24  |  5-9342