Please help with following NUMA-related questions

2005-07-25 Thread Sheo Shanker Prasad
I will greatly appreciate any help regarding the following matters: (1) How to know whether my machine is NUMA-aware or not, (2) Difference between memory bank interleaving and node interleaving (3) When the BIOS asks me to set bank interleaving as AUTO, then it says that AUTO allows memory ac

/proc/mtrr & BIOS-provided RAM map

2005-07-09 Thread Sheo Shanker Prasad
I am having a horrible problem of wild and random variation in execution time of of a benchmark test program from one fresh reboot to another fresh reboot (and also from one try to another in any one reboot). At the advice of a few colleagues at linux-kernel@vger.kernel.org and at [EMAIL PROTEC

Re: Disturbing wide variation in execution time

2005-07-08 Thread Sheo Shanker Prasad
On Thursday July 7 2005 11:46 am, Philippe Troin wrote: > Sheo Shanker Prasad <[EMAIL PROTECTED]> writes: > > I will appreciate your help in eliminating a disturbing wide > > variation (by a factors of 2 to 2.5) in the execution time of a test > > (execution benchma

Re: Disturbing wide variation in execution time

2005-07-07 Thread Sheo Shanker Prasad
hope to hear from you soon. Regards. Sheo On Thursday July 7 2005 12:10 am, you wrote: > From: Sheo Shanker Prasad <[EMAIL PROTECTED]> > Date: Wed, 6 Jul 2005 23:44:53 -0700 > > > I will appreciate your help in eliminating a disturbing wide variation > > (by a

Disturbing wide variation in execution time

2005-07-06 Thread Sheo Shanker Prasad
I will appreciate your help in eliminating a disturbing wide variation (by a factors of 2 to 2.5) in the execution time of a test (execution benchmark) program under identical conditions even when the machine is freshly started (rebooted) and no other user program is running (not even e-mail or