[SCore-users] (no subject)

[Daniel Charpin]

 Dear list members,

 It is very useful for HPC benchmarks to measure some performance 
characteristics of programs. There is a nice tool named "lperfex" which is a 
hardware performance monitor for linux/IA32 systems described at:

http://www.osc.edu/~troy/lperfex/

Example of measurements:

dcharpin {1021}->  lperfex -y -e 41 -e P6_MUL ./a.out
 1  2.5
 2  1.25
 3  0.78125
./a.out:   1.12s CPU,  1.11s wallclock
(100.90% CPU utilization) on essf (2x Intel Pentium III 501.1 MHz)

TSC                            558257627
PMC[0] (P6_FLOPS)               17430090
PMC[1] (P6_MUL)         27900665

Statistics (averaged across threads):
---------------------------------------
MFLOPS                       15.702784
FP multiplications/total FP ops       1.600718

Before to install this tool, it is necessary to install the patch 
"perfctr-2.4.3" in the kernel.

Please, could you investigate the possibility to install it in the next Score 
release ?

Thank you for your support.
Best regards,

Daniel Charpin
NEC / European Supercomputer Systems
"Le Saturne" - 3, Parc Ariane - 78284 GUYANCOURT Cedex
+33 (0)1 39 30 66 05 | +33 (0)6 03 20 07 21
Courriel: Daniel.Charpin at nec.fr
< http://www.ess.nec.de >