scaling NAMD2.6B1 on IBM P5

From: Thomas C. Bishop (bishop_at_tulane.edu)
Date: Tue Apr 25 2006 - 14:44:33 CDT

Suggestions on improving the scaling for a system w/
~~ 100,000 atoms on an IBM P5 system???

Setting MP_EAGER_LIMIT 65536
as per Joachim Hein suggests at
http://www.ks.uiuc.edu/Research/namd/wiki/index.cgi?NamdOnAIX

helps... but our numbers are all still all over the place.
see below

Config. file is attached.

Thanks in advance
TOm
******************* COMPLETE BENCHMARKS with DEFAULT ENV. *********
P32/P32.out:Info: Benchmark time: 32 CPUs 0.303442 s/step 1.75603 days/ns 124859 kB memory
P32/P32.out:Info: Benchmark time: 32 CPUs 0.374714 s/step 2.16848 days/ns 124859 kB memory
P40/P40.out:Info: Benchmark time: 40 CPUs 0.619932 s/step 3.58757 days/ns 121786 kB memory
P40/P40.out:Info: Benchmark time: 40 CPUs 0.484935 s/step 2.80633 days/ns 121786 kB memory
P48/P48.out:Info: Benchmark time: 48 CPUs 0.694281 s/step 4.01783 days/ns 123195 kB memory
P48/P48.out:Info: Benchmark time: 48 CPUs 0.86232 s/step 4.99028 days/ns 127035 kB memory
P56/P56.out:Info: Benchmark time: 56 CPUs 0.563763 s/step 3.26251 days/ns 121018 kB memory
P56/P56.out:Info: Benchmark time: 56 CPUs 0.456623 s/step 2.64249 days/ns 121018 kB memory
P64.noEnv/P64.out:Info: Benchmark time: 64 CPUs 1.13857 s/step 6.58896 days/ns 121403 kB memory
P64.noEnv/P64.out:Info: Benchmark time: 64 CPUs 1.05843 s/step 6.12518 days/ns 121403 kB memory
P64/P64.out:Info: Benchmark time: 64 CPUs 0.879487 s/step 5.08962 days/ns 121339 kB memory
P64/P64.out:Info: Benchmark time: 64 CPUs 0.569747 s/step 3.29715 days/ns 121339 kB memory
P72/P72.out:Info: Benchmark time: 72 CPUs 0.535661 s/step 3.09989 days/ns 134077 kB memory
P72/P72.out:Info: Benchmark time: 72 CPUs 0.69801 s/step 4.03941 days/ns 134077 kB memory
P80/P80.out:Info: Benchmark time: 80 CPUs 0.900915 s/step 5.21363 days/ns 125371 kB memory
P80/P80.out:Info: Benchmark time: 80 CPUs 0.634542 s/step 3.67212 days/ns 125371 kB memory

    

---
**********************
Thomas C. Bishop     *
Office: 504-988-6203 *
Cell:   504-940-8996 *
Fax:    504-988-1726 *
**********************
-- 
**********************
Thomas C. Bishop     *
Office: 504-988-6203 *
Cell:   504-940-8996 *
Fax:    504-988-1726 *
**********************

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