Paul Hinker's Weblog

Parallel Dual-Core Amd Performance

Last time I presented some serial performance for a dual-core Amd box (285 cpus) . Those numbers aren't especially interesting so here are some parallel perform ance numbers.

Matrix Size	1Cpu	2Cpu	4Cpu	% of Peak	2Cpu Scaling	4Cpu Scaling
1000	4605	9076.68	17614.13	88.56%	98.55%	95.63%
1250	4661.55	9162.21	17764.15	89.65%	98.27%	95.27%
1500	4632.85	9128.44	17840.91	89.09%	98.52%	96.27%
1750	4647.37	9132.16	17990.68	89.37%	98.25%	96.78%
2000	4624.1	9149.64	18010.68	88.93%	98.93%	97.37%
2250	4642.03	9185.79	18015.37	89.27%	98.94%	97.02%
2500	4630.41	9148.34	18015.57	89.05%	98.79%	97.27%
2750	4641.52	9191.52	18006.34	89.26%	99.01%	96.99%
3000	4607.91	9120.19	17946.34	88.61%	98.96%	97.37%
3250	4646.25	9203.86	18112.48	89.35%	99.05%	97.46%
3500	4621.16	9169.04	17988.65	88.87%	99.21%	97.32%
3750	4628.75	9166.81	17995.61	89.01%	99.02%	97.19%
4000	4673.16	9277.18	18291.52	89.87%	99.26%	97.85%
4250	4628.35	9175.68	18077.82	89.01%	99.12%	97.65%
4500	4611.75	9135.38	18009.88	88.69%	99.04%	97.63%
4750	4634.89	9195.68	18090.37	89.13%	99.20%	97.58%
5000	4600.08	9103.6	18054.83	88.46%	98.95%	98.12%

Performance numbers are expressed in Mflops and scaling is calculated as (multi-core performance / (serial performance * #cpus used)

Nice performance numbers with 90% of peak for the serial run and as much as 98% scaling to 4 cpus. The above table concerns the double precision matrix multiply routine. As discussed previously in this blog, the DGEMM routine is probably one of the most heavily used routines in high performance computing. Especially when solving dense systems. The 3 other 'flavors' of matrix multiply (single,complex, double complex) demonstrate similar performance and scaling.

Posted at 11:09AM Jan 19, 2006 by hinkthink in General  |