A Heterogeneous System Based on Latent Semantic Analysis Using GPU and Multi-CPU

Table 5

Results of execution time in a truncated SVD procedure applied in the hLSA system using GPU-accelerated procedures and the LSA system using CPU sequential-only procedures for 2000 documents.

Number of	hLSA				LSA
	Matrix S; (ms)	Matrix D; (ms)	Matrix T; (ms)	Total; (ms)	Matrix S; (ms)	Matrix D; (ms)	Matrix T; (ms)	Total; (ms)
25	0.158	7.241	59.635	67.033	0.094	11.151	254.472	265.717
50	0.134	6.540	59.228	65.902	0.113	12.756	251.627	264.496
75	0.144	6.870	59.576	66.590	0.127	10.842	250.042	261.011
100	0.149	4.216	60.443	64.808	0.118	10.594	251.530	262.242
125	0.118	5.064	60.644	65.826	0.115	11.048	262.973	274.136
150	0.176	4.657	61.183	66.016	0.127	10.387	261.292	271.806
175	0.113	6.631	61.259	68.002	0.120	10.626	257.150	267.896
200	0.162	4.195	62.297	66.653	0.135	10.148	265.645	275.928
225	0.174	4.204	63.519	67.897	0.140	10.298	266.845	277.283
250	0.177	4.941	63.100	68.219	0.142	10.090	256.517	266.749
275	0.177	4.599	65.915	70.691	0.140	10.917	257.991	269.048
300	0.174	4.829	64.671	69.675	0.147	10.869	269.890	280.906
325	0.174	6.413	64.655	71.242	0.150	10.774	254.650	265.574
350	0.178	4.269	67.372	71.818	0.149	10.570	253.184	263.903
375	0.157	4.843	68.000	72.999	0.194	10.630	252.340	263.164
400	0.209	5.808	66.520	72.537	0.181	10.776	252.570	263.527
425	0.209	6.443	66.587	73.239	0.174	12.384	265.330	277.888
450	0.243	5.847	69.124	75.213	0.162	10.868	258.973	270.003
475	0.198	4.866	70.410	75.474	0.169	10.796	265.007	275.972
500	0.201	5.765	70.373	76.338	0.172	10.656	256.289	267.117