LTTng CLUST: A System-Wide Unified CPU and GPU Tracing Tool for OpenCL Applications

Table 2

Synchronous OpenCL API function overhead benchmark.

Loop; Size	Base; ave.; (ns/call)	Base; Std. dev.; (ns/call)	Preload; ave.; (ns/call)	Preload; Std. dev.; (ns/call)	Trace; ave.; (ns/call)	Trace; Std. dev.; (ns/call)	Preload; overhead; (ns/call)	Trace; overhead; (ns/call)
1	16	3	18	3	383	8	2	367
10	5.2	0.5	7.8	0.6	366.5	2.2	2.6	361.3
	4.64	0.04	6.66	0.05	365.68	6.38	2.02	361.04
	4.291	0.006	6.058	0.028	365.168	2.88	1.767	360.877
	4.277	0.012	6.283	0.036	359.780	13.425	2.006	355.503
	4.526	0.005	6.484	0.101	359.379	1.055	1.958	354.853
	4.531	0.029	6.467	0.097	363.313	5.138	1.936	358.782
	4.537	0.018	6.499	0.150	361.145	2.791	1.962	356.608
	4.535	0.022	6.460	0.026	361.108	1.966	1.925	356.573

Sample size = 100.