Advances in Computer Engineering / 2015 / Article / Tab 2

Research Article

Linux Low-Latency Tracing for Multicore Hard Real-Time Systems

Table 2

Statistics per loop, in nanoseconds, generated by npt for loops on both standard and PREEMPT_RT patched kernels for both LTTng-UST 2.2 and SystemTap 2.2.1.

KernelLatencies in ns
Standard PREEMPT_RT patched

Tracer LTTngSystemTap LTTng SystemTap

Minimum 270.0581.6262.5911.2
Mean 498.2777.0497.61028
Maximum 82 1801 498 00035 2601 476 000

Variance 3.62023.364.87233.74
std deviation 60.17152.869.80183.7

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