Research Article
Linux Low-Latency Tracing for Multicore Hard Real-Time Systems
Table 3
Statistics per loop, in nanoseconds, generated by npt on both standard and PREEMPT_RT patched kernels for both writer and timer versions of LTTng-UST.
| Kernel | Latencies in ns | Standard | PREEMPT_RT patched |
| LTTng-UST 2.2 | Writer | Timer | Writer | Timer |
| Minimum | 270.0 | 369.4 | 262.5 | 258.0 | Mean | 498.2 | 424.2 | 497.6 | 286.8 | Maximum | 82 180 | 7569 | 35 260 | 6409 |
| Variance | 3.620 | 1.063 | 4.872 | 0.4541 | std deviation | 60.17 | 32.60 | 69.80 | 21.31 |
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