Fix/rt priority #83
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Fix/rt priority #83
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The jt-sample thread (throughput measurement) had priority 2 while jt-toptalk (packet processing) had priority 3. With SCHED_FIFO on the same CPU core, expensive packet processing work could preempt the 1ms sampling tick, causing gaps in throughput measurements. Raise jt-sample priority to 4 (highest) so the sampling thread can always preempt packet processing when needed. The 1ms tick has the strictest timing requirement and should never be delayed. New priority order: - jt-sample: 4 (highest) - 1ms tick must not be delayed - jt-toptalk: 3 - packet capture - jt-intervals: 2 - interval computation - jt-compute: 1 (lowest) - stats aggregation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
Add compile-time option RT_CPU_TOPTALK to pin packet capture threads (jt-toptalk, jt-intervals) to a different CPU core than the sampling thread (jt-sample). Default configuration: - RT_CPU=0: sampling thread on CPU 0 - RT_CPU_TOPTALK=1: packet capture threads on CPU 1 This provides complete isolation between the 1ms sampling tick and packet processing work, eliminating CPU contention on multi-core systems (which is all modern systems). For single-core systems (rare): make RT_CPU=0 RT_CPU_TOPTALK=0 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <[email protected]>
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