tag

#perf

3 posts

LinuxDeep Dive October 4, 2026 7 min read

Linux perf c2c: Find Cache-Line Contention Before Blaming the Lock

Use Linux perf c2c to locate cache-to-cache traffic, validate false-sharing hypotheses, and separate hardware sampling limits from application contention.

#linux#perf#performance

LinuxDeep Dive October 4, 2026 6 min read

Linux perf sched timehist: Measuring Wakeup-to-Run Delay

Use perf sched traces to separate runnable queue delay from execution time, inspect scheduler latency, and build bounded, reproducible workload evidence.

#linux#perf#scheduler

LinuxDeep Dive October 3, 2026 7 min read

Linux perf Event Counting: PMUs, Multiplexing, and Measurement Error

Measure Linux hardware and software events with perf while accounting for PMU scope, counter multiplexing, lost samples, permissions, and noise.

#linux#perf#pmu