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@@ -250,10 +250,12 @@ breadcrumbs:
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- Monitor interrupts:
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- `irqtop`
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- `watch -n0.1 /proc/interrupts`
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-- Run command with high or low priority:
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+- Run command with high or low CPU priority:
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- Command: `nice -n<n> <cmd>` (`-20 <= n <= 19`)
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- The nice value goes from -20 (highest priority) to 19 (lowest priority), with 0 as the default priority.
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- The nice value is inherited by child processes (meaning forking processes maintains the nice value it started with).
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+ - Use `renice` to change the value.
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+ - Use `ionice` to set the I/O scheduler and scheduler-specific priority.
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- Stress test with stress-ng:
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- Install (Debian): `apt install stress-ng`
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- Stress CPU: `stress-ng -c $(nproc) -t $((10*60))` (use all CPU threads for 10 minutes)
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Nordstrand