scx_lavd: misc performance tuning #822
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added 3 commits
October 21, 2024 15:56
Giving more penalties to a long-running tasks helps to segregate latency-critical tasks, which are usually short-running, to long-running tasks, which are compute-intensive. Signed-off-by: Changwoo Min <[email protected]>
When there is an idle CPU, direct dispatch is performed to reduce scheduling latency. This didn't work well before, but it seems to work well now with other tunings. Signed-off-by: Changwoo Min <[email protected]>
When a task holds a lock, refill its time slice once at the ops.dispatch() path to avoid the lock holder preemption problem. Signed-off-by: Changwoo Min <[email protected]>
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This definitely shows an improvement on my system compared to |
htejun
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Oct 21, 2024
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This PR contains the following two performance tunings:
With these two commits, now
scx_lavdshow more stable performance onosu!with heavy background workloads.