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scx_lavd: incorporate a task's static priority in calculating its latency criticality

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That's because static (nice) priority is a strong hint to distinguish
latency-critical tasks.

Signed-off-by: Changwoo Min <changwoo@igalia.com>
This commit is contained in:
Changwoo Min 2024-07-28 15:40:25 +09:00
parent 221f1fe12a
commit 4449d8e31c
1 changed files with 9 additions and 1 deletions
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10
scheds/rust/scx_lavd/src/bpf/main.bpf.c
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@ -1079,7 +1079,15 @@ static void calc_lat_cri(struct task_struct *p, struct task_ctx *taskc)
* a boost priority. We add +1 to guarantee the latency criticality
* (log2-ed) is always positive.
*/
taskc->lat_cri = log2_u64(lat_cri_raw + 1);
lat_cri = log2_u64(lat_cri_raw + 1);
/*
* A user-provided nice value is a strong hint for latency-criticality.
*/
lat_cri += calc_static_prio_factor(p);
lat_cri = max(lat_cri, 1);
taskc->lat_cri = lat_cri;
}
static void calc_starv_cri(struct task_ctx *taskc, bool is_wakeup)