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sched_ext: Include task weight in the error state dump

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Report the task weight when dumping the task state during an error exit.
Moreover, adjust the output format to display dsq_vtime, slice, and
weight on the same line.

This can help identify whether certain tasks were excessively
prioritized or de-prioritized due to large niceness gaps.

Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Andrea Righi 2025-01-22 10:05:25 +01:00 • committed by Tejun Heo
parent be8ee18152
commit 2279563e3a
1 changed files with 4 additions and 3 deletions
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7
kernel/sched/ext.c
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@ -5277,9 +5277,10 @@ static void scx_dump_task(struct seq_buf *s, struct scx_dump_ctx *dctx,
scx_get_task_state(p), p->scx.flags & ~SCX_TASK_STATE_MASK,
p->scx.dsq_flags, ops_state & SCX_OPSS_STATE_MASK,
ops_state >> SCX_OPSS_QSEQ_SHIFT);
dump_line(s, " sticky/holding_cpu=%d/%d dsq_id=%s dsq_vtime=%llu slice=%llu",
p->scx.sticky_cpu, p->scx.holding_cpu, dsq_id_buf,
p->scx.dsq_vtime, p->scx.slice);
dump_line(s, " sticky/holding_cpu=%d/%d dsq_id=%s",
p->scx.sticky_cpu, p->scx.holding_cpu, dsq_id_buf);
dump_line(s, " dsq_vtime=%llu slice=%llu weight=%u",
p->scx.dsq_vtime, p->scx.slice, p->scx.weight);
dump_line(s, " cpus=%*pb", cpumask_pr_args(p->cpus_ptr));
if (SCX_HAS_OP(dump_task)) {