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Merge pull request #868 from hodgesds/layered-cost-dump

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scx_layered: Add layer CPU cost to dump
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Daniel Hodges 2024-10-31 14:57:35 -04:00 committed by GitHub
commit 9a47677904
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1 changed files with 39 additions and 0 deletions
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39
scheds/rust/scx_layered/src/bpf/main.bpf.c
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@ -2078,6 +2078,43 @@ static void dump_layer_cpumask(int idx)
scx_bpf_dump("%s", buf);
}
int dump_cost(void)
{
int i, j;
struct cost *costc;
struct layer *layer;
// Lookup global cost
if (!(costc = lookup_cost(0))) {
scx_bpf_error("unabled to lookup cost ");
return -EINVAL;
}
bpf_for(j, 0, nr_layers) {
layer = lookup_layer(j);
if (!layer) {
scx_bpf_error("unabled to lookup layer %d", j);
continue;
}
scx_bpf_dump("GLOBAL[%d][%s] budget=%lld capacity=%lld\n",
j, layer->name,
costc->budget[j], costc->capacity[j]);
}
// Per CPU costs
bpf_for(i, 0, nr_possible_cpus) {
bpf_for(j, 0, nr_layers) {
layer = lookup_layer(i);
if (!layer || !(costc = lookup_cpu_cost(j))) {
scx_bpf_error("unabled to lookup layer %d", i);
continue;
}
scx_bpf_dump("CPU[%d][%s][%d] budget=%lld capacity=%lld\n",
i, j, layer->name,
costc->budget[j], costc->capacity[j]);
}
}
return 0;
}
void BPF_STRUCT_OPS(layered_dump, struct scx_dump_ctx *dctx)
{
u64 now = bpf_ktime_get_ns();
@ -2122,6 +2159,8 @@ void BPF_STRUCT_OPS(layered_dump, struct scx_dump_ctx *dctx)
scx_bpf_dump("LO_FALLBACK nr_queued=%d -%llums\n",
scx_bpf_dsq_nr_queued(LO_FALLBACK_DSQ),
dsq_first_runnable_for_ms(LO_FALLBACK_DSQ, now));
dump_cost();
}