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| author | Josh Don <joshdon@google.com> | 2023-06-20 11:32:47 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-07-13 15:21:49 +0200 |
| commit | 677ea015f231aa38b3972aa7be54ecd2637e99fd (patch) | |
| tree | 48661764d6c5be468c73ef442d64e877d318fd23 /kernel/cgroup | |
| parent | 79462e8c879afc7895b30014d31e2c1fd629bb1f (diff) | |
| download | linux-677ea015f231aa38b3972aa7be54ecd2637e99fd.tar.gz linux-677ea015f231aa38b3972aa7be54ecd2637e99fd.tar.bz2 linux-677ea015f231aa38b3972aa7be54ecd2637e99fd.zip | |
sched: add throttled time stat for throttled children
We currently export the total throttled time for cgroups that are given
a bandwidth limit. This patch extends this accounting to also account
the total time that each children cgroup has been throttled.
This is useful to understand the degree to which children have been
affected by the throttling control. Children which are not runnable
during the entire throttled period, for example, will not show any
self-throttling time during this period.
Expose this in a new interface, 'cpu.stat.local', which is similar to
how non-hierarchical events are accounted in 'memory.events.local'.
Signed-off-by: Josh Don <joshdon@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230620183247.737942-2-joshdon@google.com
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index bfe3cd8ccf36..4e3ee13217ce 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -3685,6 +3685,36 @@ static int cpu_stat_show(struct seq_file *seq, void *v) return ret; } +static int __maybe_unused cgroup_local_stat_show(struct seq_file *seq, + struct cgroup *cgrp, int ssid) +{ + struct cgroup_subsys *ss = cgroup_subsys[ssid]; + struct cgroup_subsys_state *css; + int ret; + + if (!ss->css_local_stat_show) + return 0; + + css = cgroup_tryget_css(cgrp, ss); + if (!css) + return 0; + + ret = ss->css_local_stat_show(seq, css); + css_put(css); + return ret; +} + +static int cpu_local_stat_show(struct seq_file *seq, void *v) +{ + struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup; + int ret = 0; + +#ifdef CONFIG_CGROUP_SCHED + ret = cgroup_local_stat_show(seq, cgrp, cpu_cgrp_id); +#endif + return ret; +} + #ifdef CONFIG_PSI static int cgroup_io_pressure_show(struct seq_file *seq, void *v) { @@ -5235,6 +5265,10 @@ static struct cftype cgroup_base_files[] = { .name = "cpu.stat", .seq_show = cpu_stat_show, }, + { + .name = "cpu.stat.local", + .seq_show = cpu_local_stat_show, + }, { } /* terminate */ }; |