linux-kernel - Re: [RFC PATCH 14/17] sched: Add deadline tracepoints

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Message-ID: <aLcFWBGfeET6_KuO@jlelli-thinkpadt14gen4.remote.csb>
Date: Tue, 2 Sep 2025 16:55:20 +0200
From: Juri Lelli <juri.lelli@...hat.com>
To: Gabriele Monaco <gmonaco@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Ingo Molnar <mingo@...hat.com>, linux-trace-kernel@...r.kernel.org,
	Nam Cao <namcao@...utronix.de>, Tomas Glozar <tglozar@...hat.com>,
	Juri Lelli <jlelli@...hat.com>,
	Clark Williams <williams@...hat.com>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [RFC PATCH 14/17] sched: Add deadline tracepoints

On 19/08/25 16:02, Juri Lelli wrote:
> On 19/08/25 12:34, Gabriele Monaco wrote:

...

> > > As per the whole _tp() thing, you can attach to the actual
> > > sched_switch tracepoint with a module and read whatever you want.
> > 
> > Yeah I believe Juri referred to model constraints on the already
> > existing events rather than new tracepoints here.
> 
> Separately from this series, maybe we should put such a module/bpf thing
> somewhere shared, so it's easier to use it when needed.

Maybe we could

---
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 383cfc684e8e..994b6973d77d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -117,6 +117,10 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_cfs_tp);
 EXPORT_TRACEPOINT_SYMBOL_GPL(sched_util_est_se_tp);
 EXPORT_TRACEPOINT_SYMBOL_GPL(sched_update_nr_running_tp);
 EXPORT_TRACEPOINT_SYMBOL_GPL(sched_compute_energy_tp);
+EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_throttle_tp);
+EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_replenish_tp);
+EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_server_start_tp);
+EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_server_stop_tp);
 
 DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
---

so that the new tps can be used from modules like sched_tp Phil
mentioned?

Thanks,
Juri