From: Juri Lelli <juri.lelli@arm.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Juri Lelli <juri.lelli@gmail.com>,
Clark Williams <williams@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 3/4] sched: Add bandwidth ratio to /proc/sched_debug
Date: Tue, 23 Feb 2016 09:55:42 +0000 [thread overview]
Message-ID: <20160223095542.GH27380@e106622-lin> (raw)
In-Reply-To: <20160222212825.756849091@goodmis.org>
Hi Steve,
On 22/02/16 16:26, Steven Rostedt wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
>
> Playing with SCHED_DEADLINE and cpusets, I found that I was unable to create
> new SCHED_DEADLINE tasks, with the error of EBUSY as if the bandwidth was
> already used up. I then realized there wa no way to see what bandwidth is
> used by the runqueues to debug the issue.
>
> By adding the dl_bw->bw and dl_bw->total_bw to the output of the deadline
> info in /proc/sched_debug, this allows us to see what bandwidth has been
> reserved and where a problem may exist.
>
[...]
>
> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This is pretty useful yes.
FWIW,
Acked-by: Juri Lelli <juri.lelli@arm.com>
Best,
- Juri
next prev parent reply other threads:[~2016-02-23 9:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-22 21:26 [PATCH 0/4] sched: Display deadline bandwidth and other SCHED_DEBUG clean up Steven Rostedt
2016-02-22 21:26 ` [PATCH 1/4] sched: Move sched_feature file setup into debug.c Steven Rostedt
2016-02-29 11:16 ` [tip:sched/core] sched/debug: Move the /sys/kernel/debug/sched_features " tip-bot for Steven Rostedt (Red Hat)
2016-02-22 21:26 ` [PATCH 2/4] sched: Move sched_domain_sysctl to debug.c Steven Rostedt
2016-02-29 11:16 ` [tip:sched/core] sched/debug: " tip-bot for Steven Rostedt (Red Hat)
2016-02-22 21:26 ` [PATCH 3/4] sched: Add bandwidth ratio to /proc/sched_debug Steven Rostedt
2016-02-23 9:55 ` Juri Lelli [this message]
2016-02-29 11:16 ` [tip:sched/core] sched/debug: Add deadline scheduler " tip-bot for Steven Rostedt (Red Hat)
2016-02-22 21:26 ` [PATCH 4/4] tracing: Add __print_ns_to_secs() and __print_ns_without_secs() helpers Steven Rostedt
2016-02-23 12:49 ` Peter Zijlstra
2016-02-23 13:17 ` Steven Rostedt
2016-02-23 14:01 ` Peter Zijlstra
2016-02-23 14:30 ` Steven Rostedt
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