From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Bristot de Oliveira <bristot@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Juri Lelli <juri.lelli@arm.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: [PATCH V2 3/3] sched/deadline: Tracepoints for deadline scheduler
Date: Tue, 29 Mar 2016 18:04:01 +0200 [thread overview]
Message-ID: <20160329160401.GB3430@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20160329115700.40acb336@gandalf.local.home>
On Tue, Mar 29, 2016 at 11:57:00AM -0400, Steven Rostedt wrote:
> Hmm, I probably could add tracing infrastructure that would let us
> extend existing tracepoints. That is, without modifying sched_switch,
> we could add a new tracepoint that when enabled, would attach itself to
> the sched_switch tracepoint and record different information. Like a
> special sched_switch_deadline tracepoint, that would record the existing
> runtime,deadline and period for deadline tasks. It wont add more
> tracepoints into the core scheduler, but use the existing one.
Urgh; maybe. But I would would not want the new thing to be called
_deadline, maybe _v{n} id anything and have a KERN_WARNING emitted when
people enable the old one.
Ideally we'd rename the old one, but I suspect even that would break
stuff :/
next prev parent reply other threads:[~2016-03-29 16:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-28 16:50 [PATCH V2 0/3] Tracepoints for deadline scheduler Daniel Bristot de Oliveira
2016-03-28 16:50 ` [PATCH V2 1/3] tracing: Add __print_ns_to_secs() and __print_ns_without_secs() helpers Daniel Bristot de Oliveira
2016-03-28 16:50 ` [PATCH V2 2/3] sched: Move deadline container_of() helper functions into sched.h Daniel Bristot de Oliveira
2016-03-28 16:50 ` [PATCH V2 3/3] sched/deadline: Tracepoints for deadline scheduler Daniel Bristot de Oliveira
2016-03-29 15:16 ` Peter Zijlstra
2016-03-29 15:57 ` Steven Rostedt
2016-03-29 16:04 ` Peter Zijlstra [this message]
2016-03-29 17:10 ` Steven Rostedt
2016-03-29 20:11 ` Peter Zijlstra
2016-03-29 20:29 ` Steven Rostedt
2016-03-29 20:46 ` Peter Zijlstra
2016-03-29 20:57 ` Daniel Bristot de Oliveira
2016-03-29 21:03 ` Peter Zijlstra
2016-03-29 21:49 ` Steven Rostedt
2016-03-29 17:37 ` Daniel Bristot de Oliveira
2016-03-29 18:10 ` Steven Rostedt
2016-03-29 16:10 ` Daniel Bristot de Oliveira
2016-03-29 17:13 ` Steven Rostedt
2016-03-29 19:12 ` Daniel Bristot de Oliveira
2016-03-29 19:25 ` Steven Rostedt
2016-03-31 5:19 ` Juri Lelli
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