From: Peter Zijlstra <peterz@infradead.org>
To: Fabio Checconi <fchecconi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Paul Turner <pjt@google.com>,
Dario Faggioli <faggioli@gandalf.sssup.it>,
Michael Trimarchi <michael@evidence.eu.com>,
Dhaval Giani <dhaval@retis.sssup.it>,
Tommaso Cucinotta <t.cucinotta@sssup.it>,
linux-kernel@vger.kernel.org,
Fabio Checconi <fabio@gandalf.sssup.it>
Subject: Re: [PATCH 2/3] sched: enforce per-cpu utilization limits on runtime balancing
Date: Thu, 25 Feb 2010 21:28:23 +0100 [thread overview]
Message-ID: <1267129703.22519.559.camel@laptop> (raw)
In-Reply-To: <91b76b9b7555024d9afd7264eeae1b2db6a5e74c.1266931410.git.fabio@helm.retis>
On Tue, 2010-02-23 at 19:56 +0100, Fabio Checconi wrote:
> +#ifdef CONFIG_SMP
> +static inline unsigned long rt_init_free_bw(void)
> +{
> + unsigned long used = to_ratio(global_rt_period(), global_rt_runtime());
> +
> + return to_ratio(RUNTIME_INF, RUNTIME_INF) - used;
> +}
> +#endif
> +static void __rt_restart_balancing(void)
> +{
> + unsigned long used, global, free;
> + struct rq *rq;
> + int i;
> +
> + used = rt_used_bandwidth();
> + global = to_ratio(RUNTIME_INF, RUNTIME_INF);
> +
> + free = global - used;
We take the max as RUNTIME_INF instead of global_rt_* so that we can
move runtime around and fully saturate a single cpu (given there is
enough free to compensate on other cpus) ?
next prev parent reply other threads:[~2010-02-25 21:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-23 18:56 [PATCH 0/3] sched: use EDF to throttle RT task groups v2 Fabio Checconi
2010-02-23 18:56 ` [PATCH 1/3] sched: use EDF to schedule groups Fabio Checconi
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 16:59 ` Fabio Checconi
2010-02-23 18:56 ` [PATCH 2/3] sched: enforce per-cpu utilization limits on runtime balancing Fabio Checconi
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 16:59 ` Fabio Checconi
2010-02-25 20:28 ` Peter Zijlstra [this message]
2010-03-03 17:00 ` Fabio Checconi
2010-03-23 20:32 ` Peter Zijlstra
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 16:59 ` Fabio Checconi
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 17:00 ` Fabio Checconi
2010-03-23 20:33 ` Peter Zijlstra
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 17:00 ` Fabio Checconi
2010-02-23 18:56 ` [PATCH 3/3] sched: make runtime balancing code more EDF-friendly Fabio Checconi
2010-02-25 20:28 ` Peter Zijlstra
2010-03-03 17:01 ` Fabio Checconi
2010-02-25 20:28 ` [PATCH 0/3] sched: use EDF to throttle RT task groups v2 Peter Zijlstra
2010-02-27 12:33 ` Peter Zijlstra
2010-03-03 17:01 ` Fabio Checconi
2010-03-23 20:30 ` Peter Zijlstra
2010-03-23 20:56 ` Dhaval Giani
2010-03-23 21:51 ` Tommaso Cucinotta
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1267129703.22519.559.camel@laptop \
--to=peterz@infradead.org \
--cc=dhaval@retis.sssup.it \
--cc=fabio@gandalf.sssup.it \
--cc=faggioli@gandalf.sssup.it \
--cc=fchecconi@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=michael@evidence.eu.com \
--cc=mingo@elte.hu \
--cc=pjt@google.com \
--cc=t.cucinotta@sssup.it \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.