linux-kernel - Re: Sending some form of notifaction when sched

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 28 Dec 2010 11:30:10 +0100
From:	Dario Faggioli <raistlin@...ux.it>
To:	Bharata B Rao <bharata.rao@...il.com>
Cc:	torbenh <torbenh@....de>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Gregory Haskins <ghaskins@...ell.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Dhaval Giani <dhaval.giani@...il.com>
Subject: Re: Sending some form of notifaction when sched_fifo throttling
 kicks in...

On Mon, 2010-12-27 at 12:13 +0530, Bharata B Rao wrote: 
> > Do others have some idea and/or comments about that? This is
> > ABI/interface, and that really scares me! :-P
> 
> You might want to note that CFS bandwidth control patches export some
> such stats via a new per-cgroup file cpu.stat. It exports 3 statistics:
> 
Yeah, I saw that. What can be also done is to extend schedstats and then
apply it to cgroups as well... I think Dhaval told me he has some plans
about that, am I wrong?

> nr_periods: Number of enforcement intervals that have elapsed.
> nr_throttled: Number of times the group has been throttled/limited.
> throttled_time: The total time duration (in nanoseconds) for which the group
> remained throttled.
> 
More than reasonable reporting, to me at least. :-)

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa  (Italy)

http://retis.sssup.it/people/faggioli -- dario.faggioli@...ber.org

Download attachment "signature.asc" of type "application/pgp-signature" (199 bytes)