linux-kernel - Re: [RFC] Introduce greedy hrtimer walk on idle

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

Message-ID: <1317216315.24040.20.camel@twins>
Date:	Wed, 28 Sep 2011 15:25:15 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Venki Pallipadi <venki@...gle.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] Introduce greedy hrtimer walk on idle

On Fri, 2011-09-23 at 16:41 -0700, Venki Pallipadi wrote:
> On Fri, Sep 23, 2011 at 12:55 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> > On Fri, 2011-09-23 at 11:54 -0700, Venkatesh Pallipadi wrote:
> >> Comments?
> >
> > One of the reasons we didn't do it before was added cost to
> > hrtimer_{add,del}, did you measure workloads that are heavy on  that?
> >
> 
> I haven't seen any measurable overhead with workloads I have tried.
> But, I don't think I have hit that path hard enough. Do you have any
> particular workload in mind?

Not really, I asked tglx if he knew a particular workload to test this,
but he didn't have anything either.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/