linux-kernel - Re: PROBLEM: high load average when 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 for Android: free password hash cracker in your pocket

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

Message-ID: <4703DF80.5010405@linux.intel.com>
Date:	Wed, 03 Oct 2007 11:29:20 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Chuck Ebbert <cebbert@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Anders Bostr?m <anders@...trom.dyndns.org>,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: high load average when idle

Linus Torvalds wrote:
> 
> On Wed, 3 Oct 2007, Arjan van de Ven wrote:
>> not sure this is going to help; I mean, the load gets only updated in actual
>> timer interrupts... and on a tickless system there's very few of those
>> around..... and usually at places round_jiffies() already put a timer on.
> 
> Yeah, you're right. Although in practice, at least on a system running 
> X, I'd expect that there still is lots of other timers going on, hiding 
> the issue.

eh not really; on a normal distro desktop you maybe have 10 
wakeups/sec or so; on a tuned one you have 2 or less.

> 
> Hmm. Maybe Anders' problem stems partly from the fact that he really is 
> using the tweaks to make that tickless theory more true than it tends to 
> be on most systems?

we fixed a TON of stuff over the last months.. standard desktops (F8 / 
next Ubuntu) will be around 10 wakeups/sec, in a lab environment you 
can get below 2 ;)
-
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/