linux-kernel - Re: Question about fair schedulers

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]

Date:	Tue, 26 Jun 2007 14:19:41 +0200
From:	Helge Hafting <helge.hafting@...el.hist.no>
To:	Alberto Gonzalez <info@...bu.es>
CC:	Kyle Moffett <mrmacman_g4@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Question about fair schedulers

Alberto Gonzalez wrote:
> On Saturday 23 June 2007, Kyle Moffett wrote:
>   
>> On Jun 22, 2007, at 18:07:15, Alberto Gonzalez wrote:
>>     
>>> Ok, so what will a fair scheduler do in this case? It is my
>>> understanding that it would give 50% CPU to each task, resulting in
>>> the video dropping frames. Is this correct?
>>>       
>> Yes, that's correct.
>>
>> What this *actually* means is that you want the media player to have
>> higher priority than the DVD ripping program.  Ergo you should run
>> "nice +20 my_dvd_burner" or "nice +20 my_vorbis_encoder" under CFS or
>> other fair schedulers.
>>     
>
> Ok, that makes sense. The problem is that desktop users don't know about such 
> things, so the ideal situation would be that the scheduler knows about it and 
> does it for you.
>   
Well, the scheduler can't really know that.  But the people who
write the dvd burning/ripping/encoding/viewing software
know what is needed, they can write their programs so they set useful 
priorities.

Helge Hafting
-
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/