linux-kernel - Re: In response to kernel compression e-mail a few months ago.

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Message-ID: <Pine.LNX.4.64.0710141827210.16884@p34.internal.lan>
Date:	Sun, 14 Oct 2007 18:28:26 -0400 (EDT)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
cc:	Al Viro <viro@....linux.org.uk>, linux-kernel@...r.kernel.org,
	apiszcz@...arrain.com
Subject: Re: In response to kernel compression e-mail a few months ago.

On Sun, 14 Oct 2007, Jan Engelhardt wrote:

>
> On Oct 14 2007 16:58, Justin Piszcz wrote:
>>
>> compress:
>>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>> 10544 war       20   0  700m 681m 1632 S  141 20.7   1:41.46 7z
>
> Just how you can utilize a CPU to 141% remains a mystery..
> [ to be noted this is sqrt(2)*100 ]
>

It uses 2 cores (multi-thread/multi-core), I believe the author of 7z (I 
asked him about this before) said the compression algorithm can use 
1.8-2.2 cpus.

Justin.
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