Understanding the time command

[NoOp]

On 08/12/2010 04:24 AM, Gary Jarrel wrote:
> Hi All
> 
> I found that one of my systems runs a bit sluggish, and interestingly
> enough it's the one with the fastest processor and most memory. My
> feeling is that the problem is somewhere in HDD access (IO problem of
> some sort) So before I spend countless hours on finding where the
> problem is I though I'd do one quick test as follows:
> 
> time tar xvf file.tgz
> 
> file.tgz is 600Mb in size and my results:
> 
> System A (sluggish feeling)
> 
> real	0m13.268s
> user	0m3.890s
> sys	0m13.090s
> 
> System B
> 
> real	0m12.918s
> user	0m3.300s
> sys	0m0.990s
> 
> Now I am trying to understand why the huge difference in sys time but
> not in the others.
> 
> Some specs of the systems: System A - Core i7, 12GB RAM. System B -
> Core i5 8GB RAM!
> 
> The main difference is System B runs an Adaptec RAID Controller with 2
> Seagate SATAII Enterprise drives while System A has a Samsung 750GB
> SATAII drive connected to the SATA controller of an MSI Motherboard!

I wonder if it's related to the issues giovani pointed out in this thread:

<http://comments.gmane.org/gmane.linux.ubuntu.user/223975>
[Fwd: Re: Linux Desktop Responsiveness Patches - Encouragement for
iimplementing ; jor ubuntu]

https://bugzilla.kernel.org/show_bug.cgi?id=12309
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/131094?comments=all
http://www.phoronix.com/scan.php?page=news_item&px=ODQ3OQ