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List Archive: gentoo-amd64
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To: gentoo-amd64@g.o
From: Dale <rdalek1967@...>
Subject: Re: Memory usage; 32 bit vs 64 bit.
Date: Mon, 03 Jan 2011 15:46:28 -0600
Mark Knecht wrote:
> On Mon, Jan 3, 2011 at 10:34 AM, Dale<rdalek1967@...>  wrote:
>    
>> Hi folks,
>>
>> I recently built me a new 64 bit system.  My old 32 bit system has 2Gbs and
>> my new system has 4Gbs.  I was expecting it to use about the same amount of
>> memory but noticed it uses a good bit more on the new system than the old
>> one.   With just the normal stuff open, I use about 1.5Gbs of ram.  My old
>> system would use a little over half that.   I have the same settings on
>> both.
>>
>> Is this difference because 64 bit programs use more memory, maybe they are
>> larger than 32 bit programs?  Just curious.  I notice that Seamonkey uses
>> more and KDE's plasma-desktop uses more.  Those are generally the biggest
>> users.
>>
>> I'm not complaining about the usage, just curious as to why the difference.
>>
>> Dale
>>
>> :-)  :-)
>>
>>
>>      
> Hi Dale,
>     That seems way high to me but I cannot do a real comparison here as
> I haven't had a 32-bit X86 machine in 4-5 years. My current box is
> tied up running 3 copies of Windows at the moment and is using pretty
> much 12GB at the moment so I'd have to reboot to take any reading.
> However I seem to remember only 350MB being used right at the point of
> logging into KDE, but I could be wrong about that.
>
>     Maybe post a few numbers:
>
> 1) What is used when you first start KDE
> 2) The additions for a few common apps.
>
>     I'd be happy to compare mine to yours later today.
>
> - Mark
>
>
>    

Well, I start with a saved session.  I usually have seamonkey, Konsole, 
Konqueror, Kpatience and gkrellm running.  I also run folding at well.  
I have checked when folding is not running and it still uses more.  I 
use the same settings as on my old rig for folding.  I may change to 
larger units when I get another stick or two of ram in here.

Here is some results from top with them sorted by memory usage:

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
18913 dale      20   0  793m 303m  30m S    3  7.7  21:35.05 seamonkey-bin
18451 dale      20   0  871m 165m  40m S    1  4.2  40:47.95 plasma-desktop
28665 root      39  19  304m 112m 2616 S   94  2.8   1918:38 FahCore_a3.exe
25414 dale      20   0  607m 107m 9.8m S    0  2.7   1:33.53 knotify4
18453 dale      20   0  591m  99m  15m S    0  2.5   0:23.53 knotify4
18417 dale      20   0  618m  90m  41m S    2  2.3  23:59.85 kwin
26081 root      39  19  280m  80m 2616 S   99  2.0   2138:13 FahCore_a3.exe
28654 root      39  19  277m  80m 2616 S   99  2.0   1916:58 FahCore_a3.exe
27537 root      39  19  280m  80m 2616 S   96  2.0   2021:21 FahCore_a3.exe
  5081 dale      20   0  474m  73m  31m S    0  1.9   0:31.91 konqueror
18225 root      20   0  142m  61m  15m S    4  1.6  92:24.29 X
18541 dale      20   0  470m  58m  27m S    0  1.5   0:35.72 kopete
29937 root      20   0  573m  53m  35m S    0  1.4   0:26.64 konqueror
26809 dale      20   0  202m  49m  30m S    0  1.2   0:29.16 mplayer
18566 dale      20   0  367m  48m  27m S    0  1.2   0:01.00 python2.6
18564 dale      20   0  418m  45m  24m S    0  1.1   0:00.49 python2
11802 root      20   0  721m  43m  11m S    0  1.1   1:19.41 knotify4
18539 dale      20   0  408m  38m  20m S    0  1.0   2:11.97 kpat
18491 dale      20   0  584m  37m  20m S    0  0.9   0:08.12 krunner
18544 dale      20   0  356m  34m  17m S    0  0.9   0:47.28 konsole
18371 dale      20   0  230m  31m  22m S    0  0.8   0:00.48 kdeinit4
18527 dale      20   0  417m  31m  16m S    0  0.8   0:00.48 kmix
18374 dale      20   0  409m  29m  16m S    0  0.7   0:05.96 kded4

As you can tell, Seamonkey has been running a while.  It still uses a 
good bit even when freshly started.  Here is my flags:

CFLAGS="-march=native -O2 -pipe"
CXXFLAGS="${CFLAGS}"

I got them off a wiki for safe flags.  I like fast but hate crashes.  ;-)

Dale

:-)  :-)


Replies:
Re: Memory usage; 32 bit vs 64 bit.
-- Darragh Bailey
References:
Memory usage; 32 bit vs 64 bit.
-- Dale
Re: Memory usage; 32 bit vs 64 bit.
-- Mark Knecht
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Updated Jun 28, 2012

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