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Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user
	memory)
From: Chandra Seetharaman <sekharan@us.ibm.com>
Reply-To: sekharan@us.ibm.com
To: Pavel Emelianov <xemul@openvz.org>
Cc: Rik van Riel <riel@redhat.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
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Date: Mon, 11 Sep 2006 11:47:09 -0700
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On Mon, 2006-09-11 at 11:02 +0400, Pavel Emelianov wrote:
<snip>

> >> In this case multithreaded apache that tries to serve each domain in
> >> separate BC will fill the memory with BC-s, held by pages allocated
> >> and mapped in threads.
> >>     
> >
> > I do not understand how the memory will be filled with BCs. Can you
> > explain, please.
> >   
> Sure. At the beginning I have one task with one BC. Then
> 1. A thread is spawned and new BC is created;

You do not have to create a new BC for each new thread, just associate
the thread to an existing appropriate BC.

> 2. New thread touches a new page (e.g. maps a new file) which is charged
> to new BC
>     (and this means that this BC's must stay in memory till page is
> uncharged);
> 3. Thread exits after serving the request, but since it's mm is shared
> with parent
>     all the touched pages stay resident and, thus, the new BC is still
> pinned in memory.
> Steps 1-3 are done multiple times for new pages (new files).
> Remember that we're discussing the case when pages are not recharged.
> 
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> ckrm-tech mailing list
> https://lists.sourceforge.net/lists/listinfo/ckrm-tech
-- 

----------------------------------------------------------------------
    Chandra Seetharaman               | Be careful what you choose....
              - sekharan@us.ibm.com   |      .......you may get it.
----------------------------------------------------------------------


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