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From: Richard Fish <bigfish@asmallpond.org>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] top and/or ps without all the java threads
Date: Fri, 29 Jul 2005 08:44:42 +0200	[thread overview]
Message-ID: <42E9D05A.4060704@asmallpond.org> (raw)
In-Reply-To: <6474B60C-9AC4-4069-B49A-9632358A0D2D@shire.net>

Chad Leigh -- Shire.Net LLC wrote:

> Hi
>
> Is there a way to get a ps or top like display of processes that  
> shows just the master process and not all the threads as separate  
> processes for java programs?  This is on a 2.4.30 hardened gentoo  
> system.


For 2.4.30, I don't know of any way to do this, because as far as the 
kernel is concerned, every thread really is a separate process.  They 
are just communicating via signals and shared memory.  I think it is 
pretty much impossible for another process like top or ps to figure out 
whether something is a 'thread' or a 'process' with 2.4.

If you use 2.6 and nptl+nptlonly, this is handled automatically.  Notice 
my ps output for thunderbird:

carcharias rjf # ps -A xw -f | grep thunderbird
rjf        978   963  0 07:06 ?        Sl     0:50 
/usr/lib/mozilla-thunderbird/thunderbird-bin -mail

carcharias rjf # ps -A xw -f -L | grep thunderbird
rjf        978   963   978  0    4 07:06 ?        Sl     0:49 
/usr/lib/mozilla-thunderbird/thunderbird-bin -mail
rjf        978   963   982  0    4 07:06 ?        Sl     0:00 
/usr/lib/mozilla-thunderbird/thunderbird-bin -mail
rjf        978   963   984  0    4 07:06 ?        Sl     0:00 
/usr/lib/mozilla-thunderbird/thunderbird-bin -mail
rjf        978   963 14672  0    4 08:38 ?        Sl     0:00 
/usr/lib/mozilla-thunderbird/thunderbird-bin -mail

-Richard

-- 
gentoo-user@gentoo.org mailing list



      reply	other threads:[~2005-07-29  6:46 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-29  5:58 [gentoo-user] top and/or ps without all the java threads Chad Leigh -- Shire.Net LLC
2005-07-29  6:44 ` Richard Fish [this message]

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