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From: Andrew Morton <akpm@digeo.com>
To: Anton Blanchard <anton@samba.org>
Cc: William Lee Irwin III <wli@holomorphy.com>,
	Dave Hansen <haveblue@us.ibm.com>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: [lart] /bin/ps output
Date: Sun, 13 Oct 2002 12:25:10 -0700	[thread overview]
Message-ID: <3DA9C896.621CC3D3@digeo.com> (raw)
In-Reply-To: 20021012040959.GE7050@krispykreme

Anton Blanchard wrote:
> 
> > Bah! I'm at a competitive disadvantage because I've got a lesser
> > BITS_PER_LONG. No matter, NR_CPUS > BITS_PER_LONG shall be conquered
> > and the explosion of kernel threads will be quite visible (though
> > unfortunately probably post-freeze).
> 
> Speaking of which, the recent CONFIG_NR_CPUS addition shows just how
> bloated all our [NR_CPU] structures are. We need to get serious about
> using the per cpu data stuff. Going from 32 to 64 was over 500kB on my
> ppc64 build.
> 

Half of which is in timer.c.

mnm:/usr/src/25> size kernel/timer.o
   text    data     bss     dec     hex filename
   4960     100  167648  172708   2a2a4 kernel/timer.o

That's with NR_CPUS=32.  Show me yours.

Using the percpu stuff will not significantly reduce this.  Some
new data structure might be needed.

  parent reply	other threads:[~2002-10-13 19:19 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-12  3:36 [lart] /bin/ps output Dave Hansen
2002-10-12  3:38 ` David S. Miller
2002-10-12  3:55   ` Rik van Riel
2002-10-12 11:49     ` Alan Cox
2002-10-12  3:43 ` William Lee Irwin III
2002-10-12  3:51 ` Anton Blanchard
2002-10-12  3:59   ` William Lee Irwin III
2002-10-12  4:09     ` Anton Blanchard
2002-10-12  6:53       ` David S. Miller
2002-10-12 20:15         ` Richard Henderson
2002-10-13  6:27           ` David S. Miller
2002-10-13  6:42             ` Anton Blanchard
2002-10-13 18:25             ` Richard Henderson
2002-10-13 19:25       ` Andrew Morton [this message]
2002-10-19 12:22         ` Anton Blanchard
2002-11-16  9:24 ` William Lee Irwin III
2002-11-17  0:11   ` Alan Cox
2002-11-16 23:52     ` Chris Wedgwood
2002-11-17  0:11     ` William Lee Irwin III

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