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From: Jes Sorensen <jes@sgi.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>, linux-arch@vger.kernel.org
Subject: Re: larger per cpu data
Date: Tue, 24 Apr 2007 20:03:00 +0200	[thread overview]
Message-ID: <462E4654.4030405@sgi.com> (raw)
In-Reply-To: <617E1C2C70743745A92448908E030B2A0162DEC4@scsmsx411.amr.corp.intel.com>

Luck, Tony wrote:
>> 256KB * 1024 CPUs (or more) == verymightyhuge ..... I certainly
>> wouldn't like to see this.
> 
> "Only" 256M :-)  That 1024 cpu system probably has 1TB of memory or
> more ... so this isn't quite as terrible as it sounds (at least in
> terms of percentage of memory used).
> 
> Are there customers buying high cpu count, low memory systems?

I doubt it, but I don't have numbers. However 256M is still a good chunk
of memory that could be put to better use.

> But unless these are some fabulously useful counters that Andi
> wants to add ... I'd prefer to keep the ia64 percpu area at 64K
> for a while longer.

Nod, my thoughts exactly.

Cheers,
Jes

  reply	other threads:[~2007-04-24 18:03 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-20 10:46 larger per cpu data Andi Kleen
2007-04-20 18:23 ` Luck, Tony
2007-04-20 20:11   ` Andi Kleen
2007-04-20 20:23     ` Luck, Tony
2007-04-24 17:14       ` Jes Sorensen
2007-04-24 17:58         ` Luck, Tony
2007-04-24 18:03           ` Jes Sorensen [this message]
2007-04-21 20:23 ` Eric W. Biederman
2007-04-21 20:46   ` Andi Kleen
2007-04-21 20:53     ` Eric W. Biederman

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