From: Michael Mol <mikemol@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Dual or Quad CPU complications?
Date: Sun, 16 Dec 2012 10:58:15 -0500 [thread overview]
Message-ID: <CA+czFiAA+b8rRGwTYnoNpffVquLjCZpcV7=SVTaESMO-5ji1=Q@mail.gmail.com> (raw)
In-Reply-To: <2349232.AYnSBWEt4m@eve>
On Sun, Dec 16, 2012 at 10:39 AM, J. Roeleveld <joost@antarean.org> wrote:
> On Sunday, December 16, 2012 01:52:46 PM Volker Armin Hemmann wrote:
>> Am Samstag, 15. Dezember 2012, 20:57:24 schrieb J. Roeleveld:
>> > Even on a system with only 2 sockets, it can be useful to have NUMA
>> > available.
>>
>> or not, because it costs you performance.
>
> When does it cost performance?
> In all situations?
It adds some additional logic to memory allocation (put an allocation
near the process that uses it) and to process scheduling (keep the
process near its memory, but bump it to a more distant idle core if
necessary).
In all honestly, it's not a performance loss you're likely to notice,
unless you're so in need of squeezing out every spare cycle that you
most definitely _have_ hardware where there are disconnected memory
banks. I'm not convinced it's even measurable for us mundanes and our
hardware.
>
>> And while the starting questions were not stupid this thread is overflowing
>> with stupid answers.
>
> Matter of opinion...
Indeed.
--
:wq
next prev parent reply other threads:[~2012-12-16 16:00 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-13 6:12 [gentoo-user] Dual or Quad CPU complications? Grant
2012-12-13 6:23 ` Alan McKinnon
2012-12-13 7:36 ` Florian Philipp
2012-12-13 7:44 ` J. Roeleveld
2012-12-13 13:01 ` Luis Gustavo Vilela de Oliveira
2012-12-13 13:14 ` Rafa Griman
2012-12-13 14:13 ` Bruce Hill
2012-12-15 0:40 ` Mick
2012-12-15 11:49 ` Florian Philipp
2012-12-14 7:43 ` Grant
2012-12-14 8:47 ` Rafa Griman
2012-12-14 9:44 ` Grant
2012-12-14 10:03 ` Rafa Griman
2012-12-14 22:26 ` Grant
2012-12-15 3:16 ` Grant
2012-12-15 3:25 ` Michael Mol
2012-12-15 12:40 ` Florian Philipp
2012-12-15 17:56 ` Volker Armin Hemmann
2012-12-13 15:55 ` [gentoo-user] " James
2012-12-14 7:53 ` Rafa Griman
2012-12-13 18:18 ` [gentoo-user] " Michael Hampicke
2012-12-13 18:22 ` Volker Armin Hemmann
2012-12-14 7:55 ` Rafa Griman
2012-12-14 8:00 ` Grant
2012-12-15 17:49 ` Volker Armin Hemmann
2012-12-15 19:46 ` Grant
2012-12-15 19:57 ` J. Roeleveld
2012-12-16 12:52 ` Volker Armin Hemmann
2012-12-16 15:39 ` J. Roeleveld
2012-12-16 15:58 ` Michael Mol [this message]
2012-12-17 7:00 ` J. Roeleveld
2012-12-17 9:09 ` Michael Mol
2012-12-17 10:29 ` J. Roeleveld
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