linux-kernel - Re: Scalability Question

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Message-ID: <CAFLxGvxP0PzuvSrPY3rUW7hdKXK2aGK1W0wn_RWubX28YFv5nQ@mail.gmail.com>
Date:	Sat, 5 Jul 2014 05:44:42 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Nick Krause <xerofoify@...il.com>
Cc:	Mike Galbraith <umgwanakikbuti@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Scalability Question

On Sat, Jul 5, 2014 at 5:33 AM, Nick Krause <xerofoify@...il.com> wrote:
> The most powerful super computer runs Ubuntu with over 3.2 million cores.

These kind of computers don't run a single kernel.
See grid computing.

> There fore I can state that Linux is very good at scaling as I have seem
> the other side with embedded systems.
> Cheers Nick
>
> On Fri, Jul 4, 2014 at 11:24 PM, Mike Galbraith
> <umgwanakikbuti@...il.com> wrote:
>> On Fri, 2014-07-04 at 16:40 -0400, Nick Krause wrote:
>>> I am curious after reading some outdated kernel papers, how scalable
>>> is the kernel of
>>> late? I am curious mostly in memory and cpu subsystems as file systems
>>> will change
>>> based on user's choice.
>>
>> You can currently configure for up to 8192 CPUs.  I've not seen any
>> benchmark data whatsoever for huge boxen, have no idea where which
>> subsystem crumbles.  SGI asked for the increase to 8192, so presumably
>> do manage to squeeze acceptable performance out of size XXXXL boxen.
>>
>> -Mike
>>
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-- 
Thanks,
//richard
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