From: gregory.clement@free-electrons.com (Gregory CLEMENT)
To: linux-arm-kernel@lists.infradead.org
Subject: How many cores does the ARM branch support?
Date: Tue, 02 Oct 2012 09:42:19 +0200 [thread overview]
Message-ID: <506A9ADB.4060306@free-electrons.com> (raw)
In-Reply-To: <20121002043106.GD21233@work1>
On 10/02/2012 06:31 AM, Michelle Konzack wrote:
> Hello OverGeeks and *,
>
Hello Michelle,
> I have gotten a new gadget which run only with 700MHz but has 32 cores. Support 16 GE Interfaces a 50 Gbit universal interface and 4 PCIe ports, SATA HDD and much more...
>
> ...and yes, this ARM microcontroller is a telecommunications controller.
>
> However, I have the Evaluation Kit and a PCIe graphiccard and now installed Debian ARMEL. Unfortunately I get only 2 cores working...
>
> What must I do to get the other 30 cores?
You have to check that your kernel was compiled with CONFIG_NR_CPUS = 32.
Checks also that you don't have "nr_cpus=2" in your kernel parameter.
>
> (without them, my Marvel Discovery MV78200 us 5 times faster)
>
> And is it possibel, to get 100 cores running? (this is the bigger version of the microcontroller I have)
Currently the maximum number of core supported is limited to 32.
the NR_CPUS range is from 2 to 32 for ARM.
Regards,
Gregory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2012-10-02 7:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-02 4:31 How many cores does the ARM branch support? Michelle Konzack
2012-10-02 7:42 ` Gregory CLEMENT [this message]
2012-10-02 10:04 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-02 12:48 ` Arnd Bergmann
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