Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.linux.embedded > #464

Re: Set Processor Affinity for x86

Show all headers | View raw

On Wed, 24 Apr 2013 01:57:52 -0700, ghosh.subhasish wrote:

> Hi,
> 
> I need to understand how to run a function on a core other than the
> current.
> 
> For example, my main() function could be on core-0, but I want to run a
> function on core-1.
> 
> There are APIs in Linux like sched_setaffinity();
> 
> The platform that I am using does not have any OS or scheduler.
> 


You are in for a treat. It's easy in Linux because there's a lot if 
infrastructure already present; you have to accomplish equivalent 
preparation yourself. Essentially, different cores are separate CPUs that 
simply look at the same memory; they all execute some code (possibly even 
same code, e.g. if they were all in idle loop or idle wait). If you want 
another CPU to execute some routine you have prepared for it, you just 
have to tell the dispatcher running on that CPU to jump to the memory 
area where you placed your code.

Back to comp.os.linux.embedded | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Set Processor Affinity for x86 ghosh.subhasish@gmail.com - 2013-04-24 01:57 -0700
  Re: Set Processor Affinity for x86 Przemek Klosowski <przemek@tux.dot.org> - 2013-04-25 02:08 +0000
    Re: Set Processor Affinity for x86 ghosh.subhasish@gmail.com - 2013-04-25 09:12 -0700

csiph-web