On Mon, Dec 04, 2000 at 11:04:54PM -0500, Christopher D. Carothers wrote:
> Hi all. I have a dual, 400 Mhz P-II system (Micron Netframe)
> running Linux 2.2.17 patched with RT Linux 3.0 pre9. I am having trouble
> spawning/creating threads on specific processors. Currently, the
> init_module routine creates a pthread to the start_routine of the system.
> This routine will then create additional threads such that the number of
> threads total is equal to the number of processors available to the
> system. It should be noted that NONE of these threads are set to be
> periodic. Thus, when this system/kernel module goes on, the Linux OS does
> not respond. This is the behavior we want, as we are trying to achieve
> maximum performance and do want any interference from the OS, unless it is
> specifically needed (which is never at the current time) . The
> application is a parallel, discrete-event simulator -- one that will be
> meet real-time deadlines in the grand scheme.
Please take a look at examples/reserve_cpu.c
>
> The simulator runs fine sequentially, but as soon as I attempt to
> spawn additional threads and pin them to a specific processor using the
> pthread_attr_setcpu_np RTL system call the simulator goes into an address
> space that does not appear to be in the address space of my kernel module.
> That is to say, gdb does not no where this code is from -- but an
> interrupt has occured...
>
> Also, if I spawn the original thread from the init_module such
> that is is force to be on processor 1 (and not 0, as done by default), I
> see TLB flush errors coming from the Linux kernel and the OS locks up.
>
> So, anyone have any suggestions on how to spawn non-periodic
> pthreads onto distinct processors?
I need some more details: RTLinux version, Linux version, code-fragment.
>
> Any help would be most appreciated
>
> Thank you!,
> Chris
>
> --------------------------------------------------------------------
> Christopher D. Carothers
>
> Assistant Professor
> Department of Computer Science
> Rensselaer Polytechnic Institute
> 110 8th Street
> Troy, New York 12180-3590
>
> e-mail: [EMAIL PROTECTED]
> web page: www.cs.rpi.edu/~chrisc
> phone: (518) 276-2930
> fax: (518) 276-4033
> --------------------------------------------------------------------
>
>
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