Re: [Starpu-devel] [LU factorisation: gdb debug output]

[Maxim Abalenkov <maxim.abalenkov@gmail.com>]

Dear Samuel,

I hope all is well with you. May I please ask two questions:

a) What is the purpose of enforcing task execution on the home node? Is it always necessary, when I use the STARPU_DATA_MODE_ARRAY in “starpu_task_insert"? Please consider the code snippet I took from the “fmultiple_manual.c”:

    // Enforce task execution on home node (STARPU_MAIN_RAM)
    core_starpu_codelet_zgetrf_pnl.specific_nodes = 1;

    for (int i = 0; i < STARPU_NMAXBUFS; i++) {
        core_starpu_codelet_zgetrf_pnl.nodes[i] = STARPU_MAIN_RAM;
    }

b) Can you please direct me to an example(s) of using StarPU subtasks (tasks submitted by other tasks)?

Thank you and have a good evening!

—

Best wishes,

Maxim

Maxim Abalenkov \\ maxim.abalenkov@gmail.com
+44 7 486 486 505 \\ http://mabalenk.gitlab.io

On 28 Dec 2017, at 20:09, Samuel Thibault <samuel.thibault@inria.fr> wrote:

Maxim Abalenkov, on jeu. 28 déc. 2017 20:47:04 +0200, wrote:

       STARPU_DATA_MODE_ARRAY,    panel_desc,            A.mt,

My only problem is to unpack the tiles and the pivots vector together, one
after another inside the CPU kernel function. I can’t achieve this. Thank you.

data arrays appear merely as data, one after the other, in the descr
parameter, see for instance tests/main/insert_task_dyn_handles.c

Samuel