Re: [Starpu-devel] Starpu stats about disk, OOC, and swapping

[Samuel Thibault <samuel.thibault@inria.fr>]

Amani Alonazi, le lun. 14 janv. 2019 22:06:03 +0300, a ecrit:
> On Mon, Jan 14, 2019 at 9:31 PM Samuel Thibault 
> <[1]samuel.thibault@inria.fr>
> wrote:
> 
>     Amani Alonazi, le lun. 14 janv. 2019 21:24:33 +0300, a ecrit:
>     > Hopefully last question :-) I'm using STARPU_DISK_SWAP_BACKEND=unistd.
>     How can
>     > I analyze how much data transferred to disk during OOC computation? 
> Shall
>     I
>     > assume that anything exceeds the sustained BW that it runs at  the
>     sustained
>     > BW?
>     >
>     > I clearly notice the extra time required in executing each tasks with 
> big
>     /
>     > smaller STARPU_LIMIT_CPU_MEM. I just want to quantify the amount of
>     transfer in
>     > /out to disk.
> 
>     I'm not sure which precise information do you want.  Do you mean you
>     want to know *during the execution* the amount of data transferred so
>     far?
> 
>     We can easily add a function to get this.
> 
> Yes, I would like to know during the execution.

The function is actually already available, it's
starpu_bus_get_profiling_info(). You can look at
_starpu_profiling_bus_helper_display_summary() in
src/profiling/profiling_helpers.c to have a usage example.

Samuel