[Scilab-users] Headless graphics in scilab: time & memory issues

[Antoine Monmayrant]

Hello again,

Just to add to my previous message: increasing nx or ny in my script can 
crash scilab during the call to xend().
On my small local machine, this occurs for:

    nx=4000;
    ny=3000;

for which scilab takes ~7 seconds to create the png in "normal" mode...

Can any of you confirm this bug?

Antoine

On 03/12/2020 09:48, Antoine Monmayrant wrote:
>
> Hello all,
>
> In these days of remote working, I need to use again scilab in 
> headless mode to generate graphics.
>
> In other words, I connect  in command line only to a remote server 
> where scilab is installed and I want it to generate graphics using a 
> combination of driver, xinit and xend.
>
> There seems to be some issues with driver/xinit/xend: huge memory 
> overhead and long computation time that makes it impossible to 
> generate some plots in headless mode.
>
> For example, a simple Sgrayplot that takes ~1 second to plot and save 
> to a png in normal mode takes more than 200 seconds and huge amount of 
> ram in headless mode (see attached test script).
>
> I also have some plots that works without a problem in normal mode, 
> but fail in headless mode because of some memory limitation:
>
>     xend: An error occurred: Unable to create export file, not enough
>     memory. Decreasing the number of elements or the size of the
>     figure should fix this error.
>
> Is there a way to get around these problems?
>
> Thanks for your help,
>
> Antoine
>
>
>
>
>
>
>
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