Re: Race condition on loading packages from 2 maxima processes in parallel?

On 6/15/26 10:43 AM, Robert Dodier wrote:

> On Sun, Jun 14, 2026 at 5:10 AM Gunter Königsmann via Maxima-discuss
> <[email protected]> wrote:
>
>> wxMaxima on every commit creates a new virtual machine, compiles wxMaxima in that machine and runs a few hundred tests in that machine.
>>
>> If it runs more than one test in parallel sometimes maxima fails to load draw.
>>
>> My theory is:
>>
>> One maxima process tries to load draw, compiles that package and starts saving it.
>> A second maxima process tries to load the compiled draw package while that compiled package still being written.
> Another potential source of problems is that Maxima wants to launch
> Gnuplot as a long-running process and talk to it through a pipe. I'm
> not sure what's going to happen if two instances of Maxima want to do
> some plotting -- does each instance of Maxima get a separate instance
> of Gnuplot, or do they inadvertently try to use the same one? (Both
 From gnuplot_defs.lisp, it looks like each Maxima instance will run 
gnuplot with a pipe (|start-gnuplot-process|), so these would be 
separate. But if you’re talking about two instances of Maxima running in 
separate threads, I guess they’ll use the same gnuplot process, assuming 
|*gnuplot-stream*| is the same variable in both threads. I don’t use 
threaded lisp, so I don’t know how that works.
&#8203;

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