Ensemble parallelism

[joernwichmann]

I am playing with Ensemble parallelism, and I run this basic example to observe how local/global ranks work.

Running this script with mpiexec -n 4 ... yields the following

The console log warns about possible deadlocks. How do I prevent deadlocks from happening?

[connorjward]

First please share code using code blocks (inside backticks) rather than screenshots. It makes the code harder to reproduce if we were to want to run it ourselves.

How up-to-date is your Firedrake? @JDBetteridge recently made some changes to this teardown code.

[colinjcotter]

@connorjward is it possible to block images from discussions? I can’t even read these screenshots because of the blurring.

[dham]

The problem is that there are legitimate use cases. E.g. posting a plot of a solution

[colinjcotter]

We probably just need a “nudge” in the issue template then. On 2 Feb 2024, at 08:39, David A. Ham ***@***.***> wrote:  The problem is that there are legitimate use cases. E.g. posting a plot of a solution — Reply to this email directly, view it on GitHub<#3381 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABOSV4TVCTZMHIVOOFZC6KTYRSQ45AVCNFSM6AAAAABCV5MH62VHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DGNBTHAYDA>. You are receiving this because you commented.Message ID: ***@***.***>

[JDBetteridge]

As @connorjward says please update your Firedrake install. You may still see errors, but they will not be fatal. (there's another other fix in the pipeline to make those go away)

[joernwichmann]

Indeed, the update solved the issue. Thanks for your help.