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bug#32548: Cuirass: Performance monitoring

From: Ludovic Courtès
Subject: bug#32548: Cuirass: Performance monitoring
Date: Fri, 18 Sep 2020 14:21:37 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

Hi Mathieu!

Mathieu Othacehe <othacehe@gnu.org> skribis:

>> How about also adding metrics per build machine? I have the impression,
>> for instance, that the aarch64 machine in my living room is not used.
>> If this is confirmed, we could take appropriate action (uncomment it in
>> /etc/machines.scm :-), compare to other used machines, change the scheduling
>> in the daemon, or even turn it off to conserve energy should it turn out
>> that we have too much build power...).
> Yes I would really like to have something like:
> https://hydra.nixos.org/machines, with a build rate for every machine.


> However, it cannot be done without structural changes to how offloading
> is handled. For now it's working this way:
> Cuirass -> guix-daemon -> guix offload -> build machines
> Which means that Cuirass has almost no information about offloaded
> builds.

In practice, it could parse the offload events that it gets; a bit of a
hack, but good enough.  However…

> We are currently starting discussions about inviting the Guix Build
> Coordinator to the party.

… this sounds like the better option longer-term.


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