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How do I tell colcon to tell cmake to tell make --jobs?

asked 2021-03-22 16:59:40 -0600

rubicks gravatar image

Here's something that saturates all 12 of my available cores:

colcon build --parallel-workers=3

How do I tell colcon build to use at most three cores at any given time?

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answered 2021-03-23 08:09:41 -0600

rubicks gravatar image

Colcon doesn't do that. Or, rather, it does, but only in ways that sacrifice one of the two "independent dimensions of parallelization".

Here's the first way:

MAKEFLAGS=-j1 colcon build --parallel-workers=3

Here's the second way:

MAKEFLAGS=-j3 colcon build --executor sequential
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answered 2021-03-22 20:43:34 -0600

130s gravatar image

updated 2021-03-22 20:44:16 -0600

The thread #q368249 explains colcon's parallelization.

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Asked: 2021-03-22 16:59:40 -0600

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Last updated: Mar 23 '21