macOS: Also consider compressed pages as usable.#89
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It should be possible to put them in swap relatively cheaply.
Contributor
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I guess my main question is do we expect users to expect to be able to use their device while running tests? If not then this is probably fine for a test package. |
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Author
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It doesn't kill the device, just makes it slightly sluggish while paging out stuff. I'd say that's acceptable, no? |
Contributor
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Probably. And someone could always just set the # jobs manually to a value they know is safe if they need to keep using it. |
Collaborator
Author
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Yeah. I say we try this out. |
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I noticed that on my system ParallelTestRunner only ever used a single worker. This because my memory usage is:
So only taking free + inactive + purgeable into account gives us 2.8G, only enough for a single worker, while adding the compressed pages brings it to 10G allowing 5 workers. AFAIU these compressed pages should be safe to ignore, as they can be swapped out. I verified here that given a 10GiB computation I can allocate a 10GiB array without killing my system (although it was a bit angry while swapping out the compressed pages).
cc @christiangnrd