this post was submitted on 19 May 2024
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I think it can also get weird when you call other makefiles, like if you go
make -j64
at the top level and that thing goes on to call make on subprojects, that can be a looooot of threads of that-j
gets passed down. So even on that 64 core machine, now you have possibly 4096 jobs going, and it surfaces bugs that might not have been a problem when we had 2-4 cores (oh no, make is running 16 jobs at once, the horror).