Hi, Currently, BB_NUMBER_THREADS and PARALLEL_MAKE use the number of cores available unless told otherwise. This was a good idea six years ago[1] but some modern machines are moving to very large core counts.
For example, 88 core dual Xeons are fairly common. A ThunderX2 has 256 cores (2 sockets, 4 hyperthreads per physical core). The Ampere Altra is dual socket 2*80=160 cores. At this level of parallelisation the sheer amount of I/O from the unpack storm is quite excessive. As a strawman argument, I propose a hard cap to the default BB_NUMBER_THREADS of -- and I'm literally making up numbers here -- 32. Maybe 64. Comments? Cheers, Ross [1] http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=1529ef0504542145f2b81b2dba4bcc81d5dac96e
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