Hello: I am looking for some clarity with regards too parallel builds under Yocto... I think I had a false assumption on setting PARALEL_MAKE... To increase thread usage: You add following to your local.conf inside the build/conf directory. Replace x and y with your wanted configuration. PARALLEL_MAKE = "-j x"
BB_NUMBER_THREADS = "y" Is the following true ? PARALLEL_MAKE defines how many threads should be used/dedicated when using make -j command during do_compile. BB_NUMBER_THREADS defines number of threads dedicated for bitbake. I set up like so: There are 12 cores my board Yocto supporters say threads should be 2 times the number of cores, but don't go above 20..., or just the number cores, also under 20... depending on what you read. They also say, increasing PARALLEL_MAKE to higher values, increases your chance for a race condition. Is the following true ? PARALLEL_MAKE = "-j x" # For do_compile BB_NUMBER_THREADS = "y" # For bitbake PARALLEL_MAKEINST = "-j x" # For do_install If so, does this mean for 12 cores: BB_NUMBER_THREADS="8", will this dedicate 8 cores just for bitbake to use ? And does this dedicate the remaining 4 for do_compile and do_install ? PARALLEL_MAKE="-j 2" PARALLEL_MAKEINST="-j 2" Thank you... Steve
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