> On Jun 3, 2021, at 10:27, Robert P. J. Day <rpjday [ at ] crashcourse [ dot ] ca> wrote: > >> >> Shouldn't be. My understanding (which may be wrong) is that make >> calculates the dependency graph first, not in parallel. Then it >> executes as many parallel tasks as the -j option asks for, or that >> make sense... whichever is smaller. Since the dependency graph is a >> DAG, make should, in theory, be smart enough to see that two >> dependencies depend on the same node and run only one job to build >> the depended-upon node. >> >> I routinely use "make -j `nproc`" and have never run into any >> issues. > > this was my understanding as well, i just wanted to hear some > confirmation from someone else. Diane is correct. As long as the dependency graph is specified properly in the Makefile, make -j should work fine. I have ran make -j for ffmpeg and x265 on an AMD EPYC server with 128 threads. Amazing how fast a build can be and how much RAM can be sucked up with a few hundred compiles stacked up waiting to run. /sc To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org