On 2021-06-03 10:27, Robert P. J. Day wrote: > On Thu, 3 Jun 2021, Dianne Skoll wrote: > > > On Thu, 3 Jun 2021 10:19:22 -0400 > > "Michael P. Soulier" <msoulier [ at ] digitaltorque [ dot ] ca> wrote: > > > > > On 2021-06-03 10:09 a.m., Dianne Skoll wrote: > > > > See the -j option > > > > > Seems like a race condition waiting to happen. > > > > 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. I routinely use make -j 8 on an 8-core machine to build the linux kernel. I only ran into problems when I tried to include the targets "modules_install" and "install" in the same multithreaded make command. It even works over NFS as long as the two clocks are reasonably close. > rday slainte mhath, RGB -- Richard Guy Briggs -- ~\ -- ~\ <hpv.tricolour.ca> <www.TriColour.ca> -- \___ o \@ @ Ride yer bike! Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\% Vote! -- <greenparty.ca>_____GTVS6#790__(*)__(*)________(*)(*)_________________ 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