[Bug 212592] Default MAKE_JOBS_NUMBER should come from cpuset, not kern.smp.cpus

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212592

            Bug ID: 212592
           Summary: Default MAKE_JOBS_NUMBER should come from cpuset, not
                    kern.smp.cpus
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Ports Framework
          Assignee: portmgr at FreeBSD.org
          Reporter: cperciva at FreeBSD.org
                CC: freebsd-ports-bugs at FreeBSD.org

The default MAKE_JOBS_NUMBER comes from `sysctl -n kern.smp.cpus`.  This is
fine in most cases, but if cpuset(1) has been used to limit the CPUs available,
we will end up running too many parallel build steps -- one per CPU present,
rather than one per CPU available.

Unfortunately cpuset(1) doesn't seem to have an obvious "tell me how many CPUs
I have access to" flag, but something like

-_SMP_CPUS!=             ${SYSCTL} -n kern.smp.cpus
+_SMP_CPUS!=             cpuset -g -p $$ | cut -f 2 -d : | tr , '\n' | wc -l

should probably do the job.  (Or, we could just fix cpuset(1) and check
OSVERSION to decide whether to query the sysctl or query cpuset.)

-- 
You are receiving this mail because:
You are on the CC list for the bug.