Bug 212592
| Summary: | Default MAKE_JOBS_NUMBER should come from cpuset, not kern.smp.cpus | ||
|---|---|---|---|
| Product: | Ports & Packages | Reporter: | Colin Percival <cperciva> |
| Component: | Ports Framework | Assignee: | Port Management Team <portmgr> |
| Status: | Closed Feedback Timeout | ||
| Severity: | Affects Only Me | CC: | ports-bugs |
| Priority: | --- | ||
| Version: | Latest | ||
| Hardware: | Any | ||
| OS: | Any | ||
when trying with:
cpuset -g -p $$ | awk -F: '/^pid [0-9]+ mask/ { print split($$2,a, ",") }'
(your example didn't work out of box, due to cpuset reporting 2 lines now.)
Anyway using this we end up with cpuset: getaffinity: Operation not permitted
|
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.)