diff options
| -rw-r--r-- | Config.in | 27 |
1 files changed, 12 insertions, 15 deletions
@@ -296,23 +296,12 @@ menu "Global build settings" config PKG_BUILD_PARALLEL bool prompt "Compile certain packages parallelized" - default n + default y help This adds a -jX option to certain packages that are known to - behave well for parallel build. - - Note that this may overcommit CPU resources depending on the - -j level of the main make process, the number of package - submake jobs selected below and the number of actual CPUs present. - Example: If the main make is passed a -j4 and the submake -j - is also set to 4, we may end up with 16 parallel make processes - in the worst case. - - You get maximum build performance, if you set the package build - jobs to the number of CPUs (cores) available and also start the main - make process with -jX, where X is the number of CPUs (cores). - However, make sure you have enough RAM available for - NR_CPUS to the power of two (NR_CPUS^2) make jobs. + behave well for parallel build. By default the package make processes + use the main jobserver, in which case this option only takes effect + when you add -jX to the make command. If you are unsure, select N. @@ -325,6 +314,14 @@ menu "Global build settings" This passes the main make process jobserver fds to package builds, enabling full parallelization across different packages + Note that disabling this may overcommit CPU resources depending on the + -j level of the main make process, the number of package + submake jobs selected below and the number of actual CPUs present. + Example: If the main make is passed a -j4 and the submake -j + is also set to 4, we may end up with 16 parallel make processes + in the worst case. + + config PKG_BUILD_JOBS int prompt "Number of package submake jobs (2-512)" |