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authorFelix Fietkau <nbd@openwrt.org>2012-09-28 18:09:41 +0000
committerFelix Fietkau <nbd@openwrt.org>2012-09-28 18:09:41 +0000
commitc02bd635b29d4fd2c798cd28ae28b45c3cf1d407 (patch)
tree05382675107d4b4de93eab6ffabfef3796a7fcf7
parentc53936bb4b0d4ae2d17d74e55b221553dd92dbd8 (diff)
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build: turn on package parallel builds by default and fix descriptions.
By default, this is only used when building with make -j. SVN-Revision: 33582
-rw-r--r--Config.in27
1 files changed, 12 insertions, 15 deletions
diff --git a/Config.in b/Config.in
index e5b3346fe2..bd4f63ea43 100644
--- a/Config.in
+++ b/Config.in
@@ -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)"