diff options
| author |   Michael Hope <michael.hope@linaro.org> | 2011-09-28 23:40:42 (GMT) |
|---|---|---|
| committer | Michael Hope <michael.hope@linaro.org> | 2011-09-28 23:40:42 (GMT) |
| commit | 1c0488792d245101ceb4efca2223574c44fd0e67 (patch) | |
| tree | 1266a3164c02bc1c1fc9e6397b3cc459eb968a0f /scripts | |
| parent | 89cf5bb67fdae093db25ecb6a50f25a835c8ca6c (diff) | |
config: add a 'auto' value for the number of parallel jobs
When CT_PARALLEL_JOBS is -1, set the number of parallel jobs to the
number of online CPUs + 1. Update documentation to match.
I find this useful when building in the cloud. You can use the same
.config file and have the build adapt to the number of processors
available. Limited testing shows that NCPUS+1 is faster than NCPUS+0
or NCPUS+2.
Signed-off-by: Michael Hope <michael.hope@linaro.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/crosstool-NG.sh.in | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/crosstool-NG.sh.in b/scripts/crosstool-NG.sh.in index c2f35f6..6b6aa0e 100644 --- a/scripts/crosstool-NG.sh.in +++ b/scripts/crosstool-NG.sh.in @@ -488,7 +488,11 @@ if [ -z "${CT_RESTART}" ]; then # And help make go faster JOBSFLAGS= - [ ${CT_PARALLEL_JOBS} -ne 0 ] && JOBSFLAGS="${JOBSFLAGS} -j${CT_PARALLEL_JOBS}" + # Use the number of processors+1 when automatically setting the number of + # parallel jobs. Fall back to 1 if the host doesn't use GLIBC. + AUTO_JOBS=$((`getconf _NPROCESSORS_ONLN 2> /dev/null || echo 0` + 1)) + [ ${CT_PARALLEL_JOBS} -eq -1 ] && JOBSFLAGS="${JOBSFLAGS} -j${AUTO_JOBS}" + [ ${CT_PARALLEL_JOBS} -gt 0 ] && JOBSFLAGS="${JOBSFLAGS} -j${CT_PARALLEL_JOBS}" [ ${CT_LOAD} -ne 0 ] && JOBSFLAGS="${JOBSFLAGS} -l${CT_LOAD}" # We need to save the real .config with kconfig's value, |