Limit the gem native build resources
When building the native extension make -j can absorb all available
resources on a system. Implement "reasonable" limits on the number
of compiling jobs when the number of processors can be detected and
use a conservative count when ruby version does not provide detection.
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index b379664..ecb6623 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -27,6 +27,7 @@
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+require 'etc'
require 'mkmf'
LIBDIR = RbConfig::CONFIG['libdir']
@@ -80,7 +81,9 @@
unless windows
puts 'Building internal gRPC into ' + grpc_lib_dir
- system("make -j -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
+ nproc = 4
+ nproc = Etc.nprocessors * 2 if Etc.respond_to? :nprocessors
+ system("make -j#{nproc} -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
exit 1 unless $? == 0
end