On Tue, Jul 12, 2016 at 7:54 PM, Chaos Zhang <zcsd2...@gmail.com> wrote:
> Hi, all, > > I was trying to compile my project using CMake, after CMake generated > Makefile. > I used `/usr/bin/time -v make` to make the Makefile, got the result: > 'Percent of CPU this job got: 96%'. > Then i used `/usr/bin/time -v make -j8` to make the Makefile, the result of > CPU used is 'Percent of CPU this job got: 648%'. > So i wonder if Makefile generated by CMake support make -jN, BTW my CPU is > I7-4790, and after i use 'cat /proc/cpuinfo', there are 8 processors. > > All the sources, headers, etc come from the IO system, from the disk, probably you're running into the bottleneck of how long it takes to move the memory for the compiler to do work on? did you profile IO ? > Thanks a lot, > Chao > > > > -- > View this message in context: > http://cmake.3232098.n2.nabble.com/Does-Makefile-generated-by-CMake-support-make-jN-tp7593949.html > Sent from the CMake mailing list archive at Nabble.com. > -- > > Powered by www.kitware.com > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Kitware offers various services to support the CMake community. For more > information on each offering, please visit: > > CMake Support: http://cmake.org/cmake/help/support.html > CMake Consulting: http://cmake.org/cmake/help/consulting.html > CMake Training Courses: http://cmake.org/cmake/help/training.html > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/cmake >
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