Re: [CMake] How to determine the number of processors available from CMake code
Would be nice to have this as a module: http://cmake.org/Bug/view.php?id=11302
On 8. Oct, 2010, at 24:41 , David Cole wrote:
Thanks!
On Thu, Oct 7, 2010 at 6:08 PM, Mark Moll mm...@rice.edu wrote:
On OS X, this command might be easier / faster:
sysctl -n hw.ncpu
On Oct 7, 2010, at 3:50 PM, David Cole wrote:
I just posted a short blog article demonstrating how to figure out the
number of processors available for a make -j or a scripted ctest_build
call (with the Unix Makefiles generator) on Linux, Mac and Windows. Please
let me know if you have any ideas for how it might be improved or extended.
http://www.kitware.com/blog/home/post/63
Cheers,
David
Blog text copied here, too, for search-ability on the mailing list
archives:
==
At the end of this script snippet, the CMake variable PROCESSOR_COUNT has
a value appropriate for passing to make's -j for parallel builds.
When used in a ctest -S script, you can call...
if(PROCESSOR_COUNT)
set(CTEST_BUILD_FLAGS -j${PROCESSOR_COUNT})
endif()
...to enable parallel builds with Unix Makefiles and the ctest_build
command.
Here's the snippet:
if(NOT DEFINED PROCESSOR_COUNT)
# Unknown:
set(PROCESSOR_COUNT 0)
# Linux:
set(cpuinfo_file /proc/cpuinfo)
if(EXISTS ${cpuinfo_file})
file(STRINGS ${cpuinfo_file} procs REGEX ^processor.: [0-9]+$)
list(LENGTH procs PROCESSOR_COUNT)
endif()
# Mac:
if(APPLE)
find_program(cmd_sys_pro system_profiler)
if(cmd_sys_pro)
execute_process(COMMAND ${cmd_sys_pro} OUTPUT_VARIABLE info)
string(REGEX REPLACE ^.*Total Number Of Cores: ([0-9]+).*$ \\1
PROCESSOR_COUNT ${info})
endif()
endif()
# Windows:
if(WIN32)
set(PROCESSOR_COUNT $ENV{NUMBER_OF_PROCESSORS})
endif()
endif()
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[CMake] How to determine the number of processors available from CMake code
I just posted a short blog article demonstrating how to figure out the
number of processors available for a make -j or a scripted ctest_build
call (with the Unix Makefiles generator) on Linux, Mac and Windows. Please
let me know if you have any ideas for how it might be improved or extended.
http://www.kitware.com/blog/home/post/63
Cheers,
David
Blog text copied here, too, for search-ability on the mailing list archives:
==
At the end of this script snippet, the CMake variable PROCESSOR_COUNT has a
value appropriate for passing to make's -j for parallel builds.
When used in a ctest -S script, you can call...
if(PROCESSOR_COUNT)
set(CTEST_BUILD_FLAGS -j${PROCESSOR_COUNT})
endif()
...to enable parallel builds with Unix Makefiles and the ctest_build
command.
Here's the snippet:
if(NOT DEFINED PROCESSOR_COUNT)
# Unknown:
set(PROCESSOR_COUNT 0)
# Linux:
set(cpuinfo_file /proc/cpuinfo)
if(EXISTS ${cpuinfo_file})
file(STRINGS ${cpuinfo_file} procs REGEX ^processor.: [0-9]+$)
list(LENGTH procs PROCESSOR_COUNT)
endif()
# Mac:
if(APPLE)
find_program(cmd_sys_pro system_profiler)
if(cmd_sys_pro)
execute_process(COMMAND ${cmd_sys_pro} OUTPUT_VARIABLE info)
string(REGEX REPLACE ^.*Total Number Of Cores: ([0-9]+).*$ \\1
PROCESSOR_COUNT ${info})
endif()
endif()
# Windows:
if(WIN32)
set(PROCESSOR_COUNT $ENV{NUMBER_OF_PROCESSORS})
endif()
endif()
___
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Visit other Kitware open-source projects at
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Re: [CMake] How to determine the number of processors available from CMake code
Thanks!
On Thu, Oct 7, 2010 at 6:08 PM, Mark Moll mm...@rice.edu wrote:
On OS X, this command might be easier / faster:
sysctl -n hw.ncpu
On Oct 7, 2010, at 3:50 PM, David Cole wrote:
I just posted a short blog article demonstrating how to figure out the
number of processors available for a make -j or a scripted ctest_build
call (with the Unix Makefiles generator) on Linux, Mac and Windows. Please
let me know if you have any ideas for how it might be improved or extended.
http://www.kitware.com/blog/home/post/63
Cheers,
David
Blog text copied here, too, for search-ability on the mailing list
archives:
==
At the end of this script snippet, the CMake variable PROCESSOR_COUNT has
a value appropriate for passing to make's -j for parallel builds.
When used in a ctest -S script, you can call...
if(PROCESSOR_COUNT)
set(CTEST_BUILD_FLAGS -j${PROCESSOR_COUNT})
endif()
...to enable parallel builds with Unix Makefiles and the ctest_build
command.
Here's the snippet:
if(NOT DEFINED PROCESSOR_COUNT)
# Unknown:
set(PROCESSOR_COUNT 0)
# Linux:
set(cpuinfo_file /proc/cpuinfo)
if(EXISTS ${cpuinfo_file})
file(STRINGS ${cpuinfo_file} procs REGEX ^processor.: [0-9]+$)
list(LENGTH procs PROCESSOR_COUNT)
endif()
# Mac:
if(APPLE)
find_program(cmd_sys_pro system_profiler)
if(cmd_sys_pro)
execute_process(COMMAND ${cmd_sys_pro} OUTPUT_VARIABLE info)
string(REGEX REPLACE ^.*Total Number Of Cores: ([0-9]+).*$ \\1
PROCESSOR_COUNT ${info})
endif()
endif()
# Windows:
if(WIN32)
set(PROCESSOR_COUNT $ENV{NUMBER_OF_PROCESSORS})
endif()
endif()
___
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Follow this link to subscribe/unsubscribe:
http://www.cmake.org/mailman/listinfo/cmake
--
Mark Moll
___
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http://www.kitware.com/opensource/opensource.html
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Follow this link to subscribe/unsubscribe:
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