mirror of
https://github.com/reactos/CMake.git
synced 2024-11-27 13:30:39 +00:00
1c87bc60ee
The previous code did not count the number of virtual processors across
physical processors on SunOS.
Can handle the following situations:
```
$ uname -a
SunOS solaris 5.11 11.4.0.15.0 i86pc i386 i86pc
$ psrinfo -p -v
The physical processor has 1 virtual processor (0)
x86 (GenuineIntel 306D2 family 6 model 61 step 2 clock 3492 MHz)
Intel Core Processor (Broadwell)
The physical processor has 1 virtual processor (1)
x86 (GenuineIntel 306D2 family 6 model 61 step 2 clock 3492 MHz)
Intel Core Processor (Broadwell)
The physical processor has 1 virtual processor (2)
x86 (GenuineIntel 306D2 family 6 model 61 step 2 clock 3492 MHz)
Intel Core Processor (Broadwell)
The physical processor has 1 virtual processor (3)
x86 (GenuineIntel 306D2 family 6 model 61 step 2 clock 3492 MHz)
Intel Core Processor (Broadwell)
```
```
$ uname -a
SunOS sol11x86 5.11 11.0 i86pc i386 i86pc
$ psrinfo -p -v
The physical processor has 2 virtual processors (0 1)
x86 (GenuineIntel 50650 family 6 model 85 step 0 clock 2000 MHz)
Intel(r) Xeon(r) Gold 6138 CPU @ 2.00GHz
```
```
$ uname -a
SunOS sol11 5.11 11.0 sun4v sparc sun4v
$ psrinfo -p -v
The physical processor has 2 cores and 16 virtual processors (0-15)
The core has 8 virtual processors (0-7)
The core has 8 virtual processors (8-15)
SPARC-T4 (chipid 0, clock 2848 MHz)
```
238 lines
8.4 KiB
CMake
238 lines
8.4 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
ProcessorCount
|
|
--------------
|
|
|
|
ProcessorCount(var)
|
|
|
|
Determine the number of processors/cores and save value in ${var}
|
|
|
|
Sets the variable named ${var} to the number of physical cores
|
|
available on the machine if the information can be determined.
|
|
Otherwise it is set to 0. Currently this functionality is implemented
|
|
for AIX, cygwin, FreeBSD, HPUX, Linux, macOS, QNX, Sun and
|
|
Windows.
|
|
|
|
This function is guaranteed to return a positive integer (>=1) if it
|
|
succeeds. It returns 0 if there's a problem determining the processor
|
|
count.
|
|
|
|
Example use, in a ctest -S dashboard script:
|
|
|
|
::
|
|
|
|
include(ProcessorCount)
|
|
ProcessorCount(N)
|
|
if(NOT N EQUAL 0)
|
|
set(CTEST_BUILD_FLAGS -j${N})
|
|
set(ctest_test_args ${ctest_test_args} PARALLEL_LEVEL ${N})
|
|
endif()
|
|
|
|
|
|
|
|
This function is intended to offer an approximation of the value of
|
|
the number of compute cores available on the current machine, such
|
|
that you may use that value for parallel building and parallel
|
|
testing. It is meant to help utilize as much of the machine as seems
|
|
reasonable. Of course, knowledge of what else might be running on the
|
|
machine simultaneously should be used when deciding whether to request
|
|
a machine's full capacity all for yourself.
|
|
#]=======================================================================]
|
|
|
|
# A more reliable way might be to compile a small C program that uses the CPUID
|
|
# instruction, but that again requires compiler support or compiling assembler
|
|
# code.
|
|
|
|
function(ProcessorCount var)
|
|
# Unknown:
|
|
set(count 0)
|
|
|
|
if(WIN32)
|
|
# Windows:
|
|
set(count "$ENV{NUMBER_OF_PROCESSORS}")
|
|
#message("ProcessorCount: WIN32, trying environment variable")
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# Mac, FreeBSD, OpenBSD (systems with sysctl):
|
|
find_program(ProcessorCount_cmd_sysctl sysctl
|
|
PATHS /usr/sbin /sbin)
|
|
mark_as_advanced(ProcessorCount_cmd_sysctl)
|
|
if(ProcessorCount_cmd_sysctl)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_sysctl} -n hw.ncpu
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE count)
|
|
#message("ProcessorCount: trying sysctl '${ProcessorCount_cmd_sysctl}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# Linux (systems with nproc):
|
|
# Prefer nproc to getconf if available as getconf may return the host CPU count in Linux containers
|
|
find_program(ProcessorCount_cmd_nproc nproc)
|
|
mark_as_advanced(ProcessorCount_cmd_nproc)
|
|
if(ProcessorCount_cmd_nproc)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_nproc}
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE count)
|
|
#message("ProcessorCount: trying nproc '${ProcessorCount_cmd_nproc}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# Linux (systems with getconf):
|
|
find_program(ProcessorCount_cmd_getconf getconf)
|
|
mark_as_advanced(ProcessorCount_cmd_getconf)
|
|
if(ProcessorCount_cmd_getconf)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_getconf} _NPROCESSORS_ONLN
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE count)
|
|
#message("ProcessorCount: trying getconf '${ProcessorCount_cmd_getconf}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# HPUX (systems with machinfo):
|
|
find_program(ProcessorCount_cmd_machinfo machinfo
|
|
PATHS /usr/contrib/bin)
|
|
mark_as_advanced(ProcessorCount_cmd_machinfo)
|
|
if(ProcessorCount_cmd_machinfo)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_machinfo}
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE machinfo_output)
|
|
string(REGEX MATCHALL "Number of CPUs = ([0-9]+)" procs "${machinfo_output}")
|
|
set(count "${CMAKE_MATCH_1}")
|
|
if(NOT count)
|
|
string(REGEX MATCHALL "([0-9]+) logical processors" procs "${machinfo_output}")
|
|
set(count "${CMAKE_MATCH_1}")
|
|
endif()
|
|
#message("ProcessorCount: trying machinfo '${ProcessorCount_cmd_machinfo}'")
|
|
else()
|
|
find_program(ProcessorCount_cmd_mpsched mpsched)
|
|
mark_as_advanced(ProcessorCount_cmd_mpsched)
|
|
if(ProcessorCount_cmd_mpsched)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_mpsched} -s
|
|
OUTPUT_QUIET
|
|
ERROR_STRIP_TRAILING_WHITESPACE
|
|
ERROR_VARIABLE mpsched_output)
|
|
string(REGEX MATCHALL "Processor Count *: *([0-9]+)" procs "${mpsched_output}")
|
|
set(count "${CMAKE_MATCH_1}")
|
|
#message("ProcessorCount: trying mpsched -s '${ProcessorCount_cmd_mpsched}'")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# AIX (systems with lsconf):
|
|
find_program(ProcessorCount_cmd_lsconf lsconf
|
|
PATHS /usr/sbin)
|
|
mark_as_advanced(ProcessorCount_cmd_lsconf)
|
|
if(ProcessorCount_cmd_lsconf)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_lsconf}
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE lsconf_output)
|
|
string(REGEX MATCHALL "Number Of Processors: ([0-9]+)" procs "${lsconf_output}")
|
|
set(count "${CMAKE_MATCH_1}")
|
|
#message("ProcessorCount: trying lsconf '${ProcessorCount_cmd_lsconf}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# QNX (systems with pidin):
|
|
find_program(ProcessorCount_cmd_pidin pidin)
|
|
mark_as_advanced(ProcessorCount_cmd_pidin)
|
|
if(ProcessorCount_cmd_pidin)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_pidin} info
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE pidin_output)
|
|
string(REGEX MATCHALL "Processor[0-9]+: " procs "${pidin_output}")
|
|
list(LENGTH procs count)
|
|
#message("ProcessorCount: trying pidin '${ProcessorCount_cmd_pidin}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# Sun (systems where psrinfo tool is available)
|
|
find_program(ProcessorCount_cmd_psrinfo psrinfo PATHS /usr/sbin /sbin)
|
|
mark_as_advanced(ProcessorCount_cmd_psrinfo)
|
|
if (ProcessorCount_cmd_psrinfo)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_psrinfo} -p -v
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE psrinfo_output)
|
|
string(REGEX MATCHALL "has [0-9]+ virtual processor" procs "${psrinfo_output}")
|
|
set(count "")
|
|
foreach(proc ${procs})
|
|
string(REGEX MATCH "has ([0-9]+) virtual" res ${proc})
|
|
math(EXPR count "${count} + ${CMAKE_MATCH_1}")
|
|
endforeach()
|
|
#message("ProcessorCount: trying '${ProcessorCount_cmd_psrinfo}' -p -v")
|
|
else()
|
|
# Sun (systems where uname -X emits "NumCPU" in its output):
|
|
find_program(ProcessorCount_cmd_uname uname)
|
|
mark_as_advanced(ProcessorCount_cmd_uname)
|
|
if(ProcessorCount_cmd_uname)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_uname} -X
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE uname_X_output)
|
|
string(REGEX MATCHALL "NumCPU = ([0-9]+)" procs "${uname_X_output}")
|
|
set(count "${CMAKE_MATCH_1}")
|
|
#message("ProcessorCount: trying uname -X '${ProcessorCount_cmd_uname}'")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
# Execute this code when all previously attempted methods return empty
|
|
# output:
|
|
#
|
|
if(NOT count)
|
|
# Systems with /proc/cpuinfo:
|
|
set(cpuinfo_file /proc/cpuinfo)
|
|
if(EXISTS "${cpuinfo_file}")
|
|
file(STRINGS "${cpuinfo_file}" procs REGEX "^processor.: [0-9]+$")
|
|
list(LENGTH procs count)
|
|
#message("ProcessorCount: trying cpuinfo '${cpuinfo_file}'")
|
|
endif()
|
|
endif()
|
|
|
|
if(NOT count)
|
|
# Haiku
|
|
find_program(ProcessorCount_cmd_sysinfo sysinfo)
|
|
if(ProcessorCount_cmd_sysinfo)
|
|
execute_process(COMMAND ${ProcessorCount_cmd_sysinfo}
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
OUTPUT_VARIABLE sysinfo_X_output)
|
|
string(REGEX MATCHALL "\nCPU #[0-9]+:" procs "\n${sysinfo_X_output}")
|
|
list(LENGTH procs count)
|
|
#message("ProcessorCount: trying sysinfo '${ProcessorCount_cmd_sysinfo}'")
|
|
endif()
|
|
endif()
|
|
|
|
# Since cygwin builds of CMake do not define WIN32 anymore, but they still
|
|
# run on Windows, and will still have this env var defined:
|
|
#
|
|
if(NOT count)
|
|
set(count "$ENV{NUMBER_OF_PROCESSORS}")
|
|
#message("ProcessorCount: last fallback, trying environment variable")
|
|
endif()
|
|
|
|
# Ensure an integer return (avoid inadvertently returning an empty string
|
|
# or an error string)... If it's not a decimal integer, return 0:
|
|
#
|
|
if(NOT count MATCHES "^[0-9]+$")
|
|
set(count 0)
|
|
endif()
|
|
|
|
set(${var} ${count} PARENT_SCOPE)
|
|
endfunction()
|