environment/lib/python2.7/site-packages/psutil/_pslinux.py
def _get_num_cpus():
    """Return the number of CPUs on the system"""
    # we try to determine num CPUs by using different approaches.
    # SC_NPROCESSORS_ONLN seems to be the safer and it is also
    # used by multiprocessing module
    try:
        return os.sysconf("SC_NPROCESSORS_ONLN")
    except ValueError:
        # as a second fallback we try to parse /proc/cpuinfo
        num = 0
        f = open('/proc/cpuinfo', 'r')
        try:
            lines = f.readlines()
        finally:
            f.close()
        for line in lines:
            if line.lower().startswith('processor'):
                num += 1

    # unknown format (e.g. amrel/sparc architectures), see:
    # http://code.google.com/p/psutil/issues/detail?id=200
    # try to parse /proc/stat as a last resort
    if num == 0:
        f = open('/proc/stat', 'r')
        try:
            lines = f.readlines()
        finally:
            f.close()
        search = re.compile('cpu\d')
        for line in lines:
            line = line.split(' ')[0]
            if search.match(line):
                num += 1

    if num == 0:
        raise RuntimeError("can't determine number of CPUs")
    return num
def _get_num_cpus():
    # we try to determine num CPUs by using different approaches.
    # SC_NPROCESSORS_ONLN seems to be the safer and it is also
    # used by multiprocessing module
    try:
        return os.sysconf("SC_NPROCESSORS_ONLN")
    except ValueError:
        # as a second fallback we try to parse /proc/cpuinfo
        num = 0
        f = open('/proc/cpuinfo', 'r')
        try:
            lines = f.readlines()
        finally:
            f.close()
        for line in lines:
            if line.lower().startswith('processor'):
                num += 1

    # unknown format (e.g. amrel/sparc architectures), see:
    # http://code.google.com/p/psutil/issues/detail?id=200
    # try to parse /proc/stat as a last resort
    if num == 0:
        f = open('/proc/stat', 'r')
        try:
            lines = f.readlines()
        finally:
            f.close()
        search = re.compile('cpu\d')
        for line in lines:
            line = line.split(' ')[0]
            if search.match(line):
                num += 1

    if num == 0:
        raise RuntimeError("can't determine number of CPUs")
    return num
def _get_num_cpus ( ) : # we try to determine num CPUs by using different approaches. # SC_NPROCESSORS_ONLN seems to be the safer and it is also # used by multiprocessing module try : return os . sysconf ( "SC_NPROCESSORS_ONLN" ) except ValueError : # as a second fallback we try to parse /proc/cpuinfo num = 0 f = open ( '/proc/cpuinfo' , 'r' ) try : lines = f . readlines ( ) finally : f . close ( ) for line in lines : if line . lower ( ) . startswith ( 'processor' ) : num += 1 # unknown format (e.g. amrel/sparc architectures), see: # http://code.google.com/p/psutil/issues/detail?id=200 # try to parse /proc/stat as a last resort if num == 0 : f = open ( '/proc/stat' , 'r' ) try : lines = f . readlines ( ) finally : f . close ( ) search = re . compile ( 'cpu\d' ) for line in lines : line = line . split ( ' ' ) [ 0 ] if search . match ( line ) : num += 1 if num == 0 : raise RuntimeError ( "can't determine number of CPUs" ) return num
Return the number of CPUs on the system
Return the number of CPUs on the system