Created
September 5, 2013 10:33
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kod z multiprocessing
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| def cpu_count(): | |
| ''' | |
| Returns the number of CPUs in the system | |
| ''' | |
| if sys.platform == 'win32': | |
| try: | |
| num = int(os.environ['NUMBER_OF_PROCESSORS']) | |
| except (ValueError, KeyError): | |
| num = 0 | |
| elif 'bsd' in sys.platform or sys.platform == 'darwin': | |
| comm = '/sbin/sysctl -n hw.ncpu' | |
| if sys.platform == 'darwin': | |
| comm = '/usr' + comm | |
| try: | |
| with os.popen(comm) as p: | |
| num = int(p.read()) | |
| except ValueError: | |
| num = 0 | |
| else: | |
| try: | |
| num = os.sysconf('SC_NPROCESSORS_ONLN') | |
| except (ValueError, OSError, AttributeError): | |
| num = 0 | |
| if num >= 1: | |
| return num | |
| else: | |
| raise NotImplementedError('cannot determine number of cpus') |
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