Diff of /branches/vis12/src/lib/parallel-target/cpu.c

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	revision 1830, Fri Apr 13 13:33:27 2012 UTC	revision 1831, Fri Apr 13 13:33:40 2012 UTC
#	Line 17	Line 17
17	#endif	#endif
18	#include <errno.h>	#include <errno.h>
19
20	/*! \brief determine the number of CPUs */	/*! \brief determine the number of CPUs
21	bool GetNumCPUs (CPUInfo_t *info)	*  \return true if there is an error, false otherwise.
22		*/
23		bool Diderot_GetNumCPUs (CPUInfo_t *info)
24	{	{
25	#if defined(HAVE__PROC_CPUINFO)	#if defined(HAVE__PROC_CPUINFO)
26	/* Get information from /proc/cpuinfo.  The interesting	/* Get information from /proc/cpuinfo.  The interesting
#	Line 63	Line 65
65	info->numThdsPerCore = info->numHWThreads / info->numHWCores;	info->numThdsPerCore = info->numHWThreads / info->numHWCores;
66	#endif	#endif
67
68	return true;	return false;
69	}	}
70	else {	else {
71	fprintf(stderr, "unable to determine the number of processors\n");	fprintf(stderr, "unable to determine the number of processors\n");
72	return false;	return true;
73	}	}
74	#elif defined(__APPLE__)	#elif defined(__APPLE__)
75	size_t      len = sizeof(int);	size_t      len = sizeof(int);
#	Line 80	Line 82
82	}	}
83	else {	else {
84	fprintf(stderr, "unable to determine the number of nodes\n");	fprintf(stderr, "unable to determine the number of nodes\n");
85	return false;	return true;
86	}	}
87	}	}
88
89	/* the number of cores */	/* the number of cores */
90	if (sysctlbyname("hw.physicalcpu", &(info->numHWCores), &len, 0, 0) < 0) {	if (sysctlbyname("hw.physicalcpu", &(info->numHWCores), &len, 0, 0) < 0) {
91	fprintf(stderr, "unable to determine the number of physical CPUs\n");	fprintf(stderr, "unable to determine the number of physical CPUs\n");
92	return false;	return true;
93	}	}
94
95	/* the number of hardware threads */	/* the number of hardware threads */
#	Line 98	Line 100
100	}	}
101	else {	else {
102	fprintf(stderr, "unable to determine the number of logical CPUs\n");	fprintf(stderr, "unable to determine the number of logical CPUs\n");
103	return false;	return true;
104	}	}
105	}	}
106
107	info->numCoresPerNode = info->numHWCores / info->numHWNodes;	info->numCoresPerNode = info->numHWCores / info->numHWNodes;
108	info->numThdsPerCore = info->numHWThreads / info->numHWCores;	info->numThdsPerCore = info->numHWThreads / info->numHWCores;
109
	return true;
	#else
110	return false;	return false;
111		#else
112		return true;
113	#endif	#endif
114
115	} /* end of GetNumCPUs */	} /* end of GetNumCPUs */

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