+ auto numProcessors = 0;
+ auto numCores = 0;
+ auto numPhysicalIds = 0;
+
+ int value;
+ size_t size = sizeof(value);
+
+ int result = sysctlbyname("hw.packages", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numPhysicalIds = value;
+
+ result = sysctlbyname("hw.logicalcpu", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numProcessors = value;
+
+ result = sysctlbyname("hw.physicalcpu", &value, &size, NULL, 0);
+ SWR_ASSERT(result == 0);
+ numCores = value;
+
+ out_nodes.resize(numPhysicalIds);
+
+ for (auto physId = 0; physId < numPhysicalIds; ++physId)
+ {
+ auto &numaNode = out_nodes[physId];
+ auto procId = 0;
+
+ numaNode.cores.resize(numCores);
+
+ while (procId < numProcessors)
+ {
+ for (auto coreId = 0; coreId < numaNode.cores.size(); ++coreId, ++procId)
+ {
+ auto &core = numaNode.cores[coreId];
+
+ core.procGroup = coreId;
+ core.threadIds.push_back(procId);
+ }
+ }
+ }
+
+ out_numThreadsPerProcGroup = 0;
+
+ for (auto &node : out_nodes)
+ {
+ for (auto &core : node.cores)
+ {
+ out_numThreadsPerProcGroup += core.threadIds.size();
+ }
+ }
+