int FindProcessorGroupIndex ( int procIdx ) { // In case of oversubscription spread extra workers in a round robin manner int holeIdx; const int numProcs = theProcessorGroups[ProcessorGroupInfo::NumGroups - 1].numProcsRunningTotal; if ( procIdx >= numProcs - 1 ) { holeIdx = INT_MAX; procIdx = (procIdx - numProcs + 1) % numProcs; } else holeIdx = ProcessorGroupInfo::HoleIndex; __TBB_ASSERT( hardware_concurrency_info == initialization_complete, "FindProcessorGroupIndex is used before AvailableHwConcurrency" ); // Approximate the likely group index assuming all groups are of the same size int i = procIdx / theProcessorGroups[0].numProcs; // Make sure the approximation is a valid group index if (i >= ProcessorGroupInfo::NumGroups) i = ProcessorGroupInfo::NumGroups-1; // Now adjust the approximation up or down if ( theProcessorGroups[i].numProcsRunningTotal > HoleAdjusted(procIdx, i) ) { while ( theProcessorGroups[i].numProcsRunningTotal - theProcessorGroups[i].numProcs > HoleAdjusted(procIdx, i) ) { __TBB_ASSERT( i > 0, NULL ); --i; } } else { do { ++i; } while ( theProcessorGroups[i].numProcsRunningTotal <= HoleAdjusted(procIdx, i) ); } __TBB_ASSERT( i < ProcessorGroupInfo::NumGroups, NULL ); return i; }
int FindProcessorGroupIndex ( int procIdx ) { // In case of oversubscription spread extra workers in a round robin manner int holeIdx; const int numProcs = theProcessorGroups[ProcessorGroupInfo::NumGroups - 1].numProcsRunningTotal; if ( procIdx >= numProcs - 1 ) { holeIdx = INT_MAX; procIdx = (procIdx - numProcs + 1) % numProcs; } else holeIdx = ProcessorGroupInfo::HoleIndex; __TBB_ASSERT( hardware_concurrency_info == initialization_complete, "FindProcessorGroupIndex is used before AvailableHwConcurrency" ); int i = procIdx / theProcessorGroups[0].numProcs; if ( theProcessorGroups[i].numProcsRunningTotal > HoleAdjusted(procIdx, i) ) { while ( theProcessorGroups[i].numProcsRunningTotal - theProcessorGroups[i].numProcs > HoleAdjusted(procIdx, i) ) { __TBB_ASSERT( i > 0, NULL ); --i; } } else { do { ++i; } while ( theProcessorGroups[i].numProcsRunningTotal <= HoleAdjusted(procIdx, i) ); } __TBB_ASSERT( i < ProcessorGroupInfo::NumGroups, NULL ); return i; }