Examples with MM_HeapRegionListPointer com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionListPointer used on opensource projects

Example 1 with MM_HeapRegionListPointer

use of com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionListPointer in project openj9 by eclipse.

the class DumpSegregatedStatsCommand method run.

public void run(String command, String[] args, Context context, PrintStream out) throws DDRInteractiveCommandException {
    if (!GCExtensions.isSegregatedHeap()) {
        out.append("Only valid for a segregated heap\n");
        return;
    }
    try {
        /* Get the region pool */
        MM_GCExtensionsPointer extensions = GCExtensions.getGCExtensionsPointer();
        MM_RealtimeGCPointer realtimeGC = MM_RealtimeGCPointer.cast(extensions._globalCollector());
        MM_RegionPoolSegregatedPointer regionPool = realtimeGC._memoryPool()._regionPool();
        /* Get the size classes */
        J9JavaVMPointer vm = J9RASHelper.getVM(DataType.getJ9RASPointer());
        J9VMGCSizeClassesPointer sizeClasses = vm.realtimeSizeClasses();
        long countTotal = 0;
        long countAvailableSmallTotal = 0;
        long countFullSmallTotal = 0;
        long darkMatterBytesTotal = 0;
        long allocCacheBytesTotal = 0;
        /* arrayOffset is the total offset into a two dimensional array.  Used to walk the 
			 * the array linearly */
        long arrayOffset = J9Consts.J9VMGC_SIZECLASSES_MIN_SMALL * MM_RegionPoolSegregated.NUM_DEFRAG_BUCKETS;
        out.append("sizeClass | full | available           | total | free cell count | dark | cache\n");
        out.append("===============================================================================\n");
        for (long sizeClassIndex = J9Consts.J9VMGC_SIZECLASSES_MIN_SMALL; sizeClassIndex <= J9Consts.J9VMGC_SIZECLASSES_MAX_SMALL; sizeClassIndex++) {
            /* Print the sizeclass */
            UDATA cellSize = sizeClasses.smallCellSizesEA().at(sizeClassIndex);
            out.format("%2d: %5d | ", sizeClassIndex, cellSize.longValue());
            MM_HeapRegionListPointer heapRegionQueue = MM_HeapRegionListPointer.cast(regionPool._smallFullRegionsEA().at(sizeClassIndex));
            long countSmall = getTotalRegions(heapRegionQueue);
            countFullSmallTotal += countSmall;
            /* Print the number of full regions of this size class */
            out.format("%4d | ", countSmall);
            /* The number of free cells of this sizeclass */
            long freeCellCount = 0;
            for (long i = 0; i < MM_RegionPoolSegregated.NUM_DEFRAG_BUCKETS; i++) {
                long count = 0;
                MM_LockingHeapRegionQueuePointer heapRegionList = MM_LockingHeapRegionQueuePointer.cast(regionPool._smallAvailableRegionsEA().add(arrayOffset).at(0));
                for (long j = 0; j < regionPool._splitAvailableListSplitCount().longValue(); j++) {
                    count += getTotalRegions(heapRegionList);
                    freeCellCount += getFreeCellCount(heapRegionList);
                    heapRegionList = heapRegionList.add(1);
                }
                /* increment to the next list */
                arrayOffset += 1;
                countSmall += count;
                countAvailableSmallTotal += count;
                /* Print the number of available regions in this defrag bucket */
                out.format("%4d ", count);
            }
            countTotal += countSmall;
            /* Print the total number of regions of this size class, and the number of free cells */
            out.format("| %5d | %15d |", countSmall, freeCellCount);
            /* Print the percentage of darkmatter in this region */
            long darkMatterCellCount = regionPool._darkMatterCellCountEA().at(sizeClassIndex).longValue();
            darkMatterBytesTotal += darkMatterCellCount * cellSize.longValue();
            out.format("%%%3d | ", countSmall == 0 ? 0 : darkMatterCellCount / (countSmall * cellSize.longValue()));
            /* Calculate the number of bytes in allocation caches */
            long allocCacheSize = 0;
            J9VMThreadPointer mainThread = vm.mainThread();
            if (mainThread.notNull()) {
                J9VMThreadPointer threadCursor = vm.mainThread();
                do {
                    J9VMGCSegregatedAllocationCacheEntryPointer cache = threadCursor.segregatedAllocationCache();
                    cache = cache.add(sizeClassIndex);
                    allocCacheSize += cache.top().longValue() - cache.current().longValue();
                    threadCursor = threadCursor.linkNext();
                } while (!threadCursor.eq(mainThread));
            }
            out.format("%5d\n", allocCacheSize);
            allocCacheBytesTotal += allocCacheSize;
        }
        long regionSize = extensions.heap()._heapRegionManager()._regionSize().longValue();
        out.format("region size %d\n", regionSize);
        long arrayletLeafSize = extensions._omrVM()._arrayletLeafSize().longValue();
        out.format("arraylet leaf size %d\n", arrayletLeafSize);
        out.format("small total (full, available) region count %d (%d, %d)\n", countTotal, countFullSmallTotal, countAvailableSmallTotal);
        long countFullArraylet = getTotalRegions(regionPool._arrayletFullRegions());
        long countAvailArraylet = getTotalRegions(regionPool._arrayletAvailableRegions());
        long countTotalArraylet = countFullArraylet + countAvailArraylet;
        countTotal += countTotalArraylet;
        out.format("arraylet total (full, available) region count %d (%d %d)\n", countTotalArraylet, countFullArraylet, countAvailArraylet);
        long countLarge = getTotalRegions(regionPool._largeFullRegions());
        countTotal += countLarge;
        out.format("large full region count %d\n", countLarge);
        long countFree = getTotalRegions(regionPool._singleFreeList());
        countTotal += countFree;
        out.format("free region count %d\n", countFree);
        long countMultiFree = getTotalRegions(regionPool._multiFreeList());
        countTotal += countMultiFree;
        out.format("multiFree region count %d\n", countMultiFree);
        long countCoalesce = getTotalRegions(regionPool._coalesceFreeList());
        countTotal += countCoalesce;
        out.format("coalesce region count %d\n", countCoalesce);
        long heapSize = countTotal * regionSize;
        out.format("total region count %d, total heap size %d \n", countTotal, heapSize);
        out.format("dark matter total bytes %d (%2.2f%% of heap)\n", darkMatterBytesTotal, 100.0 * darkMatterBytesTotal / heapSize);
        out.format("allocation cache total bytes %d (%2.2f%% of heap)\n", allocCacheBytesTotal, 100.0 * allocCacheBytesTotal / heapSize);
    } catch (CorruptDataException e) {
        e.printStackTrace();
    }
}

Example 2 with MM_HeapRegionListPointer

use of com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionListPointer in project openj9 by eclipse.

the class DumpSegregatedStatsCommand method getTotalRegions.

/**
 * Based off of MM_HeapRegionQueue::getTotalRegions. Returns the number of regions.
 * This function will calculate the number of regions differently according to the type of
 * the actual subclass.
 * @throws CorruptDataException
 */
public long getTotalRegions(MM_HeapRegionListPointer heapRegionList) throws CorruptDataException {
    long count = 0;
    StructurePointer heapRegionQueue = heapRegionList.getAsRuntimeType();
    if (heapRegionQueue instanceof MM_LockingHeapRegionQueuePointer) {
        MM_LockingHeapRegionQueuePointer lockingHeapRegionQueue = (MM_LockingHeapRegionQueuePointer) heapRegionQueue;
        if (lockingHeapRegionQueue._singleRegionsOnly()) {
            count = lockingHeapRegionQueue._length().longValue();
        } else {
            MM_HeapRegionDescriptorSegregatedPointer heapRegionDescriptorSegregated = lockingHeapRegionQueue._head();
            while (heapRegionDescriptorSegregated.notNull()) {
                count += heapRegionDescriptorSegregated._regionsInSpan().longValue();
                heapRegionDescriptorSegregated = heapRegionDescriptorSegregated._next();
            }
        }
    } else if (heapRegionQueue instanceof MM_LockingFreeHeapRegionListPointer) {
        MM_LockingFreeHeapRegionListPointer lockingFreeHeapRegionQueue = (MM_LockingFreeHeapRegionListPointer) heapRegionQueue;
        MM_HeapRegionDescriptorSegregatedPointer heapRegionDescriptorSegregated = lockingFreeHeapRegionQueue._head();
        while (heapRegionDescriptorSegregated.notNull()) {
            count += heapRegionDescriptorSegregated._regionsInSpan().longValue();
            heapRegionDescriptorSegregated = heapRegionDescriptorSegregated._next();
        }
    } else {
        throw new CorruptDataException("Bad HeapRegionList type");
    }
    return count;
}

Example 3 with MM_HeapRegionListPointer

use of com.ibm.j9ddr.vm29.pointer.generated.MM_HeapRegionListPointer in project openj9 by eclipse.

the class DumpSegregatedStatsCommand method getFreeCellCount.

/**
 * Count the number of free cells in the entire MM_HeapRegionList
 * @throws CorruptDataException
 */
public long getFreeCellCount(MM_HeapRegionListPointer heapRegionList) throws CorruptDataException {
    StructurePointer heapRegionQueue = heapRegionList.getAsRuntimeType();
    long freeCellCount = 0;
    if (heapRegionQueue instanceof MM_LockingHeapRegionQueuePointer) {
        MM_LockingHeapRegionQueuePointer lockingHeapRegionQueue = (MM_LockingHeapRegionQueuePointer) heapRegionQueue;
        MM_HeapRegionDescriptorSegregatedPointer heapRegionDescriptorSegregated = lockingHeapRegionQueue._head();
        while (heapRegionDescriptorSegregated.notNull()) {
            freeCellCount += getFreeCellCount(heapRegionDescriptorSegregated);
            heapRegionDescriptorSegregated = heapRegionDescriptorSegregated._next();
        }
    } else if (heapRegionQueue instanceof MM_LockingFreeHeapRegionListPointer) {
        MM_LockingFreeHeapRegionListPointer lockingFreeHeapRegionQueue = (MM_LockingFreeHeapRegionListPointer) heapRegionQueue;
        MM_HeapRegionDescriptorSegregatedPointer heapRegionDescriptorSegregated = lockingFreeHeapRegionQueue._head();
        while (heapRegionDescriptorSegregated.notNull()) {
            freeCellCount += getFreeCellCount(heapRegionDescriptorSegregated);
            heapRegionDescriptorSegregated = heapRegionDescriptorSegregated._next();
        }
    } else {
        throw new CorruptDataException("Bad HeapRegionList type");
    }
    return freeCellCount;
}