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OS X (10.6 および 10.7) 上の Cocoa/Objective-C で GPU 使用率を取得する標準的な方法はありますか?

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1 に答える 1

8

それを楽しんでください、GPUとRAMの使用量は、パフォーマンス監視辞書を公開しないため、控えめなGPUでは機能しません。私の MBP には NVIDIA GPU が搭載されており、ATI でも動作するはずですが、100% はわかりません

#include <CoreFoundation/CoreFoundation.h>
#include <Cocoa/Cocoa.h>
#include <IOKit/IOKitLib.h>

int main(int argc, const char * argv[])
{

while (1) {

    // Get dictionary of all the PCI Devicces
    CFMutableDictionaryRef matchDict = IOServiceMatching(kIOAcceleratorClassName);

    // Create an iterator
    io_iterator_t iterator;

    if (IOServiceGetMatchingServices(kIOMasterPortDefault,matchDict,
                                     &iterator) == kIOReturnSuccess)
    {
        // Iterator for devices found
        io_registry_entry_t regEntry;

        while ((regEntry = IOIteratorNext(iterator))) {
            // Put this services object into a dictionary object.
            CFMutableDictionaryRef serviceDictionary;
            if (IORegistryEntryCreateCFProperties(regEntry,
                                                  &serviceDictionary,
                                                  kCFAllocatorDefault,
                                                  kNilOptions) != kIOReturnSuccess)
            {
                // Service dictionary creation failed.
                IOObjectRelease(regEntry);
                continue;
            }

            CFMutableDictionaryRef perf_properties = (CFMutableDictionaryRef) CFDictionaryGetValue( serviceDictionary, CFSTR("PerformanceStatistics") );
            if (perf_properties) {

                static ssize_t gpuCoreUse=0;
                static ssize_t freeVramCount=0;
                static ssize_t usedVramCount=0;

                const void* gpuCoreUtilization = CFDictionaryGetValue(perf_properties, CFSTR("GPU Core Utilization"));
                const void* freeVram = CFDictionaryGetValue(perf_properties, CFSTR("vramFreeBytes"));
                const void* usedVram = CFDictionaryGetValue(perf_properties, CFSTR("vramUsedBytes"));
                if (gpuCoreUtilization && freeVram && usedVram)
                {
                    CFNumberGetValue( (CFNumberRef) gpuCoreUtilization, kCFNumberSInt64Type, &gpuCoreUse);
                    CFNumberGetValue( (CFNumberRef) freeVram, kCFNumberSInt64Type, &freeVramCount);
                    CFNumberGetValue( (CFNumberRef) usedVram, kCFNumberSInt64Type, &usedVramCount);
                    NSLog(@"GPU: %.3f%% VRAM: %.3f%%",gpuCoreUse/(double)10000000,usedVramCount/(double)(freeVramCount+usedVramCount)*100.0);

                }

            }

            CFRelease(serviceDictionary);
            IOObjectRelease(regEntry);
        }
        IOObjectRelease(iterator);
    }

   sleep(1);
}
return 0;
}
于 2014-03-16T17:25:49.360 に答える