以编程方式获取 OS X 中的 GPU 使用百分比

是否有标准方法可以在 OS X（10.6 和 10.7）上的 Cocoa/Objective-C 中获取 GPU 使用百分比？

享受它吧，GPU 和 RAM 使用情况，在谨慎的 GPU 上不起作用，顺便说一句，因为它不会公开性能监控字典。我的 MBP 有 NVIDIA gpu，应该也可以在 ATI 上运行，但我不确定 100%

#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;
}