以編程方式獲得OS X中的GPU百分比使用率

Question

是否有一種標准的方法可以在OS X（10.6和10.7）上獲得Cocoa / Objective-C中的GPU百分比使用率？

Answer 1

享受它，GPU和RAM使用，不適用於謹慎的GPU btw因為它不暴露性能監控字典。 我的MBP有一個NVIDIA gpu，也應該在ATI工作，但我不確定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;
}

Answer 2

據我所知，沒有Carbon函數可以直接執行此操作，因此最好的選擇可能是使用Mach API來詢問內核。

Apple Dev上的這個例子。 圖書館應該讓你入門。