def usegpu()

in route.py [0:0]

• 17 lines of code
• 5 McCabe index (conditional complexity)

def usegpu(need_gpu_count=1):
    nouse=[]
    for index in range(pynvml.nvmlDeviceGetCount()):
        # 这里的0是GPU id 
        handle = pynvml.nvmlDeviceGetHandleByIndex(index)
        meminfo = pynvml.nvmlDeviceGetMemoryInfo(handle)
        used= meminfo.used/meminfo.total
        if used<0.3:
            nouse.append(index) 

    if len(nouse)>=need_gpu_count:
        os.environ["CUDA_VISIBLE_DEVICES"] = ','.join(map(str, nouse[:need_gpu_count]))
        # return nouse[:need_gpu_count]
        print(nouse[:need_gpu_count])
        return need_gpu_count
    elif len(nouse)>0:
        os.environ["CUDA_VISIBLE_DEVICES"] = ','.join(map(str, nouse))
        return len(nouse)
    else:
        return 0