bugs for DeviceGetHandleByUUID

[jiaozhentian]

I wrote some code to get the status of the GPU, where get handle by uuid.
But sometimes the code will get the ERROR_NOT_FOUND (6) of the error, it not always happened.
here are my codes:

	if ret != nvml.SUCCESS {
		log.Printf("Failed to initialize NVML: %s\n", nvml.ErrorString(ret))
	}
	defer func() {
		ret := nvml.Shutdown()
		if ret != nvml.SUCCESS {
			log.Printf("Failed to shut down NVML: %s\n", nvml.ErrorString(ret))
		}
	}()
	device, ret := nvml.DeviceGetHandleByUUID(gpu_uuid)
	for ret != nvml.SUCCESS {
		log.Printf("Failed to get device handle: %s\n", nvml.ErrorString(ret))
		ret = nvml.Shutdown()
		time.Sleep(time.Second * 5)
		ret = nvml.Init()
		time.Sleep(time.Second * 1)
		device, ret = nvml.DeviceGetHandleByUUID(gpu_uuid)
	}
	memory, ret := device.GetMemoryInfo()
	if ret != nvml.SUCCESS {
		log.Printf("Failed to get device memory info: %s\n", nvml.ErrorString(ret))
	}

I try to address it by restart the nvml connection service in codes, but it still get that wrong.
However, when the function is over, I do not stop debug, I give it a uuid by gRPC,, DeviceGetHandByUUID can work normally, that is wired.
Anyone help me to fix this bugs?

[jiaozhentian]

I tried to use nvml.DeviceGetHandleBySerial instead nvml.DeviceGetHandleByUUID, it works smoothly, have no idea why the function of uuid went wrong sometimes.

[elezar]

@jiaozhentian it may be that @klueska addressed this in #48. Would you be able to try with the latest version?

[alexbagirov]

Hi. This problem still persists. Do you know any workarounds?