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/***************************************************************************\
|* *|
|* Copyright 2010-2016 NVIDIA Corporation. All rights reserved. *|
|* *|
|* NOTICE TO USER: *|
|* *|
|* This source code is subject to NVIDIA ownership rights under U.S. *|
|* and international Copyright laws. Users and possessors of this *|
|* source code are hereby granted a nonexclusive, royalty-free *|
|* license to use this code in individual and commercial software. *|
|* *|
|* NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THIS SOURCE *|
|* CODE FOR ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR *|
|* IMPLIED WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH *|
|* REGARD TO THIS SOURCE CODE, INCLUDING ALL IMPLIED WARRANTIES OF *|
|* MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR *|
|* PURPOSE. IN NO EVENT SHALL NVIDIA BE LIABLE FOR ANY SPECIAL, *|
|* INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES *|
|* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN *|
|* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING *|
|* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOURCE *|
|* CODE. *|
|* *|
|* U.S. Government End Users. This source code is a "commercial item" *|
|* as that term is defined at 48 C.F.R. 2.101 (OCT 1995), consisting *|
|* of "commercial computer software" and "commercial computer software *|
|* documentation" as such terms are used in 48 C.F.R. 12.212 (SEPT 1995) *|
|* and is provided to the U.S. Government only as a commercial end item. *|
|* Consistent with 48 C.F.R.12.212 and 48 C.F.R. 227.7202-1 through *|
|* 227.7202-4 (JUNE 1995), all U.S. Government End Users acquire the *|
|* source code with only those rights set forth herein. *|
|* *|
|* Any use of this source code in individual and commercial software must *|
|* include, in the user documentation and internal comments to the code, *|
|* the above Disclaimer and U.S. Government End Users Notice. *|
|* *|
|* *|
\***************************************************************************/
#include <stdio.h>
#include <nvml.h>
#include <stdlib.h>
int main(void)
{
nvmlReturn_t result;
unsigned int device_count, i;
// First initialize NVML library
result = nvmlInit();
if (NVML_SUCCESS != result)
{
printf("Failed to initialize NVML: %s\n", nvmlErrorString(result));
return 1;
}
result = nvmlDeviceGetCount(&device_count);
if (NVML_SUCCESS != result)
{
printf("Failed to query device count: %s\n", nvmlErrorString(result));
goto Error;
}
printf("Found %u device%s\n", device_count, device_count != 1 ? "s" : "");
printf("Listing devices:\n");
for (i = 0; i < device_count; i++)
{
nvmlDevice_t device;
char name[NVML_DEVICE_NAME_BUFFER_SIZE];
nvmlPciInfo_t pci;
// Query for device handle to perform operations on a device
// You can also query device handle by other features like:
// nvmlDeviceGetHandleBySerial
// nvmlDeviceGetHandleByPciBusId
result = nvmlDeviceGetHandleByIndex(i, &device);
if (NVML_SUCCESS != result)
{
printf("Failed to get handle for device %u: %s\n", i, nvmlErrorString(result));
goto Error;
}
result = nvmlDeviceGetName(device, name, NVML_DEVICE_NAME_BUFFER_SIZE);
if (NVML_SUCCESS != result)
{
printf("Failed to get name of device %u: %s\n", i, nvmlErrorString(result));
goto Error;
}
// pci.busId is very useful to know which device physically you're talking to
// Using PCI identifier you can also match nvmlDevice handle to CUDA device.
result = nvmlDeviceGetPciInfo(device, &pci);
if (NVML_SUCCESS != result)
{
printf("Failed to get pci info for device %u: %s\n", i, nvmlErrorString(result));
goto Error;
}
printf("%u. %s [%s]\n", i, name, pci.busId);
// This is an example to get the supported vGPUs type names
unsigned int vgpuCount = 0;
nvmlVgpuTypeId_t *vgpuTypeIds = NULL;
unsigned int j;
result = nvmlDeviceGetSupportedVgpus(device, &vgpuCount, NULL);
if (NVML_ERROR_INSUFFICIENT_SIZE != result)
goto Error;
if (vgpuCount != 0)
{
vgpuTypeIds = malloc(sizeof(nvmlVgpuTypeId_t) * vgpuCount);
if (!vgpuTypeIds)
{
printf("Memory allocation of %d bytes failed \n", (int)(sizeof(*vgpuTypeIds)*vgpuCount));
goto Error;
}
result = nvmlDeviceGetSupportedVgpus(device, &vgpuCount, vgpuTypeIds);
if (NVML_SUCCESS != result)
{
printf("Failed to get the supported vGPUs with status %d \n", (int)result);
goto Error;
}
printf(" Displaying vGPU type names: \n");
for (j = 0; j < vgpuCount; j++)
{
char vgpuTypeName[NVML_DEVICE_NAME_BUFFER_SIZE];
unsigned int bufferSize = NVML_DEVICE_NAME_BUFFER_SIZE;
if (NVML_SUCCESS == (result = nvmlVgpuTypeGetName(vgpuTypeIds[j], vgpuTypeName, &bufferSize)))
{
printf(" %s\n",vgpuTypeName);
}
else
{
printf("Failed to query the vGPU type name with status %d \n", (int)result);
}
}
}
if (vgpuTypeIds)
free(vgpuTypeIds);
}
result = nvmlShutdown();
if (NVML_SUCCESS != result)
printf("Failed to shutdown NVML: %s\n", nvmlErrorString(result));
printf("All done.\n");
return 0;
Error:
result = nvmlShutdown();
if (NVML_SUCCESS != result)
printf("Failed to shutdown NVML: %s\n", nvmlErrorString(result));
return 1;
}
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