nvmlMemory_v2_t: invalid online API documentation on used and reserved memory

Developer Tools Other Tools System Management and Monitoring (NVML)
1

According to latest online NVML API Reference Guide :: GPU Deployment and Management Documentation (nvidia.com)), the nvmlMemory_v2_t::used amount also includes the nvmlMemory_v2_t::reserved amount.

However, based on my testing, the ‘used’ amount doesn’t include the ‘reserved’ amount. Can someone confirm this too? Thanks.

GPU type: V100-SXM2-32GB
GPU Load: No process is running.
Driver Version: 510.85.02 CUDA Version: 11.6

$ nvidia-smi --query-gpu=memory.total,memory.free,memory.used,memory.reserved --format=csv,noheader
  32768 MiB, 32510 MiB, 0 MiB, 257 MiB

NVML code: (error handling is removed)

void get_used_memory_v2(void *libhandle, unsigned int gpuid, nvmlDevice_t dev_handle)
{
    nvmlMemory_v2_t memoryInfo;
    memoryInfo.version = nvmlMemory_v2;

    *(void**) (&pfn_nvmlDeviceGetMemoryInfo_v2) = dlsym(libhandle, "nvmlDeviceGetMemoryInfo_v2");
    nvmlReturn_t nvmlReturn =  pfn_nvmlDeviceGetMemoryInfo_v2(dev_handle, &memoryInfo);
    float mib = 1024 * 1024.0;
    printf("GPU-%d memory_v2(MiB): total=%d free=%d used=%d reserved=%d\n",
        gpuid,
        int(memoryInfo.total / mib),
        int(memoryInfo.free / mib),
        int(memoryInfo.used / mib),
        int(memoryInfo.reserved / mib));
}
results:
GPU-0 memory_v2(MiB): total=32768 free=32510 used=0 reserved=257
2

This is a documentation error. The Reserved Memory amount has been separated from the Used in nvmlMemory_v2_t.