private void GetLatestInternal()
{
if (CompareExchange(ref _dcgmHandle, IntPtr.Zero, IntPtr.Zero) == IntPtr.Zero)
{
throw new InvalidOperationException("Failed operation because " + nameof(Metrics) + " has not been initialized.");
}
ushort[] fieldIds = _gpuMetricsFieldGroup.GetInfo().FieldIds;
var groupInfo = _gpuGroup.GetInfo();
// Update dcgm fields
libdcgm.dcgmUpdateAllFields(_dcgmHandle, 0);
var latest = new List <LatestGpuMetrics>();
fixed(ushort *pFieldIds = fieldIds)
{
foreach (var gpuId in groupInfo.DeviceIds)
{
var gpuMetrics = new LatestGpuMetrics {
DeviceId = gpuId
};
dcgm_field_value_v1 *values = stackalloc dcgm_field_value_v1[fieldIds.Length];
var status = libdcgm.dcgmGetLatestValuesForFields(_dcgmHandle,
(uint)gpuId,
pFieldIds,
(uint)fieldIds.Length,
values);
if (status != dcgm_return.Ok)
{
throw new InvalidOperationException($"Error fetching latest values for watches. {Utils.errorString(status)}.");
}
// Store fetched values in GpuMetrics struct
gpuMetrics.Data = new GpuMetricsData
{
MemoryUtilization = values[0].i64,
GpuUtilization = values[1].i64,
FreeBar1 = values[2].i64,
UsedBar1 = values[3].i64,
FreeFrameBuffer = values[4].i64,
UsedFrameBuffer = values[5].i64,
};
latest.Add(gpuMetrics);
}
}
lock (_syncpoint)
{
_latestMetrics.Clear();
_latestMetrics.AddRange(latest);
}
}
public IList <LatestGpuMetrics> GetLatest()
{
LatestGpuMetrics[] metrics;
lock (_syncpoint)
{
metrics = new LatestGpuMetrics[_latestMetrics.Count];
_latestMetrics.CopyTo(metrics, 0);
}
return(metrics);
}