def _WatchFieldGroup(self):
"""
Initiate the host engine watch on the fields
"""
ret = dcgm_agent.dcgmWatchFields(self._handle, self._groupId,
self._fieldGroup.fieldGroupId,
self._updateFreq, self._maxKeepAge,
self._maxKeepSamples)
# Will throw exception on error
dcgm_structs._dcgmCheckReturn(ret)
# Force an update of the fields so that we can fetch initial values
ret = dcgm_agent.dcgmUpdateAllFields(self._handle, 1)
# Will throw exception on error
dcgm_structs._dcgmCheckReturn(ret)
# initial update will fetch from startTimestamp
self.GetMore()
def GetMore(self):
"""
Method to cause more field values to be retrieved from DCGM. Returns
the number of field values that were retrieved
"""
beforeCount = self._numValuesSeen
# If we're in manual mode, force an update
if self._oprationMode == dcgm_structs.DCGM_OPERATION_MODE_MANUAL:
ret = dcgm_agent.dcgmUpdateAllFields(self._handle, 1)
# Will throw exception on error
dcgm_structs._dcgmCheckReturn(ret)
self._nextSinceTimestamp = dcgm_agent.dcgmGetValuesSince_v2(
self._handle, self._groupId, self._fieldGroup.fieldGroupId,
self._nextSinceTimestamp,
helper_dcgm_field_values_since_entity_callback, self)
afterCount = self._numValuesSeen
return afterCount - beforeCount