def get_sdram_usage_in_bytes(self, n_neurons, spikes_per_timestep):
if not self.__record:
return ConstantSDRAM(0)
out_spike_bytes = int(math.ceil(n_neurons / 32.0)) * BYTES_PER_WORD
return VariableSDRAM(0, (2 * BYTES_PER_WORD) +
(out_spike_bytes * spikes_per_timestep))
def get_variable_sdram_usage(self, vertex_slice):
"""
:param ~pacman.model.graphs.common.Slice vertex_slice:
:rtype: ~pacman.model.resources.VariableSDRAM
"""
fixed_sdram = 0
per_timestep_sdram = 0
for variable in self.__sampling_rates:
rate = self.__sampling_rates[variable]
fixed_sdram += self._get_fixed_sdram_usage(vertex_slice)
if rate > 0:
fixed_sdram += self._SARK_BLOCK_SIZE
per_record = self.get_buffered_sdram_per_record(
variable, vertex_slice)
if rate == 1:
# Add size for one record as recording every timestep
per_timestep_sdram += per_record
else:
# Get the average cost per timestep
average_per_timestep = per_record / rate
per_timestep_sdram += average_per_timestep
# Add the rest once to fixed for worst case
fixed_sdram += (per_record - average_per_timestep)
for variable in self.__per_timestep_recording:
per_timestep_sdram += self.get_buffered_sdram_per_record(
variable, vertex_slice)
return VariableSDRAM(fixed_sdram, per_timestep_sdram)
def get_sdram_usage_in_bytes(self, n_neurons, spikes_per_timestep):
"""
:rtype: ~pacman.model.resources.AbstractSDRAM
"""
if not self.__record:
return ConstantSDRAM(0)
out_spike_bytes = (int(math.ceil(n_neurons / BITS_PER_WORD)) *
BYTES_PER_WORD)
return VariableSDRAM(0, (2 * BYTES_PER_WORD) +
(out_spike_bytes * spikes_per_timestep))
def get_variable_sdram_usage(self, vertex_slice):
fixed_sdram = 0
per_timestep_sdram = 0
for variable in self.__sampling_rates:
rate = self.__sampling_rates[variable]
fixed_sdram += self._get_fixed_sdram_usage(vertex_slice)
if rate > 0:
fixed_sdram += self.SARK_BLOCK_SIZE
per_record = self.get_buffered_sdram_per_record(
variable, vertex_slice)
if rate == 1:
# Add size for one record as recording every timestep
per_timestep_sdram += per_record
else:
# Get the average cost per timestep
average_per_timestep = per_record / rate
per_timestep_sdram += average_per_timestep
# Add the rest once to fixed for worst case
fixed_sdram += (per_record - average_per_timestep)
return VariableSDRAM(fixed_sdram, per_timestep_sdram)