DualBankUpdateScenario
Reliability scenarios · Implementation: mlsysim/engine/scenario_definitions/reliability.py.
Construct this scenario with keyword inputs. The fields below show the types and defaults declared by this class.
An over-the-air update that keeps a second flash bank: two copies of model at bytes_per_param in the flash of device.
Notes
Equation: Required flash is twice the selected model-byte footprint; utilization divides this by registered flash capacity.
Assumptions: Two full model banks coexist during an update and the device exposes flash capacity.
Excludes: Firmware, filesystem, bootloader, rollback metadata, and flash alignment reserves.
References
Derivation: Required flash is twice the selected model-byte footprint; utilization divides this by registered flash capacity. This is declared scenario accounting rather than a fitted empirical law.
Examples
>>> from mlsysim import Scenarios
>>> scenario = Scenarios.KeywordSpotterDualBankEsp32S3
>>> value = scenario.bank_bytes
>>> str(value.units)
'B'Attributes
| Name | Description |
|---|---|
| bank_bytes | Model bytes in one update bank at the selected parameter precision. |
| banks_bytes | Storage for two simultaneous model banks, in bytes. |
| bytes_per_param | |
| device | |
| flash | Registered device flash capacity, with no inferred reserve. |
| flash_share | Two-bank footprint divided by registered flash capacity, dimensionless. |
| model |
model
Type: Any.
Declared default: required.
device
Type: HardwareNode.
Declared default: required.
bytes_per_param
Type: Quantity.
Declared default: required.
bank_bytes
engine.scenario_types.DualBankUpdateScenario.bank_bytes
Model bytes in one update bank at the selected parameter precision.
Equation: model.size_in_bytes(bytes_per_param).
banks_bytes
engine.scenario_types.DualBankUpdateScenario.banks_bytes
Storage for two simultaneous model banks, in bytes.
Equation: 2 * bank_bytes.
flash
engine.scenario_types.DualBankUpdateScenario.flash
Registered device flash capacity, with no inferred reserve.
Equation: device.memory.flash_capacity.