| # Copyright (c) 2021 The Regents of the University of California |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer; |
| # redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution; |
| # neither the name of the copyright holders nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| from m5.ticks import fromSeconds |
| from m5.util.convert import toLatency, toMemoryBandwidth |
| from m5.objects import PyTrafficGen, Port, BaseTrafficGen |
| |
| from .abstract_core import AbstractCore |
| from .abstract_generator_core import AbstractGeneratorCore |
| |
| from ..utils.override import overrides |
| |
| from typing import Iterator |
| |
| |
| class RandomGeneratorCore(AbstractGeneratorCore): |
| def __init__( |
| self, |
| duration: str, |
| rate: str, |
| block_size: int, |
| min_addr: int, |
| max_addr: int, |
| rd_perc: int, |
| data_limit: int, |
| ) -> None: |
| super(RandomGeneratorCore, self).__init__() |
| """ The random generator core interface. |
| |
| This class defines the interface for a generator core that will create |
| a random traffic specific to the parameters below. This core uses |
| PyTrafficGen to create and inject the synthetic traffic. |
| |
| :param duration: The number of ticks for the generator core to generate |
| traffic. |
| :param rate: The rate at which the synthetic data is read/written. |
| :param block_size: The number of bytes to be read/written with each |
| request. |
| :param min_addr: The lower bound of the address range the generator |
| will read/write from/to. |
| :param max_addr: The upper bound of the address range the generator |
| will read/write from/to. |
| :param rd_perc: The percentage of read requests among all the generated |
| requests. The write percentage would be equal to 100 - rd_perc. |
| :param data_limit: The amount of data in bytes to read/write by the |
| generator before stopping generation. |
| """ |
| self.generator = PyTrafficGen() |
| self._duration = duration |
| self._rate = rate |
| self._block_size = block_size |
| self._min_addr = min_addr |
| self._max_addr = max_addr |
| self._rd_perc = rd_perc |
| self._data_limit = data_limit |
| |
| @overrides(AbstractCore) |
| def connect_dcache(self, port: Port) -> None: |
| self.generator.port = port |
| |
| def _set_traffic(self) -> None: |
| """ |
| This private function will set the traffic to be generated. |
| """ |
| self._traffic = self._create_traffic() |
| |
| def _create_traffic(self) -> Iterator[BaseTrafficGen]: |
| """ |
| A python generator that yields (creates) a random traffic with the |
| specified params in the generator core and then yields (creates) an |
| exit traffic. |
| |
| :rtype: Iterator[BaseTrafficGen] |
| """ |
| duration = fromSeconds(toLatency(self._duration)) |
| rate = toMemoryBandwidth(self._rate) |
| period = fromSeconds(self._block_size / rate) |
| min_period = period |
| max_period = period |
| yield self.generator.createRandom( |
| duration, |
| self._min_addr, |
| self._max_addr, |
| self._block_size, |
| min_period, |
| max_period, |
| self._rd_perc, |
| self._data_limit, |
| ) |
| yield self.generator.createExit(0) |
| |
| def start_traffic(self) -> None: |
| """ |
| A call to this function will start generating the traffic, this call |
| should happen before m5.simulate() and after m5.instantiate(). |
| """ |
| self._set_traffic() |
| self.generator.start(self._traffic) |