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# Copyright (c) 2021 The Regents of the University of California
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#
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# met: redistributions of source code must retain the above copyright
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# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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from .abstract_board import AbstractBoard
from ...resources.resource import AbstractResource
from gem5.utils.simpoint import SimPoint
from m5.objects import SEWorkload, Process
from typing import Optional, List, Union
from m5.util import warn
from pathlib import Path
class SEBinaryWorkload:
"""
This class is used to enable simple Syscall-Execution (SE) mode execution
of a binary.
For this to function correctly the SEBinaryWorkload class should be added
as a superclass to a board (i.e., something that inherits from
AbstractBoard).
**Important Notes:** At present this implementation is limited. A single
process is added to all cores as the workload. Therefore, despite allowing
for multi-core setups, multi-program workloads are not presently supported.
"""
def set_se_binary_workload(
self,
binary: AbstractResource,
exit_on_work_items: bool = True,
stdin_file: Optional[AbstractResource] = None,
stdout_file: Optional[Path] = None,
stderr_file: Optional[Path] = None,
arguments: List[str] = [],
) -> None:
"""Set up the system to run a specific binary.
**Limitations**
* Only supports single threaded applications.
* Dynamically linked executables are partially supported when the host
ISA and the simulated ISA are the same.
:param binary: The resource encapsulating the binary to be run.
:param exit_on_work_items: Whether the simulation should exit on work
items. True by default.
:param stdin_file: The input file for the binary
:param arguments: The input arguments for the binary
"""
# We assume this this is in a multiple-inheritance setup with an
# Abstract board. This function will not work otherwise.
assert isinstance(self, AbstractBoard)
# If we are setting a workload of this type, we need to run as a
# SE-mode simulation.
self._set_fullsystem(False)
binary_path = binary.get_local_path()
self.workload = SEWorkload.init_compatible(binary_path)
process = Process()
process.executable = binary_path
process.cmd = [binary_path] + arguments
if stdin_file is not None:
process.input = stdin_file.get_local_path()
if stdout_file is not None:
process.output = stdout_file.as_posix()
if stderr_file is not None:
process.errout = stderr_file.as_posix()
for core in self.get_processor().get_cores():
core.set_workload(process)
# Set whether to exit on work items for the se_workload
self.exit_on_work_items = exit_on_work_items
def set_se_simpoint_workload(
self,
binary: AbstractResource,
arguments: List[str] = [],
simpoint: Union[AbstractResource, SimPoint] = None,
) -> None:
"""Set up the system to run a SimPoint workload.
**Limitations**
* Only supports single threaded applications.
* Dynamically linked executables are partially supported when the host
ISA and the simulated ISA are the same.
**Warning:** SimPoints only works with one core
:param binary: The resource encapsulating the binary to be run.
:param arguments: The input arguments for the binary
:param simpoint: The SimPoint object or Resource that contains the list of
SimPoints starting instructions, the list of weights, and the SimPoints
interval
"""
# convert input to SimPoint if necessary
if isinstance(simpoint, AbstractResource):
self._simpoint_object = SimPoint(simpoint)
else:
assert isinstance(simpoint, SimPoint)
self._simpoint_object = simpoint
if self.get_processor().get_num_cores() > 1:
warn("SimPoints only works with one core")
self.get_processor().get_cores()[0].set_simpoint(
inst_starts=self._simpoint_object.get_simpoint_start_insts(),
init=True,
)
# Call set_se_binary_workload after SimPoint setup is complete
self.set_se_binary_workload(
binary=binary,
arguments=arguments,
)
def get_simpoint(self) -> SimPoint:
"""
Returns the SimPoint object set. If no SimPoint object has been set an
exception is thrown.
"""
if getattr(self, "_simpoint_object", None):
return self._simpoint_object
raise Exception("This board does not have a simpoint set.")