Source code for perfsim.equipments.ram_set
# Copyright (C) 2020 Michel Gokan Khan
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# This file is a part of the PerfSim project, which is now open source and available under the GPLv2.
# Written by Michel Gokan Khan, February 2020
from __future__ import annotations
from typing import TYPE_CHECKING
from perfsim import Resource
if TYPE_CHECKING:
from perfsim import Host
[docs]
class RamSet(Resource):
"""
This class represents a set of RAM modules in a host. A RAM set is a collection of RAM modules that can be used to
store data. It has a capacity and a speed at which it can transfer data.
"""
def __init__(self,
ram_set_id: str,
capacity: float,
speed: float, # in bytes/s (can be determined using sysbench)
host: Host):
super().__init__(type="ram",
name="ram_" + str(ram_set_id),
throttleable=False,
unit_of_measure="bytes",
capacity=capacity * 1024 * 1024 * 8)
self.speed = speed
self.host = host
[docs]
def get_transfer_time_in_ns(self, bytes) -> float:
"""
Get the time it takes to transfer the given number of bytes in nanoseconds.
:param bytes:
:return:
"""
return (bytes * 10 ** 9) / self.speed