1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
################################################################################
# BSD LICENSE
#
# Copyright(c) 2019-2023 Intel Corporation. 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 Intel Corporation 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
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
################################################################################
"""
The module defines PqosMba which can be used to read or write Memory Bandwidth
Allocation configuration.
"""
from __future__ import absolute_import, division, print_function
import ctypes
from pqos.capability import PqosCap
from pqos.common import pqos_handle_error
from pqos.native_struct import CPqosMba
from pqos.pqos import Pqos
class PqosMba(object):
"PQoS Memory Bandwidth Allocation"
class COS: # pylint: disable=too-few-public-methods
"MBA class of service configuration"
def __init__(self, class_id, mb_max, ctrl=False, smba=False):
self.class_id = class_id # class of service
self.mb_max = mb_max # maximum available bandwidth
# in percentage (without MBA controller)
# or in MBps (with MBA controller),
# depending on ctrl flag
self.ctrl = ctrl # MBA controller flag
self.smba = smba # SMBA controller flag
def __init__(self):
self.pqos = Pqos()
def set(self, socket, requested):
"""
Sets classes of service defined by requested configuration on a socket.
Parameters:
socket: socket ID
requested: a list of PqosMba.COS objects that define requested MBA
configuration
Returns:
a list of PqosMba.COS object with actual MBA configuration
"""
requested_coses = [CPqosMba.from_cos(req) for req in requested]
num_cos = len(requested_coses)
cos_arr = (CPqosMba * num_cos)(*requested_coses)
actual_arr = (CPqosMba * num_cos)()
ret = self.pqos.lib.pqos_mba_set(socket, num_cos, cos_arr, actual_arr)
pqos_handle_error('pqos_mba_set', ret)
actual = [cos.to_cos(self.COS) for cos in actual_arr]
return actual
def get(self, socket):
"""
Reads MBA configuration for a socket.
Parameters:
socket: socket ID
Returns:
a list of PqosMba.COS object with actual MBA configuration
for a given socket
"""
cap = PqosCap()
max_num_cos = cap.get_mba_cos_num()
num_cos = ctypes.c_uint(0)
cos_arr = (CPqosMba * max_num_cos)()
ret = self.pqos.lib.pqos_mba_get(socket, max_num_cos,
ctypes.byref(num_cos), cos_arr)
pqos_handle_error('pqos_mba_get', ret)
coses = [cos_arr[i].to_cos(self.COS) for i in range(num_cos.value)]
return coses
|
