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
|
################################################################################
# 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 PqosCatL3 which can be used to read or write L3 CAT
configuration.
"""
from __future__ import absolute_import, division, print_function
import ctypes
from pqos.capability import PqosCap
from pqos.common import pqos_handle_error, COSBase
from pqos.native_struct import CPqosL3Ca
from pqos.pqos import Pqos
class PqosCatL3(object):
"PQoS L3 Cache Allocation Technology"
class COS(COSBase): # pylint: disable=too-few-public-methods
"L3 class of service configuration"
def __init__(self):
self.pqos = Pqos()
def set(self, socket, coses):
"""
Sets class of service on a specified socket.
Parameters:
socket: a socket number
coses: a list of PqosCatL3.COS objects, class of service
configuration
"""
pqos_l3_cas = [CPqosL3Ca.from_cos(cos) for cos in coses]
pqos_l3_ca_arr = (CPqosL3Ca * len(pqos_l3_cas))(*pqos_l3_cas)
ret = self.pqos.lib.pqos_l3ca_set(socket, len(pqos_l3_cas),
pqos_l3_ca_arr)
pqos_handle_error('pqos_l3ca_set', ret)
def get(self, socket):
"""
Reads classes of service from a socket.
Parameters:
socket: a socket number
"""
cap = PqosCap()
cos_num = cap.get_l3ca_cos_num()
l3cas = (CPqosL3Ca * cos_num)()
num_ca = ctypes.c_uint(0)
num_ca_ref = ctypes.byref(num_ca)
ret = self.pqos.lib.pqos_l3ca_get(socket, cos_num, num_ca_ref, l3cas)
pqos_handle_error('pqos_l3ca_get', ret)
coses = [l3ca.to_cos(self.COS) for l3ca in l3cas[:num_ca.value]]
return coses
def get_min_cbm_bits(self):
"""Gets minimum number of bits which must be set in L3 way mask when
updating a class of service."""
min_cbm_bits = ctypes.c_uint(0)
min_cbm_bits_ref = ctypes.byref(min_cbm_bits)
ret = self.pqos.lib.pqos_l3ca_get_min_cbm_bits(min_cbm_bits_ref)
pqos_handle_error('pqos_l3ca_get_min_cbm_bits', ret)
return min_cbm_bits.value
|
