1 # Copyright 2016 Cisco Systems, Inc. All rights reserved.
3 # Licensed under the Apache License, Version 2.0 (the "License"); you may
4 # not use this file except in compliance with the License. You may obtain
5 # a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 # License for the specific language governing permissions and limitations
17 from nfvbench.utils import multiplier_map
19 imix_avg_l2_size = None
22 def convert_rates(l2frame_size, rate, intf_speed):
23 avg_packet_size = get_average_packet_size(l2frame_size)
24 if 'rate_pps' in rate:
25 initial_rate_type = 'rate_pps'
26 pps = rate['rate_pps']
27 bps = pps_to_bps(pps, avg_packet_size)
28 load = bps_to_load(bps, intf_speed)
29 elif 'rate_bps' in rate:
30 initial_rate_type = 'rate_bps'
31 bps = rate['rate_bps']
32 load = bps_to_load(bps, intf_speed)
33 pps = bps_to_pps(bps, avg_packet_size)
34 elif 'rate_percent' in rate:
35 initial_rate_type = 'rate_percent'
36 load = rate['rate_percent']
37 bps = load_to_bps(load, intf_speed)
38 pps = bps_to_pps(bps, avg_packet_size)
40 raise Exception('Traffic config needs to have a rate type key')
43 'initial_rate_type': initial_rate_type,
50 def get_average_packet_size(l2frame_size):
51 if l2frame_size.upper() == 'IMIX':
52 return imix_avg_l2_size
53 return float(l2frame_size)
56 def load_to_bps(load_percentage, intf_speed):
57 return float(load_percentage) / 100.0 * intf_speed
60 def bps_to_load(bps, intf_speed):
61 return float(bps) / intf_speed * 100.0
64 def bps_to_pps(bps, avg_packet_size):
65 return float(bps) / (avg_packet_size + 20.0) / 8
68 def pps_to_bps(pps, avg_packet_size):
69 return float(pps) * (avg_packet_size + 20.0) * 8
72 def weighted_avg(weight, count):
75 return sum([x[0] * x[1] for x in zip(weight, count)]) / sum(weight)
78 def _get_bitmath_rate(rate_bps):
79 rate = rate_bps.replace('ps', '').strip()
80 bitmath_rate = bitmath.parse_string(rate)
81 if bitmath_rate.bits <= 0:
82 raise Exception('%s is out of valid range' % rate_bps)
85 def parse_rate_str(rate_str):
86 if rate_str.endswith('pps'):
87 rate_pps = rate_str[:-3]
89 raise Exception('%s is missing a numeric value' % rate_str)
91 multiplier = multiplier_map[rate_pps[-1].upper()]
92 rate_pps = rate_pps[:-1]
95 rate_pps = int(rate_pps.strip()) * multiplier
97 raise Exception('%s is out of valid range' % rate_str)
98 return {'rate_pps': str(rate_pps)}
99 elif rate_str.endswith('ps'):
100 rate = rate_str.replace('ps', '').strip()
101 bit_rate = bitmath.parse_string(rate).bits
103 raise Exception('%s is out of valid range' % rate_str)
104 return {'rate_bps': str(int(bit_rate))}
105 elif rate_str.endswith('%'):
106 rate_percent = float(rate_str.replace('%', '').strip())
107 if rate_percent <= 0 or rate_percent > 100.0:
108 raise Exception('%s is out of valid range (must be 1-100%%)' % rate_str)
109 return {'rate_percent': str(rate_percent)}
111 raise Exception('Unknown rate string format %s' % rate_str)
113 def get_load_from_rate(rate_str, avg_frame_size=64, line_rate='10Gbps'):
114 '''From any rate string (with unit) return the corresponding load (in % unit)
116 :param str rate_str: the rate to convert - must end with a unit (e.g. 1Mpps, 30%, 1Gbps)
117 :param int avg_frame_size: average frame size in bytes (needed only if pps is given)
118 :param str line_rate: line rate ending with bps unit (e.g. 1Mbps, 10Gbps) is the rate that
119 corresponds to 100% rate
120 :return float: the corresponding rate in % of line rate
122 rate_dict = parse_rate_str(rate_str)
123 if 'rate_percent' in rate_dict:
124 return float(rate_dict['rate_percent'])
125 lr_bps = _get_bitmath_rate(line_rate).bits
126 if 'rate_bps' in rate_dict:
127 bps = int(rate_dict['rate_bps'])
130 pps = rate_dict['rate_pps']
131 bps = pps_to_bps(pps, avg_frame_size)
132 return bps_to_load(bps, lr_bps)
134 def divide_rate(rate, divisor):
135 if 'rate_pps' in rate:
137 value = int(rate[key])
138 elif 'rate_bps' in rate:
140 value = int(rate[key])
143 value = float(rate[key])
146 rate[key] = str(value) if value else str(1)
150 def to_rate_str(rate):
151 if 'rate_pps' in rate:
152 pps = rate['rate_pps']
153 return '{}pps'.format(pps)
154 elif 'rate_bps' in rate:
155 bps = rate['rate_bps']
156 return '{}bps'.format(bps)
157 elif 'rate_percent' in rate:
158 load = rate['rate_percent']
159 return '{}%'.format(load)
161 # avert pylint warning
166 """Replaces every occurence of 'N/A' with float nan."""
167 for k, v in d.iteritems():
168 if isinstance(v, dict):
175 """Converts MAC address to integer representation."""
176 return int(mac.translate(None, ":.- "), 16)
180 """Converts integer representation of MAC address to hex string."""
181 mac = format(i, 'x').zfill(12)
182 blocks = [mac[x:x + 2] for x in xrange(0, len(mac), 2)]
183 return ':'.join(blocks)