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 traffic_base import AbstractTrafficGenerator
21 def convert_rates(l2frame_size, rate, intf_speed):
22 avg_packet_size = get_average_packet_size(l2frame_size)
23 if 'rate_pps' in rate:
24 initial_rate_type = 'rate_pps'
25 pps = rate['rate_pps']
26 bps = pps_to_bps(pps, avg_packet_size)
27 load = bps_to_load(bps, intf_speed)
28 elif 'rate_bps' in rate:
29 initial_rate_type = 'rate_bps'
30 bps = rate['rate_bps']
31 load = bps_to_load(bps, intf_speed)
32 pps = bps_to_pps(bps, avg_packet_size)
33 elif 'rate_percent' in rate:
34 initial_rate_type = 'rate_percent'
35 load = rate['rate_percent']
36 bps = load_to_bps(load, intf_speed)
37 pps = bps_to_pps(bps, avg_packet_size)
39 raise Exception('Traffic config needs to have a rate type key')
42 'initial_rate_type': initial_rate_type,
49 def get_average_packet_size(l2frame_size):
50 if l2frame_size.upper() == 'IMIX':
51 return AbstractTrafficGenerator.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):
74 return sum(map(lambda x: x[0] * x[1], zip(weight, count))) / sum(weight)
84 def parse_rate_str(rate_str):
85 if rate_str.endswith('pps'):
86 rate_pps = rate_str[:-3]
88 raise Exception('%s is missing a numeric value' % rate_str)
90 multiplier = multiplier_map[rate_pps[-1].upper()]
91 rate_pps = rate_pps[:-1]
94 rate_pps = int(rate_pps.strip()) * multiplier
96 raise Exception('%s is out of valid range' % rate_str)
97 return {'rate_pps': str(rate_pps)}
98 elif rate_str.endswith('ps'):
99 rate = rate_str.replace('ps', '').strip()
100 bit_rate = bitmath.parse_string(rate).bits
102 raise Exception('%s is out of valid range' % rate_str)
103 return {'rate_bps': str(int(bit_rate))}
104 elif rate_str.endswith('%'):
105 rate_percent = float(rate_str.replace('%', '').strip())
106 if rate_percent <= 0 or rate_percent > 100.0:
107 raise Exception('%s is out of valid range (must be 1-100%%)' % rate_str)
108 return {'rate_percent': str(rate_percent)}
110 raise Exception('Unknown rate string format %s' % rate_str)
113 def divide_rate(rate, divisor):
114 if 'rate_pps' in rate:
116 value = int(rate[key])
117 elif 'rate_bps' in rate:
119 value = int(rate[key])
122 value = float(rate[key])
125 rate[key] = str(value) if value else str(1)
129 def to_rate_str(rate):
130 if 'rate_pps' in rate:
131 pps = rate['rate_pps']
132 return '{}pps'.format(pps)
133 elif 'rate_bps' in rate:
134 bps = rate['rate_bps']
135 return '{}bps'.format(bps)
136 elif 'rate_percent' in rate:
137 load = rate['rate_percent']
138 return '{}%'.format(load)
144 """Replaces every occurence of 'N/A' with float nan."""
145 for k, v in d.iteritems():
146 if isinstance(v, dict):
153 """Converts MAC address to integer representation."""
154 return int(mac.translate(None, ":.- "), 16)
158 """Converts integer representation of MAC address to hex string."""
159 mac = format(i, 'x').zfill(12)
160 blocks = [mac[x:x + 2] for x in xrange(0, len(mac), 2)]
161 return ':'.join(blocks)