def convert_rates(l2frame_size, rate, intf_speed):
+ """Convert a given rate unit into the other rate units.
+
+ l2frame_size: size of the L2 frame in bytes or 'IMIX'
+ rate: a dict that has at least one of the following key:
+ 'rate_pps', 'rate_bps', 'rate_percent'
+ with the corresponding input value
+ intf_speed: the line rate speed in bits per second
+ """
avg_packet_size = get_average_packet_size(l2frame_size)
if 'rate_pps' in rate:
+ # input = packets/sec
initial_rate_type = 'rate_pps'
pps = rate['rate_pps']
bps = pps_to_bps(pps, avg_packet_size)
load = bps_to_load(bps, intf_speed)
elif 'rate_bps' in rate:
+ # input = bits per second
initial_rate_type = 'rate_bps'
bps = rate['rate_bps']
load = bps_to_load(bps, intf_speed)
pps = bps_to_pps(bps, avg_packet_size)
elif 'rate_percent' in rate:
+ # input = percentage of the line rate (between 0.0 and 100.0)
initial_rate_type = 'rate_percent'
load = rate['rate_percent']
bps = load_to_bps(load, intf_speed)
return sum([x[0] * x[1] for x in zip(weight, count)]) / sum(weight)
return float('nan')
+def _get_bitmath_rate(rate_bps):
+ rate = rate_bps.replace('ps', '').strip()
+ bitmath_rate = bitmath.parse_string(rate)
+ if bitmath_rate.bits <= 0:
+ raise Exception('%s is out of valid range' % rate_bps)
+ return bitmath_rate
+
def parse_rate_str(rate_str):
if rate_str.endswith('pps'):
rate_pps = rate_str[:-3]
else:
raise Exception('Unknown rate string format %s' % rate_str)
+def get_load_from_rate(rate_str, avg_frame_size=64, line_rate='10Gbps'):
+ '''From any rate string (with unit) return the corresponding load (in % unit)
+
+ :param str rate_str: the rate to convert - must end with a unit (e.g. 1Mpps, 30%, 1Gbps)
+ :param int avg_frame_size: average frame size in bytes (needed only if pps is given)
+ :param str line_rate: line rate ending with bps unit (e.g. 1Mbps, 10Gbps) is the rate that
+ corresponds to 100% rate
+ :return float: the corresponding rate in % of line rate
+ '''
+ rate_dict = parse_rate_str(rate_str)
+ if 'rate_percent' in rate_dict:
+ return float(rate_dict['rate_percent'])
+ lr_bps = _get_bitmath_rate(line_rate).bits
+ if 'rate_bps' in rate_dict:
+ bps = int(rate_dict['rate_bps'])
+ else:
+ # must be rate_pps
+ pps = rate_dict['rate_pps']
+ bps = pps_to_bps(pps, avg_frame_size)
+ return bps_to_load(bps, lr_bps)
def divide_rate(rate, divisor):
if 'rate_pps' in rate:
elif 'rate_percent' in rate:
load = rate['rate_percent']
return '{}%'.format(load)
- else:
- assert False
+ assert False
+ # avert pylint warning
+ return None
def nan_replace(d):