from trex_stl_lib import trex_stl_packet_builder_scapy
from trex_stl_lib import trex_stl_streams
+from yardstick.common import constants
from yardstick.network_services.traffic_profile import trex_traffic_profile
streams.extend(_streams)
return trex_stl_streams.STLProfile(streams)
- def _create_imix_data(self, imix):
+ def _create_imix_data(self, imix,
+ weight_mode=constants.DISTRIBUTION_IN_PACKETS):
"""Generate the IMIX distribution for a STL profile
The input information is the framesize dictionary in a test case
E.g.:
imix_count = {64: 25, 128: 75}
+ The weight mode is described in [1]. There are two ways to describe the
+ weight of the packets:
+ - Distribution in packets: the weight defines the percentage of
+ packets sent per packet size. IXIA uses this definition.
+ - Distribution in bytes: the weight defines the percentage of bytes
+ sent per packet size.
+
+ Packet size # packets D. in packets Bytes D. in bytes
+ 40 7 58.33% 280 7%
+ 576 4 33.33% 2304 56%
+ 1500 1 8.33% 1500 37%
+
+ [1] https://en.wikipedia.org/wiki/Internet_Mix
+
:param imix: (dict) IMIX size and weight
"""
imix_count = {}
imix_sum = 100
weight_normalize = float(imix_sum) / 100
- return {size: float(weight) / weight_normalize
- for size, weight in imix_count.items()}
+ imix_dip = {size: float(weight) / weight_normalize
+ for size, weight in imix_count.items()}
+
+ if weight_mode == constants.DISTRIBUTION_IN_BYTES:
+ return imix_dip
+
+ byte_total = sum([int(size) * weight
+ for size, weight in imix_dip.items()])
+ return {size: (int(size) * weight * 100) / byte_total
+ for size, weight in imix_dip.items()}
def _create_vm(self, packet_definition):
"""Create the STL Raw instructions"""