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diff --git a/docs/requirements/vswitchperf_ltd.rst b/docs/requirements/vswitchperf_ltd.rst index ddd3574b..5464c381 100644 --- a/docs/requirements/vswitchperf_ltd.rst +++ b/docs/requirements/vswitchperf_ltd.rst @@ -935,6 +935,128 @@ Test ID: LTD.Throughput.Overlay.Network.<tech>.RFC2544.PacketLossRatio - CPU and memory utilization may also be collected as part of this test, to determine the vSwitch's performance footprint on the system. +.. 3.2.3.1.15 + +Test ID: LTD.Throughput.RFC2544.MatchAction.PacketLossRatio +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + **Title**: RFC 2544 X% packet loss ratio match action Throughput and Latency Test + + **Prerequisite Test**: LTD.Throughput.RFC2544.PacketLossRatio + + **Priority**: + + **Description**: + + The aim of this test is to determine the cost of carrying out match + action(s) on the DUT’s RFC2544 Throughput with X% traffic loss for + a constant load (fixed length frames at a fixed interval time). + + Each test case requires: + * selection of a specific match action(s), + * specifying a percentage of total traffic that is elligible + for the match action, + * determination of the specific test configuration (number + of flows, number of test ports, presence of an external + controller, etc.), and + * measurement of the RFC 2544 Throughput level with X% packet + loss: Traffic shall be bi-directional and symmetric. + + Note: It would be ideal to verify that all match action-elligible + traffic was forwarded to the correct port, and if forwarded to + an unintended port it should be considered lost. + + A match action is an action that is typically carried on a frame + or packet that matches a set of flow classification parameters + (typically frame/packet header fields). A match action may or may + not modify a packet/frame. Match actions include [1]: + * output : outputs a packet to a particular port. + * normal: Subjects the packet to traditional L2/L3 processing + (MAC learning). + * flood: Outputs the packet on all switch physical ports + other than the port on which it was received and any ports + on which flooding is disabled. + * all: Outputs the packet on all switch physical ports other + than the port on which it was received. + * local: Outputs the packet on the ``local port,'' which + corresponds to the network device that has the same name as + the bridge. + * in_port: Outputs the packet on the port from which it was + received. + * Controller: Sends the packet and its metadata to the + OpenFlow controller as a ``packet in'' message. + * enqueue: Enqueues the packet on the specified queue + within port. + * drop: discard the packet. + + Modifications include [1]: + * mod vlan: covered by LTD.Throughput.RFC2544.PacketLossRatioFrameModification + * mod_dl_src: Sets the source Ethernet address. + * mod_dl_dst: Sets the destination Ethernet address. + * mod_nw_src: Sets the IPv4 source address. + * mod_nw_dst: Sets the IPv4 destination address. + * mod_tp_src: Sets the TCP or UDP or SCTP source port. + * mod_tp_dst: Sets the TCP or UDP or SCTP destination port. + * mod_nw_tos: Sets the DSCP bits in the IPv4 ToS/DSCP or + IPv6 traffic class field. + * mod_nw_ecn: Sets the ECN bits in the appropriate IPv4 or + IPv6 field. + * mod_nw_ttl: Sets the IPv4 TTL or IPv6 hop limit field. + + Note: This comprehensive list requires extensive traffic generator + capabilities. + + The match action(s) that were applied as part of the test should be + reported in the final test report. + + During this test, the DUT must perform the following operations on + the traffic flow: + * Perform packet parsing on the DUT’s ingress port. + * Perform any relevant address look-ups on the DUT’s ingress + ports. + * Carry out one or more of the match actions specified above. + + The default loss percentages to be tested are: - X = 0% - X = 10^-7% + Other values can be tested if required by the user. The selected + frame sizes are those previously defined under Default Test + Parameters. + + The test can also be used to determine the average latency of the + traffic when a match action is applied to packets in a flow. Under + the RFC2544 test methodology, the test duration will include a + number of trials; each trial should run for a minimum period of 60 + seconds. A binary search methodology must be applied for each + trial to obtain the final result. + + **Expected Result:** + + At the end of each trial, the presence or absence of loss + determines the modification of offered load for the next trial, + converging on a maximum rate, or RFC2544Throughput with X% loss. + The Throughput load is re-used in related RFC2544 tests and other + tests. + + **Metrics Collected:** + + The following are the metrics collected for this test: + * The RFC 2544 Throughput in Frames Per Second (FPS) and Mbps + of the DUT for each frame size with X% packet loss. + * The average latency of the traffic flow when passing through + the DUT (if testing for latency, note that this average is + different from the test specified in Section 26.3 ofRFC2544). + * CPU and memory utilization may also be collected as part of + this test, to determine the vSwitch’s performance footprint + on the system. + + The metrics collected can be compared to that of the prerequisite + test to determine the cost of the match action(s) in the pipeline. + + **Deployment scenario**: + + - Physical → virtual switch → physical (and others are possible) + + [1] ovs-ofctl - administer OpenFlow switches + [http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt ] + .. 3.2.2.2 |