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diff --git a/docs/report/vpp_performance_tests/methodology.rst b/docs/report/vpp_performance_tests/methodology.rst deleted file mode 100644 index 1de3fa4217..0000000000 --- a/docs/report/vpp_performance_tests/methodology.rst +++ /dev/null @@ -1,293 +0,0 @@ -Test Methodology -================ - -Multi-Core and Multi-Threading ------------------------------- - -**Intel Hyper-Threading** - CSIT |release| performance tests are executed with -SUT servers' Intel XEON processors configured in Intel Hyper-Threading Disabled -mode (BIOS setting). This is the simplest configuration used to establish -baseline single-thread single-core application packet processing and forwarding -performance. Subsequent releases of CSIT will add performance tests with Intel -Hyper-Threading Enabled (requires BIOS settings change and hard reboot of -server). - -**Multi-core Tests** - CSIT |release| multi-core tests are executed in the -following VPP thread and core configurations: - -#. 1t1c - 1 VPP worker thread on 1 CPU physical core. -#. 2t2c - 2 VPP worker threads on 2 CPU physical cores. -#. 4t4c - 4 VPP worker threads on 4 CPU physical cores. - -VPP worker threads are the data plane threads. VPP control thread is -running on a separate non-isolated core together with other Linux -processes. Note that in quite a few test cases running VPP workers on 2 -or 4 physical cores hits the I/O bandwidth or packets-per-second limit -of tested NIC. - -Section :ref:`throughput_speedup_multi_core` includes a set of graphs -illustrating packet throughout speedup when running VPP on multiple -cores. - -Packet Throughput ------------------ - -Following values are measured and reported for packet throughput tests: - -- NDR binary search per :rfc:`2544`: - - - Packet rate: "RATE: <aggregate packet rate in packets-per-second> pps - (2x <per direction packets-per-second>)"; - - Aggregate bandwidth: "BANDWIDTH: <aggregate bandwidth in Gigabits per - second> Gbps (untagged)"; - -- PDR binary search per :rfc:`2544`: - - - Packet rate: "RATE: <aggregate packet rate in packets-per-second> pps (2x - <per direction packets-per-second>)"; - - Aggregate bandwidth: "BANDWIDTH: <aggregate bandwidth in Gigabits per - second> Gbps (untagged)"; - - Packet loss tolerance: "LOSS_ACCEPTANCE <accepted percentage of packets - lost at PDR rate>"; - -- NDR and PDR are measured for the following L2 frame sizes (untagged - Ethernet): - - - IPv4 payload: 64B, IMIX_v4_1 (28x64B,16x570B,4x1518B), 1518B, 9000B; - - IPv6 payload: 78B, 1518B, 9000B; - -- NDR and PDR binary search resolution is determined by the final value of the - rate change, referred to as the final step: - - - The final step is set to 50kpps for all NIC to NIC tests and all L2 - frame sizes except 9000B (changed from 100kpps used in previous - releases). - - - The final step is set to 10kpps for all remaining tests, including 9000B - and all vhost VM and memif Container tests. - -All rates are reported from external Traffic Generator perspective. - -Maximum Receive Rate (MRR) --------------------------- - -MRR tests measure the packet forwarding rate under the maximum -load offered by traffic generator over a set trial duration, -regardless of packet loss. Maximum load for specified Ethernet frame -size is set to the bi-directional link rate. - -Current parameters for MRR tests: - -- Ethernet frame sizes: 64B (78B for IPv6 tests) for all tests, IMIX for - selected tests (vhost, memif); all quoted sizes include frame CRC, but - exclude per frame transmission overhead of 20B (preamble, inter frame - gap). - -- Maximum load offered: 10GE and 40GE link (sub-)rates depending on NIC - tested, with the actual packet rate depending on frame size, - transmission overhead and traffic generator NIC forwarding capacity. - - - For 10GE NICs the maximum packet rate load is 2* 14.88 Mpps for 64B, - a 10GE bi-directional link rate. - - For 40GE NICs the maximum packet rate load is 2* 18.75 Mpps for 64B, - a 40GE bi-directional link sub-rate limited by TG 40GE NIC used, - XL710. - -- Trial duration: 10sec. - -Similarly to NDR/PDR throughput tests, MRR test should be reporting bi- -directional link rate (or NIC rate, if lower) if tested VPP -configuration can handle the packet rate higher than bi-directional link -rate, e.g. large packet tests and/or multi-core tests. - -MRR tests are used for continuous performance trending and for -comparison between releases. - -Packet Latency --------------- - -TRex Traffic Generator (TG) is used for measuring latency of VPP DUTs. Reported -latency values are measured using following methodology: - -- Latency tests are performed at 10%, 50% of discovered NDR rate (non drop rate) - for each NDR throughput test and packet size (except IMIX). -- TG sends dedicated latency streams, one per direction, each at the rate of - 10kpps at the prescribed packet size; these are sent in addition to the main - load streams. -- TG reports min/avg/max latency values per stream direction, hence two sets - of latency values are reported per test case; future release of TRex is - expected to report latency percentiles. -- Reported latency values are aggregate across two SUTs due to three node - topology used for all performance tests; for per SUT latency, reported value - should be divided by two. -- 1usec is the measurement accuracy advertised by TRex TG for the setup used in - FD.io labs used by CSIT project. -- TRex setup introduces an always-on error of about 2*2usec per latency flow - - additonal Tx/Rx interface latency induced by TRex SW writing and reading - packet timestamps on CPU cores without HW acceleration on NICs closer to the - interface line. - -vhostuser with KVM VMs ----------------------- - -FD.io CSIT performance lab is testing VPP vhost with KVM VMs using following -environment settings: - -- Tests with varying Qemu virtio queue (a.k.a. vring) sizes: [vr256] default 256 - descriptors, [vr1024] 1024 descriptors to optimize for packet throughput. - -- Tests with varying Linux :abbr:`CFS (Completely Fair Scheduler)` settings: - [cfs] default settings, [cfsrr1] CFS RoundRobin(1) policy applied to all data - plane threads handling test packet path including all VPP worker threads and - all Qemu testpmd poll-mode threads. - -- Resulting test cases are all combinations with [vr256,vr1024] and - [cfs,cfsrr1] settings. - -- Adjusted Linux kernel :abbr:`CFS (Completely Fair Scheduler)` scheduler policy - for data plane threads used in CSIT is documented in - `CSIT Performance Environment Tuning wiki <https://wiki.fd.io/view/CSIT/csit-perf-env-tuning-ubuntu1604>`_. - The purpose is to verify performance impact (MRR and NDR/PDR - throughput) and same test measurements repeatability, by making VPP - and VM data plane threads less susceptible to other Linux OS system - tasks hijacking CPU cores running those data plane threads. - -Memif with LXC and Docker Containers ------------------------------------- - -CSIT |release| includes tests taking advantage of VPP memif virtual -interface (shared memory interface) to interconnect VPP running in -Containers. VPP vswitch instance runs in bare-metal user-mode handling -NIC interfaces and connecting over memif (Slave side) to VPPs running in -:abbr:`Linux Container (LXC)` or in Docker Container (DRC) configured -with memif (Master side). LXCs and DRCs run in a priviliged mode with -VPP data plane worker threads pinned to dedicated physical CPU cores per -usual CSIT practice. All VPP instances run the same version of software. -This test topology is equivalent to existing tests with vhost-user and -VMs as described earlier in :ref:`tested_physical_topologies`. - -More information about CSIT LXC and DRC setup and control is available -in :ref:`container_orchestration_in_csit`. - -Memif with K8s Pods/Containers ------------------------------- - -CSIT |release| includes tests of VPP topologies running in K8s -orchestrated Pods/Containers and connected over memif virtual -interfaces. In order to provide simple topology coding flexibility and -extensibility container orchestration is done with `Kubernetes -<https://github.com/kubernetes>`_ using `Docker -<https://github.com/docker>`_ images for all container applications -including VPP. `Ligato <https://github.com/ligato>`_ is used for the -Pod/Container networking orchestration that is integrated with K8s, -including memif support. - -In these tests VPP vswitch runs in a K8s Pod with Docker Container (DRC) -handling NIC interfaces and connecting over memif to more instances of -VPP running in Pods/DRCs. All DRCs run in a priviliged mode with VPP -data plane worker threads pinned to dedicated physical CPU cores per -usual CSIT practice. All VPP instances run the same version of software. -This test topology is equivalent to existing tests with vhost-user and -VMs as described earlier in :ref:`tested_physical_topologies`. - -Further documentation is available in -:ref:`container_orchestration_in_csit`. - -IPSec with Intel QAT HW cards ------------------------------ - -VPP IPSec performance tests are using DPDK cryptodev device driver in -combination with HW cryptodev devices - Intel QAT 8950 50G - present in -LF FD.io physical testbeds. DPDK cryptodev can be used for all IPSec -data plane functions supported by VPP. - -Currently CSIT |release| implements following IPSec test cases: - -- AES-GCM, CBC-SHA1 ciphers, in combination with IPv4 routed-forwarding - with Intel xl710 NIC. -- CBC-SHA1 ciphers, in combination with LISP-GPE overlay tunneling for - IPv4-over-IPv4 with Intel xl710 NIC. - -TRex Traffic Generator Usage ----------------------------- - -`TRex traffic generator <https://wiki.fd.io/view/TRex>`_ is used for all -CSIT performance tests. TRex stateless mode is used to measure NDR and PDR -throughputs using binary search (NDR and PDR discovery tests) and for quick -checks of DUT performance against the reference NDRs (NDR check tests) for -specific configuration. - -TRex is installed and run on the TG compute node. The typical procedure is: - -- If the TRex is not already installed on TG, it is installed in the - suite setup phase - see `TRex intallation`_. -- TRex configuration is set in its configuration file - :: - - /etc/trex_cfg.yaml - -- TRex is started in the background mode - :: - - $ sh -c 'cd <t-rex-install-dir>/scripts/ && sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /tmp/trex.log 2>&1 &' > /dev/null - -- There are traffic streams dynamically prepared for each test, based on traffic - profiles. The traffic is sent and the statistics obtained using - :command:`trex_stl_lib.api.STLClient`. - -**Measuring packet loss** - -- Create an instance of STLClient -- Connect to the client -- Add all streams -- Clear statistics -- Send the traffic for defined time -- Get the statistics - -If there is a warm-up phase required, the traffic is sent also before test and -the statistics are ignored. - -**Measuring latency** - -If measurement of latency is requested, two more packet streams are created (one -for each direction) with TRex flow_stats parameter set to STLFlowLatencyStats. In -that case, returned statistics will also include min/avg/max latency values. - -TCP/IP tests with WRK tool --------------------------- - -`WRK HTTP benchmarking tool <https://github.com/wg/wrk>`_ is used for -experimental TCP/IP and HTTP tests of VPP TCP/IP stack and built-in -static HTTP server. WRK has been chosen as it is capable of generating -significant TCP/IP and HTTP loads by scaling number of threads across -multi-core processors. - -This in turn enables quite high scale benchmarking of the main TCP/IP -and HTTP service including HTTP TCP/IP Connections-Per-Second (CPS), -HTTP Requests-Per-Second and HTTP Bandwidth Throughput. - -The initial tests are designed as follows: - -- HTTP and TCP/IP Connections-Per-Second (CPS) - - - WRK configured to use 8 threads across 8 cores, 1 thread per core. - - Maximum of 50 concurrent connections across all WRK threads. - - Timeout for server responses set to 5 seconds. - - Test duration is 30 seconds. - - Expected HTTP test sequence: - - - Single HTTP GET Request sent per open connection. - - Connection close after valid HTTP reply. - - Resulting flow sequence - 8 packets: >S,<S-A,>A,>Req,<Rep,>F,<F,> A. - -- HTTP Requests-Per-Second - - - WRK configured to use 8 threads across 8 cores, 1 thread per core. - - Maximum of 50 concurrent connections across all WRK threads. - - Timeout for server responses set to 5 seconds. - - Test duration is 30 seconds. - - Expected HTTP test sequence: - - - Multiple HTTP GET Requests sent in sequence per open connection. - - Connection close after set test duration time. - - Resulting flow sequence: >S,<S-A,>A,>Req[1],<Rep[1],..,>Req[n],<Rep[n],>F,<F,>A. |