X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=docs%2Freport%2Fvpp_performance_tests%2Foverview.rst;h=4f8fd19388d630285497aba499fb3cc0837492fb;hp=5f85b77b513a90346c1e920d08b33bc7f06916c1;hb=7c3ca2753db85af1b71f4c35bcef4f826f60b5f0;hpb=1261ada9edd22c784a7763d861c5acf87ccd1ae1 diff --git a/docs/report/vpp_performance_tests/overview.rst b/docs/report/vpp_performance_tests/overview.rst index 5f85b77b51..4f8fd19388 100644 --- a/docs/report/vpp_performance_tests/overview.rst +++ b/docs/report/vpp_performance_tests/overview.rst @@ -237,265 +237,3 @@ and system functional tests, introduced in CSIT |release-1|. The naming should be intuitive for majority of the tests. Complete description of CSIT test naming convention is provided on `CSIT test naming wiki `_. - -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. - -Methodology: Packet Throughput ------------------------------- - -Following values are measured and reported for packet throughput tests: - -- NDR binary search per :rfc:`2544`: - - - Packet rate: "RATE: pps - (2x )"; - - Aggregate bandwidth: "BANDWIDTH: Gbps (untagged)"; - -- PDR binary search per :rfc:`2544`: - - - Packet rate: "RATE: pps (2x - )"; - - Aggregate bandwidth: "BANDWIDTH: Gbps (untagged)"; - - Packet loss tolerance: "LOSS_ACCEPTANCE "; - -- NDR and PDR are measured for the following L2 frame sizes: - - - IPv4: 64B, IMIX_v4_1 (28x64B,16x570B,4x1518B), 1518B, 9000B; - - IPv6: 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. - -Methodology: 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. - - -Methodology: KVM VM vhost -------------------------- - -CSIT |release| introduced test environment configuration changes to KVM Qemu -vhost-user tests in order to more representatively measure |vpp-release| -performance in configurations with vhost-user interfaces and different Qemu -settings. - -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 `_. - The purpose is to verify performance impact (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. - -Methodology: LXC and Docker Containers memif --------------------------------------------- - -CSIT |release| introduced additional tests taking advantage of VPP memif virtual -interface (shared memory interface) tests to interconnect VPP instances. VPP -vswitch instance runs in bare-metal user-mode handling Intel x520 NIC 10GbE, -Intel x710 NIC 10GbE, Intel xl710 NIC 40GbE interfaces and connecting over memif -(Slave side) virtual interfaces to more instances of VPP running in -:abbr:`LXC (Linux Container)` or in Docker Containers, both with memif virtual -interfaces (Master side). LXCs and Docker Containers 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 Docker Container setup and control -is available in :ref:`container_orchestration_in_csit`. - -Methodology: Container Topologies Orchestrated by K8s ------------------------------------------------------ - -CSIT |release| introduced new tests of Container topologies connected -over the memif virtual interface (shared memory interface). In order to -provide simple topology coding flexibility and extensibility container -orchestration is done with `Kubernetes `_ -using `Docker `_ images for all container -applications including VPP. `Ligato `_ is -used to address the container networking orchestration that is -integrated with K8s, including memif support. - -For these tests VPP vswitch instance runs in a Docker Container handling -Intel x520 NIC 10GbE, Intel x710 NIC 10GbE interfaces and connecting over memif -virtual interfaces to more instances of VPP running in Docker Containers -with memif virtual interfaces. All Docker Containers 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 Container Topologies Orchestrated by K8s is -available in :ref:`container_orchestration_in_csit`. - -Methodology: 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. - -Methodology: TRex Traffic Generator Usage ------------------------------------------ - -`TRex traffic generator `_ 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 /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. - -Methodology: TCP/IP tests with WRK tool ---------------------------------------- - -`WRK HTTP benchmarking tool `_ 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,A,>Req,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,A,>Req[1],Req[n],F,A.