RCA: Add CSIT-1789 as a known issue
[csit.git] / docs / report / vpp_performance_tests / csit_release_notes.rst
index 54fa73d..72fd0a1 100644 (file)
-CSIT Release Notes\r
-==================\r
-\r
-Changes in CSIT |release|\r
--------------------------\r
-\r
-#. Naming change for all VPP performance test suites and test cases.\r
-#. VPP performance test environment changes\r
-\r
-    - upgrade to Ubuntu 16.04\r
-    - VM and vhost-user test environment optimizations\r
-    - addition of HW cryptodev devices in LFD FD.io physical testbed\r
-\r
-#. Added tests\r
-\r
-    - NICs\r
-\r
-      - Intel x710 (L2 Bridge Domain switched-forwarding, vhost-user)\r
-      - Cisco VIC1385 (L2 Bridge Domain switched-forwarding)\r
-      - Cisco VIC1227 (L2 Bridge Domain switched-forwarding)\r
-\r
-    - vhost-user tests with VM\r
-\r
-      - L2 Bridge Domain switched-forwarding with Intel x710 NIC\r
-      - L2 Bridge Domain switched-forwarding with VxLAN and Intel x520 NIC\r
-      - L2 Bridge Domain switched-forwarding with Intel xl710 NIC\r
-\r
-    - Tests with VxLAN\r
-\r
-      - L2 Bridge Domain switched-forwarding with Intel x520 NIC\r
-      - L2 Bridge Domain switched-forwarding with vhost-user, VM and Intel x520\r
-        NIC\r
-\r
-Performance Improvements\r
-------------------------\r
-\r
-Substantial improvements in measured packet throughput, with relative increase\r
-of double-digit percentage points, have been observed in a number of CSIT\r
-|release| tests listed below. Relative improvements are calculated against the\r
-test results in CSIT rls1609 report.\r
-\r
-NDR Throughput\r
-~~~~~~~~~~~~~~\r
-\r
-Non-Drop Rate Throughput discovery tests:\r
-\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| VPP Functionality | Test Name                                                       | VPP-16.09 | VPP-17.01       | Relative Improvement |\r
-+===================+=================================================================+===========+=================+======================+\r
-| L2XC              | 10ge2p1x520: 64B-1t1c-eth-l2xcbase-ndrdisc                      | 9.4 Mpps  | 12.7 Mpps       | 35%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC              | 10ge2p1xl710: 64B-1t1c-eth-l2xcbase-ndrdisc                     | 9.5 Mpps  | 12.2..12.4 Mpps | 28..30%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC dot1ad       | 10ge2p1x520: 64B-1t1c-dot1ad-l2xcbase-ndrdisc                   | 7.4 Mpps  | 8.8..9.0 Mpps   | 19..23%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC dot1q        | 10ge2p1x520: 64B-1t1c-dot1q-l2xcbase-ndrdisc                    | 7.5 Mpps  | 8.8..9.0 Mpps   | 17..20%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC VxLAN        | 10ge2p1x520: 64B-1t1c-ethip4vxlan-l2xcbase-ndrdisc              | 5.4 Mpps  | 6.5 Mpps        | 20%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC-vhost-VM     | 10ge2p1x520: 64B-1t1c-eth-l2xcbase-eth-2vhost-1vm-ndrdisc       | 0.5 Mpps  | 2.8..3.2 Mpps   | 460..540%            |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2BD              | 10ge2p1x520: 64B-1t1c-eth-l2bdbasemaclrn-ndrdisc                | 7.8 Mpps  | 10.4..10.6 Mpps | 33..36%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2BD-vhost-VM     | 10ge2p1x520: 64B-1t1c-eth-l2bdbasemaclrn-eth-2vhost-1vm-ndrdisc | 0.4 Mpps  | 2.7..2.8 Mpps   | 575..600%            |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4              | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-ndrdisc                    | 8.7 Mpps  | 9.7 Mpps        | 12%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 COP          | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-copwhtlistbase-ndrdisc     | 7.1 Mpps  | 8.3..8.5 Mpps   | 17..20%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 iAcl         | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-iacldstbase-ndrdisc        | 6.9 Mpps  | 7.6..7.8 Mpps   | 10..13%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 vhost        | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-eth-2vhost-1vm-ndrdisc     | 0.3 Mpps  | 2.6 Mpps        | 767%                 |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6              | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-ndrdisc                    | 3.0 Mpps  | 7.3..7.7 Mpps   | 143..157%            |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-\r
-PDR Throughput\r
-~~~~~~~~~~~~~~\r
-\r
-Partial Drop Rate thoughput discovery tests with packet Loss Tolerance of 0.5%:\r
-\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| VPP Functionality | Test Name                                                       | VPP-16.09 | VPP-17.01       | Relative Improvement |\r
-+===================+=================================================================+===========+=================+======================+\r
-| L2XC              | 10ge2p1x520: 64B-1t1c-eth-l2xcbase-pdrdisc                      | 9.4 Mpps  | 12.7..12.9 Mpps | 35..37%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC dot1ad       | 10ge2p1x520: 64B-1t1c-dot1ad-l2xcbase-pdrdisc                   | 7.4 Mpps  | 8.8..9.1 Mpps   | 19..23%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC dot1q        | 10ge2p1x520: 64B-1t1c-dot1q-l2xcbase-pdrdisc                    | 7.5 Mpps  | 8.8..9.0 Mpps   | 17..20%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC VxLAN        | 10ge2p1x520: 64B-1t1c-ethip4vxlan-l2xcbase-pdrdisc              | 5.4 Mpps  | 6.5 Mpps        | 20%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2XC-vhost-VM     | 10ge2p1x520: 64B-1t1c-eth-l2xcbase-eth-2vhost-1vm-pdrdisc       | 2.6 Mpps  | 3.2..3.3 Mpps   | 23..26%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2BD              | 10ge2p1x520: 64B-1t1c-eth-l2bdbasemaclrn-pdrdisc                | 7.8 Mpps  | 10.6 Mpps       | 36%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| L2BD-vhost-VM     | 10ge2p1x520: 64B-1t1c-eth-l2bdbasemaclrn-eth-2vhost-1vm-pdrdisc | 2.1 Mpps  | 2.9 Mpps        | 38%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4              | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-pdrdisc                    | 8.7 Mpps  | 9.7 Mpps        | 11%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 COP          | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-copwhtlistbase-pdrdisc     | 7.1 Mpps  | 8.3..8.5 Mpps   | 17..20%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 vhost        | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-eth-2vhost-1vm-pdrdisc     | 2.0 Mpps  | 2.7 Mpps        | 35%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-\r
-Measured improvements are in line with VPP code optimizations listed in\r
-`VPP-17.01 release notes\r
-<https://docs.fd.io/vpp/17.01/release_notes_1701.html>`_.\r
-\r
-Additionally, vhost-VM performance improvements are due to both VPP code\r
-optimizations as well as due to the FD.io CSIT Linux KVM test environment\r
-optimizations for vhost-VM tests - see section "2.1.7. Methodology: KVM VM\r
-vhost".\r
-\r
-\r
-Other Performance Changes\r
--------------------------\r
-\r
-Other changes in measured packet throughput, with either minor relative\r
-increase or decrease, have been observed in a number of CSIT |release| tests\r
-listed below. Relative changes are calculated against the test results in CSIT\r
-rls1609 report.\r
-\r
-NDR Throughput\r
-~~~~~~~~~~~~~~\r
-\r
-Non-Drop Rate Throughput discovery tests:\r
-\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| VPP Functionality | Test Name                                                       | VPP-16.09 | VPP-17.01       | Relative Change      |\r
-+===================+=================================================================+===========+=================+======================+\r
-| IPv4 FIB 200k     | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale200k-ndrdisc               | 8.5 Mpps  | 9.0 Mpps        | 6%                   |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 FIB 20k      | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale20k-ndrdisc                | 8.5 Mpps  | 9.0..9.2 Mpps   | 6..8%                |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 FIB 2M       | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale2m-ndrdisc                 | 8.5 Mpps  | 7.8..8.1 Mpps   | -8..-5%              |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 Policer      | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-ipolicemarkbase-ndrdisc    | 6.9 Mpps  | 7.4..7.6 Mpps   | 7..10%               |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 LISP         | 10ge2p1x520: 64B-1t1c-ethip4lispip4-ip4base-ndrdisc             | 4.4 Mpps  | 4.8 Mpps        | 9%                   |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 COP          | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-copwhtlistbase-ndrdisc     | 6.1 Mpps  | 6.1..6.5 Mpps   | 0..7%                |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 200k     | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale200k-ndrdisc               | 6.5 Mpps  | 5.3..5.7 Mpps   | -18..-12%            |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 20k      | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale20k-ndrdisc                | 6.9 Mpps  | 6.5 Mpps        | -6%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 2M       | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale2m-ndrdisc                 | 5.3 Mpps  | 4.2 Mpps        | -21%                 |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 iAcl         | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-iacldstbase-ndrdisc        | 6.5 Mpps  | 6.1..6.5 Mpps   | -6..0%               |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-\r
-PDR Throughput\r
-~~~~~~~~~~~~~~\r
-\r
-Partial Drop Rate thoughput discovery tests with packet Loss Tolerance of 0.5%:\r
-\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| VPP Functionality | Test Name                                                       | VPP-16.09 | VPP-17.01       | Relative Change      |\r
-+===================+=================================================================+===========+=================+======================+\r
-| IPv4 FIB 200k     | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale200k-pdrdisc               | 8.5 Mpps  | 9.0 Mpps        | 6%                   |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 FIB 20k      | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale20k-pdrdisc                | 8.5 Mpps  | 9.0..9.2 Mpps   | 6..8%                |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 FIB 2M       | 10ge2p1x520: 64B-1t1c-ethip4-ip4scale2m-pdrdisc                 | 8.3 Mpps  | 8.1 Mpps        | -2%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 iAcl         | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-iacldstbase-pdrdisc        | 7.1 Mpps  | 7.6..7.8 Mpps   | 7..10%               |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 Policer      | 10ge2p1x520: 64B-1t1c-ethip4-ip4base-ipolicemarkbase-pdrdisc    | 7.1 Mpps  | 7.4..7.6 Mpps   | 4..7%                |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv4 LISP         | 10ge2p1x520: 64B-1t1c-ethip4lispip4-ip4base-pdrdisc             | 4.6 Mpps  | 4.8 Mpps        | 9%                   |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6              | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-pdrdisc                    | 7.7 Mpps  | 7.3..7.7 Mpps   | -5..0%               |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 COP          | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-copwhtlistbase-pdrdisc     | 6.1 Mpps  | 6.1..6.5 Mpps   | 0..7%                |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 200k     | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale200k-pdrdisc               | 6.9 Mpps  | 5.3..5.7 Mpps   | -23..-17%            |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 20k      | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale20k-pdrdisc                | 6.9 Mpps  | 6.5 Mpps        | -6%                  |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 FIB 2M       | 10ge2p1x520: 78B-1t1c-ethip6-ip6scale2m-pdrdisc                 | 5.3 Mpps  | 4.2 Mpps        | -21%                 |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-| IPv6 iAcl         | 10ge2p1x520: 78B-1t1c-ethip6-ip6base-iacldstbase-pdrdisc        | 6.5 Mpps  | 6.1..6.5 Mpps   | -6..0%               |\r
-+-------------------+-----------------------------------------------------------------+-----------+-----------------+----------------------+\r
-\r
-Known Issues\r
-------------\r
-\r
-Here is the list of known issues in CSIT |release| for VPP performance tests:\r
-\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| # | Issue                                           | Description                                                     |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| 1 | Sporadic IPv4 routed-forwarding NDR discovery   | Suspected issue with DPDK IPv4 checksum calculation.            |\r
-|   | test failures for 1518B frame size              | Observed frequency: sporadic, ca. 20% to 30% of test runs.      |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| 2 | Vic1385 and Vic1227 NICs jumbo frames test      | Suspected issue with VIC DPDK drivers that do not support jumbo |\r
-|   | failures (9000B)                                | frames (dropped rx-miss). Observed frequency: 100%.             |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| 3 | Vic1385 and Vic1227 performance                 | Low performance of NDR results. Big difference between NDR and  |\r
-|   |                                                 | PDR.                                  .                         |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| 4 | Sporadic NDR discovery test failures on x520    | Suspected issue with HW settings (BIOS, FW) in LF               |\r
-|   |                                                 | infrastructure. Issue can't be replicated outside LF.           |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-| 5 | Non-repeatible zig-zagging NDR throughput       | Suspected NIC driver issue in multi-thread multi-core operation |\r
-|   | results for multi-thread multi-core tests       | affectin NDR throughput. Applies to XL710 and X710 NICs tested. |\r
-|   | - 2t2c, 4t4c - for some tested NICs.            |                                                                 |\r
-+---+-------------------------------------------------+-----------------------------------------------------------------+\r
-\r
-Tests to be Added - Cryptodev\r
------------------------------\r
-\r
-DPDK Cryptodev functionality support for both SW and HW crypto devices has\r
-been introduced in VPP-17.01 release. CSIT functional and performance tests\r
-have been also developed and merged. However due to the factors beyond CSIT\r
-project control execution of those tests within the LF FD.io test environment\r
-still need to complete. Once the results become available, they will be\r
-published as an addendum to the current version of CSIT |release| report.\r
-\r
-Tests to be Added - SNAT44\r
---------------------------\r
-\r
-VPP SNAT44 functionality has been introduced in VPP-17.01 release. CSIT\r
-performance tests are still in development and integration into LFD FD.io test\r
-environment. Once the tests are fully integrated and results become available,\r
-they will be published as an addendum to the current version of CSIT |release|\r
-report.\r
+.. _vpp_performance_tests_release_notes:
+
+Release Notes
+=============
+
+Changes in |csit-release|
+-------------------------
+
+#. VPP PERFORMANCE TESTS
+
+   - **AF_XDP**: Added af_xdp driver support for all test cases. Test
+     results will be added in sub-sequent CSIT-2106 report.
+
+   - **GTPU tunnel**: Added GTPU HW Offload IPv4 routing tests.
+
+   - **Intel Xeon Ice Lake**: Added initial test data for these
+     platforms. Current CSIT-2106 report data for Intel Xeon Ice Lake
+     comes from an external source (Intel labs running CSIT code on
+     "8360Y D Stepping" and "6338N" processors). For details about the
+     physical setup see :ref:`tested_physical_topologies`. Tested
+     VPP and CSIT versions are pre-release, VPP
+     21.06-rc0~779-gd640ae52f.
+
+   - **MLRsearch improvements**: Added support for multiple packet
+     throughput rates in a single search, each rate is associated
+     with a distinct Packet Loss Ratio (PLR) criterion. Previously
+     only Non Drop Rate (NDR) (PLR=0) and single Partial Drop Rate
+     (PDR) (PLR<0.5%) were supported. Implemented number of
+     optimizations improving rate discovery efficiency.
+
+   - **Reduction of tests**: Removed obsolete VPP use cases and
+     superfluous test combinations from continuous and report test
+     executions, including:
+
+     - All vts tests, obsolete use cases.
+     - dot1q tests apart from dot1q-l2bd, superfluous combinations.
+     - -100flows, -100kflows in all acl tests.
+     - nat44 tests
+
+       - -pps tests, replaced by -tput tests.
+       - h1-p1-s1 single session tests, unessential combination.
+       - h4096-p63-s258048 tests, unessential scale combination.
+
+     - ipsec tests
+
+       - ethip4ipsectptlispgpe.
+       - policy-aes128gcm.
+       - policy-aes128cbc-hmac256sha.
+       - policy-aes128cbc-hmac512sha.
+       - int-aes128cbc-hmac256sha.
+       - scale of
+
+         - 400tnlsw.
+         - 5000tnlsw.
+         - 20000tnlsw.
+         - 60000tnlsw.
+
+#. TEST FRAMEWORK
+
+   - **Telemetry retouch**: Refactored telemetry retrieval from DUTs and
+     SUTs. Included VPP perfmon plugin telemetry with all perfmon
+     bundles available in VPP release.
+
+   - **Upgrade to Ubuntu 20.04 LTS**: Re-installed base operating system
+     to Ubuntu 20.04.2 LTS. Upgrade included also baseline Docker
+     containers used for spawning topology.
+
+   - **CSIT test environment** version has been updated to ver. 7, see
+     :ref:`test_environment_versioning`.
+
+   - **CSIT in AWS environment**: Added CSIT support for AWS c5n
+     instances environment. Test results will be added in sub-sequent
+     CSIT-2106 report.
+
+   - **CSIT PAPI support**: Due to issues with PAPI performance, VAT is
+     still used in CSIT for all VPP scale tests. See known issues
+     below.
+
+   - **General Code Housekeeping**: Ongoing code optimizations and bug
+     fixes. 
+
+#. PRESENTATION AND ANALYTICS LAYER
+
+   - **Graphs improvements**: Updated Packet Latency graphs,
+     see :ref:`latency_methodology`.
+
+.. raw:: latex
+
+    \clearpage
+
+.. _vpp_known_issues:
+
+Known Issues
+------------
+
+List of known issues in |csit-release| for VPP performance tests:
+
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+| #  | JiraID                                  | Issue Description                                                                                         |
++====+=========================================+===========================================================================================================+
+|  1 | `CSIT-1782                              | Multicore AVF tests are failing when trying to create interface.                                          |
+|    | <https://jira.fd.io/browse/CSIT-1782>`_ |                                                                                                           |
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+|  2 | `CSIT-1763                              | Adapt ramp-up phase of nat44 tests for different frame sizes.                                             |
+|    | <https://jira.fd.io/browse/CSIT-1763>`_ | Currently ramp-up phase rate and duration values are correctly set for tests with 64B frame size.         |
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+|  3 | `CSIT-1671                              | All CSIT scale tests can not use PAPI due to much slower performance compared to VAT/CLI (it takes much   |
+|    | <https://jira.fd.io/browse/CSIT-1671>`_ | longer to program VPP). This needs to be addressed on the PAPI side.                                      |
+|    +-----------------------------------------+ The usual PAPI library spends too much time parsing arguments, so even with async processing (hundreds of |
+|    | `VPP-1763                               | commands in flight over socket), the VPP configuration for large scale tests (millions of messages) takes |
+|    | <https://jira.fd.io/browse/VPP-1763>`_  | too long.                                                                                                 |
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+|  4 | `CSIT-1789                              | AVF driver does not perform RSS in a deterministic way.                                                   |
+|    | <https://jira.fd.io/browse/CSIT-1789>`_ | This increases standard deviation of tests with small number of flows (mainly ipsec).                     |
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+
+
+Root Cause Analysis for Performance Changes
+-------------------------------------------
+
+List of RCAs in |csit-release| for VPP performance changes:
+
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+
+| #  | JiraID                                  | Issue Description                                                                                         |
++====+=========================================+===========================================================================================================+
+|  1 | `VPP-1972                               | One VPP change has decreased performance of NAT44ed processing, both slow path and fast path.             |
+|    | <https://jira.fd.io/browse/VPP-1972>`_  |                                                                                                           |
++----+-----------------------------------------+-----------------------------------------------------------------------------------------------------------+