Release Notes

Changes in CSIT-2206

  1. VPP PERFORMANCE TESTS

    • Reduction of tests: Removed certain test variations executed iteratively for the report (as well as in daily and weekly trending) due to physical testbeds overload.

  2. TEST FRAMEWORK

    • Removed ASTF PPS tests: They provide no real benefit compared to TPUT tests. The ip4base variants renamed to TPUT.

    • Changed TCP TPUT profiles: The previous ones were found to be faulty. The new ones do not use bursts of packets to avoid CSIT-1830 and CSIT-1846.

    • CSIT test environment version has been updated to ver. 10, see Environment Versioning.

    • CSIT PAPI support: Due to issues with PAPI performance, and deprecation of VAT, VPP CLI is used in CSIT for many VPP scale tests. See Known Issues.

    • General Code Housekeeping: Ongoing code optimizations and bug fixes.

  3. PRESENTATION AND ANALYTICS LAYER

    • Graphs improvements: Updated Packet Latency graphs, see Packet Latency.

Known Issues

New

#

JiraID

Issue Description

1

CSIT-1827

3n-icx, 3n-skx: all AVF crypto tests sporadically fail. 1518B with no traffic, IMIX with excessive packet loss.

2

CSIT-1830

All testbeds: All TCP tput (and pps) tests are failing for small packets.

3

CSIT-1832

3n-alt: NDR 1 packet lost on random tests.

4

CSIT-1834

2n-icx, 2n-skx: sporadic AVF soak tests failing to find critical load with PLRsearch.

5

CSIT-1846

2n-skx, 2n-clx, 2n-icx: ALL 1518B TCP tput tests failing with big packet loss.

6

CSIT-1847

2n-skx: all 10vm-1t test failed with half of packets dropped.

7

CSIT-1849

2n-skx: UDP 16m tput tests fail to create all sessions.

Fixed

Issues reported in previous releases which were fixed in this release:

#

JiraID

Issue Description

1

CSIT-1810

DPDK - performance regression with DPDK driver when Max Frame Size is set to less than 2023.

Worse performance with DPDK driver when MTU is set to 2022 or less.

VPP-1876

2

CSIT-1811

All 9000B NAT44DET 64k 1m scale tests fail due to bps rate set to high on TRex.

3

CSIT-1791

Performance regression in RDMA tests, due to CSIT environment changes. Two symptoms: 1. 10-20% regression across most tests. 2. DUT performance cap just below 38 Mpps.

Root Cause Analysis for Performance Changes

List of RCAs in CSIT-2206 for VPP performance changes:

#

JiraID

Issue Description

1

CSIT-1851

trending regression: various icelake tests around 2202-04-15 Somewhat expected consequence of a VPP usability fix, the previous VPP compiler version was too new for the OS used.

2

VPP-2030

regression: ip6base on ICX around 2022-03-23 “Loads blocked due to overlapping with a preceding store that cannot be forwarded.” started happening in ip6-lookup graph node.

3

CSIT-1852

2n-zn2 mellanox performance cap Old issue, only now distinguished from CSIT-1751. This testbed+nic combination is capped below 28 Mpps, cause not identified yet.

4

CSIT-1853

trending regression: nat44ed cps around 2202-04-01 VPP change added more computation to slow path (in order to support multiple VRFs). Not clear if the VPP implementation is optimized enough.