- - **Intel Xeon 2n-skx, 3n-skx and 2n-clx testbeds**: VPP performance
- test data is not included in this report version. This is due to
- the lower performance and behaviour inconsistency of these
- systems following the upgrade of processor microcode packages
- (skx ucode 0x2000064, clx ucode 0x500002c), done as part of
- updating Ubuntu 18.04 LTS kernel version. Tested VPP and DPDK
- applications (L3fwd) are affected. Skx and Clx test data will be
- added in subsequent maintenance report version(s) once the issue
- is resolved. See :ref:`vpp_known_issues`.
+ - **Intel Xeon 2n-skx, 3n-skx testbeds**: VPP performance test data
+ is not included in this report version. This is due to the lower
+ performance and behaviour inconsistency of these systems
+ following the upgrade of processor microcode packages (skx ucode
+ 0x2000064), done as part of updating Ubuntu 18.04 LTS kernel
+ version. Tested VPP and DPDK applications (L3fwd) are affected.
+ Skx test data will be added in subsequent maintenance report
+ version(s) once the issue is resolved. See
+ :ref:`vpp_known_issues`.
+
+ - **Intel Xeon 2n-clx testbeds**: VPP performance test data is now
+ included in this report, after resolving the issue of lower
+ performance and behaviour inconsistency of these systems due to
+ the Linux kernel driven upgrade of processor microcode packages
+ to 0x500002c. The resolution is to use latest SuperMicro BIOS 3.2
+ (for X11DPG-QT motherboards used) that upgrades processor
+ microcode to 0x500002c, AND NOT kernel provided ucode package as
+ it does put system into sub-optimal state. Subset of 2n-clx VPP
+ tests are failing due to clx system behaviour change: i) all ip4
+ tests with xxv710 and avf driver and ii) some cx556a rdma tests.
+ See :ref:`vpp_known_issues`.