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To identify performance changes due to VPP code development between previous
and current VPP release version, both have been tested in CSIT environment of
latest version and compared against each other. All substantial progressions and
regressions have been marked up with RCA analysis. See
:ref:`vpp_throughput_comparisons` and :ref:`vpp_known_issues`.
Physical Testbeds
-----------------
FD.io CSIT performance tests are executed in physical testbeds hosted by
:abbr:`LF (Linux Foundation)` for FD.io project. Two physical testbed
topology types are used:
- **3-Node Topology**: Consisting of two servers acting as SUTs
(Systems Under Test) and one server as TG (Traffic Generator), all
connected in ring topology.
- **2-Node Topology**: Consisting of one server acting as SUTs and one
server as TG both connected in ring topology.
Tested SUT servers are based on a range of processors. More detailed description
is provided in :ref:`tested_physical_topologies`. Tested logical topologies are
described in :ref:`tested_logical_topologies`.
Server Specifications
---------------------
Complete technical specifications of compute servers used in CSIT
physical testbeds are maintained in FD.io CSIT repository:
`FD.io CSIT testbeds - Xeon Cascade Lake`_,
`FD.io CSIT testbeds - Xeon Ice Lake`_,
`FD.io CSIT testbeds - EPYC Zen2`_,
`FD.io CSIT testbeds - Atom Denverton`_,
`FD.io CSIT testbeds - Atom Snowridge`_.
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