-Tested Physical Topologies
---------------------------
-
-CSIT DPDK performance tests are executed on physical baremetal servers hosted
-by :abbr:`LF (Linux Foundation)` FD.io project. Testbed physical topology is
-shown in the figure below.::
-
- +------------------------+ +------------------------+
- | | | |
- | +------------------+ | | +------------------+ |
- | | | | | | | |
- | | <-----------------> | |
- | | DUT1 | | | | DUT2 | |
- | +--^---------------+ | | +---------------^--+ |
- | | | | | |
- | | SUT1 | | SUT2 | |
- +------------------------+ +------------------^-----+
- | |
- | |
- | +-----------+ |
- | | | |
- +------------------> TG <------------------+
- | |
- +-----------+
-
-SUT1 and SUT2 are two System Under Test servers (Cisco UCS C240, each with two
-Intel XEON CPUs), TG is a Traffic Generator (TG, another Cisco UCS C240, with
-two Intel XEON CPUs). SUTs run Testpmd/L3FWD SW SW application in Linux
-user-mode as a Device Under Test (DUT). TG runs TRex SW application as a packet
-Traffic Generator. Physical connectivity between SUTs and to TG is provided
-using different NIC models that need to be tested for performance. Currently
-installed and tested NIC models include:
-
-#. 2port10GE X520-DA2 Intel.
-#. 2port10GE X710 Intel.
-#. 2port10GE VIC1227 Cisco.
-#. 2port40GE VIC1385 Cisco.
-#. 2port40GE XL710 Intel.
-
-From SUT and DUT perspective, all performance tests involve forwarding packets
-between two physical Ethernet ports (10GE or 40GE). Due to the number of
-listed NIC models tested and available PCI slot capacity in SUT servers, in
-all of the above cases both physical ports are located on the same NIC. In
-some test cases this results in measured packet throughput being limited not
-by VPP DUT but by either the physical interface or the NIC capacity.
-
-Going forward CSIT project will be looking to add more hardware into FD.io
-performance labs to address larger scale multi-interface and multi-NIC
-performance testing scenarios.
-
-Note that reported DUT (DPDK) performance results are specific to the SUTs
-tested. Current :abbr:`LF (Linux Foundation)` FD.io SUTs are based on Intel
-XEON E5-2699v3 2.3GHz CPUs. SUTs with other CPUs are likely to yield different
-results. A good rule of thumb, that can be applied to estimate DPDK packet
-thoughput for Phy-to-Phy (NIC-to-NIC, PCI-to-PCI) topology, is to expect
-the forwarding performance to be proportional to CPU core frequency,
-assuming CPU is the only limiting factor and all other SUT parameters
-equivalent to FD.io CSIT environment. The same rule of thumb can be also
-applied for Phy-to-VM/LXC-to-Phy (NIC-to-VM/LXC-to-NIC) topology, but due to
-much higher dependency on intensive memory operations and sensitivity to Linux
-kernel scheduler settings and behaviour, this estimation may not always yield
-good enough accuracy.
-
-For detailed :abbr:`LF (Linux Foundation)` FD.io test bed specification and
-physical topology please refer to `LF FD.io CSIT testbed wiki page
-<https://wiki.fd.io/view/CSIT/CSIT_LF_testbed>`_.
-
-Performance Tests Coverage
---------------------------
-
-Performance tests are split into two main categories: