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CSIT Release Notes
==================
Changes in CSIT |release|
-------------------------
#. Test environment changes in VPP data plane performance tests:
- Further characterization and optimizations of VPP vhost-user and VM test
methodology and test environment;
- Tests with varying Qemu virtio queue (a.k.a. vring) sizes:
[vr256] default 256 descriptors, [vr1024] 1024 descriptors to
optimize for packet throughput;
- Tests with varying Linux :abbr:`CFS (Completely Fair Scheduler)`
settings: [cfs] default settings, [cfsrr1] :abbr:`CFS (Completely Fair
Scheduler)` RoundRobin(1) policy applied to all data plane threads
handling test packet path including all VPP worker threads and all Qemu
testpmd poll-mode threads;
- Resulting test cases are all combinations with [vr256,vr1024] and
[cfs,cfsrr1] settings;
- For more detail see performance results observations section in
this report;
#. Code updates and optimizations in CSIT performance framework:
- Complete CSIT framework code revision and optimizations as descried
on CSIT wiki page `Design_Optimizations
<https://wiki.fd.io/view/CSIT/Design_Optimizations>`_.
- For more detail see the :ref:`CSIT Framework Design <csit-design>` section
in this report;
#. Changes to CSIT driver for TRex Traffic Generator:
- Complete refactor of TRex CSIT driver;
- Introduction of packet traffic profiles to improve usability and
manageability of traffic profiles for a growing number of test
scenarios.
- Support for packet traffic profiles to test IPv4/IPv6 stateful and
stateless DUT data plane features;
#. Added VPP performance tests
- **Linux Container VPP memif virtual interface tests**
- New VPP Memif virtual interface (shared memory interface) tests
with L2 Bridge-Domain switched-forwarding;
- **Stateful Security Groups**
- New m-thread m-core VPP stateful security-groups tests;
- **MAC-IP binding**
- New MACIP iACL single-thread single-core and m-thread m-core tests;
- Statistical analysis of repeatibility of results;
Performance Improvements
------------------------
Substantial improvements in measured packet throughput have been observed in a
number of CSIT |release| tests listed below, with relative increase of
double-digit percentage points. Relative improvements for this release are
calculated against the test results listed in CSIT |release-1| report. The
comparison is calculated between the mean values based on collected and
archived test results' samples for involved VPP releases. Standard deviation
has been also listed for CSIT |release|. VPP-16.09 and VPP-17.01 numbers are
provided for reference.
NDR Throughput
~~~~~~~~~~~~~~
Non-Drop Rate Throughput discovery tests:
.. only:: html
.. csv-table::
:align: center
:file: performance_improvements/performance_improvements_ndr_top.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{ m{1.5cm} m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
}
\makeatother
{\tiny
\csvautobooklongtable[separator=comma,
respect all,
no check column count,
perfimprovements column width=1cm,
late after line={\\\hline},
late after last line={\end{longtable}}
]{../_tmp/src/vpp_performance_tests/performance_improvements/performance_improvements_ndr_top.csv}
}
PDR Throughput
~~~~~~~~~~~~~~
Partial Drop Rate thoughput discovery tests with packet Loss Tolerance of 0.5%:
.. only:: html
.. csv-table::
:align: center
:file: performance_improvements/performance_improvements_pdr_top.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{ m{1.5cm} m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
}
\makeatother
{\tiny
\csvautobooklongtable[separator=comma,
respect all,
no check column count,
perfimprovements column width=1cm,
late after line={\\\hline},
late after last line={\end{longtable}}
]{../_tmp/src/vpp_performance_tests/performance_improvements/performance_improvements_pdr_top.csv}
}
Measured improvements are in line with VPP code optimizations listed in
`VPP-17.10 release notes
<https://docs.fd.io/vpp/17.10/release_notes_1710.html>`_.
Other Performance Changes
-------------------------
Other changes in measured packet throughput, with either minor relative increase
or decrease, have been observed in a number of CSIT |release| tests listed
below. Relative changes are calculated against the test results listed in CSIT
|release-1| report.
NDR Throughput
~~~~~~~~~~~~~~
Non-Drop Rate Throughput discovery tests:
.. only:: html
.. csv-table::
:align: center
:file: performance_improvements/performance_improvements_ndr_low.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{ m{1.5cm} m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
}
\makeatother
{\tiny
\csvautobooklongtable[separator=comma,
respect all,
no check column count,
perfimprovements column width=1cm,
late after line={\\\hline},
late after last line={\end{longtable}}
]{../_tmp/src/vpp_performance_tests/performance_improvements/performance_improvements_ndr_low.csv}
}
PDR Throughput
~~~~~~~~~~~~~~
Partial Drop Rate thoughput discovery tests with packet Loss Tolerance of 0.5%:
.. only:: html
.. csv-table::
:align: center
:file: performance_improvements/performance_improvements_pdr_low.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{ m{1.5cm} m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
}
\makeatother
{\tiny
\csvautobooklongtable[separator=comma,
respect all,
no check column count,
perfimprovements column width=1cm,
late after line={\\\hline},
late after last line={\end{longtable}}
]{../_tmp/src/vpp_performance_tests/performance_improvements/performance_improvements_pdr_low.csv}
}
Known Issues
------------
Here is the list of known issues in CSIT |release| for VPP performance tests:
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
| # | Issue | Jira ID | Description |
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
| 1 | Vic1385 and Vic1227 low performance. | VPP-664 | Low NDR performance. |
| | | | |
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
| 2 | Sporadic NDR discovery test failures on x520. | CSIT-750 | Suspected issue with HW settings (BIOS, FW) in LF |
| | | | infrastructure. Issue can't be replicated outside LF. |
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
| 3 | VPP in 2t2c setups - large variation | CSIT-568 | Suspected NIC firmware or DPDK driver issue affecting NDR |
| | of discovered NDR throughput values across | | throughput. Applies to XL710 and X710 NICs, x520 NICs are fine. |
| | multiple test runs with xl710 and x710 NICs. | | |
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
| 4 | Lower than expected NDR and PDR throughput with | CSIT-569 | Suspected NIC firmware or DPDK driver issue affecting NDR and |
| | xl710 and x710 NICs, compared to x520 NICs. | | PDR throughput. Applies to XL710 and X710 NICs. |
+---+-------------------------------------------------+------------+-----------------------------------------------------------------+
|
