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Performance Impact of Meltdown Patches
======================================
The following tables present performance impact on VPP after
applying patches addressing Meltdown (Variant3: Rogue Data Cache Load) security
ulnerabilities. Incremental kernel patches are applied for Ubuntu 16.04LTS as
documented on `Ubuntu SpectreAndMeltdown page <https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown>`_.
For detailed listing of used software versions and patches please refer
to :ref:`test_environment`.
NDR and PDR packet throughput results are compared for 1-core/1-thread,
2-cores/2-threads and 4-cores/4-threads VPP configurations, with
reference performance numbers coming from tests without the Meltdown
patches.
NDR throughput: Best 20 changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. only:: html
.. csv-table::
:align: center
:file: meltdown-impact-ndr-1t1c-top.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} 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_impact_meltdown/meltdown-impact-ndr-1t1c-top.csv}
}
NDR throughput: Worst 20 changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. only:: html
.. csv-table::
:align: center
:file: meltdown-impact-ndr-1t1c-bottom.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} 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_impact_meltdown/meltdown-impact-ndr-1t1c-bottom.csv}
}
.. only:: html
NDR throughput: All changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Complete results for all NDR tests are available in a CSV and pretty
ASCII formats:
- `csv format for 1t1c <meltdown-impact-ndr-1t1c-full.csv>`_,
- `csv format for 2t2c <meltdown-impact-ndr-2t2c-full.csv>`_,
- `csv format for 4t4c <meltdown-impact-ndr-4t4c-full.csv>`_,
- `pretty ASCII format for 1t1c <meltdown-impact-ndr-1t1c-full.txt>`_,
- `pretty ASCII format for 2t2c <meltdown-impact-ndr-2t2c-full.txt>`_,
- `pretty ASCII format for 4t4c <meltdown-impact-ndr-4t4c-full.txt>`_.
PDR throughput: Best 20 changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. only:: html
.. csv-table::
:align: center
:file: meltdown-impact-pdr-1t1c-top.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} 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_impact_meltdown/meltdown-impact-pdr-1t1c-top.csv}
}
PDR throughput: Worst 20 changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. only:: html
.. csv-table::
:align: center
:file: meltdown-impact-pdr-1t1c-bottom.csv
.. only:: latex
.. raw:: latex
\makeatletter
\csvset{
perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} 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_impact_meltdown/meltdown-impact-pdr-1t1c-bottom.csv}
}
.. only:: html
PDR throughput: All changes
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Complete results for all PDR tests are available in a CSV and pretty
ASCII formats:
- `csv format for 1t1c <meltdown-impact-pdr-1t1c-full.csv>`_,
- `csv format for 2t2c <meltdown-impact-pdr-2t2c-full.csv>`_,
- `csv format for 4t4c <meltdown-impact-pdr-4t4c-full.csv>`_,
- `pretty ASCII format for 1t1c <meltdown-impact-pdr-1t1c-full.txt>`_,
- `pretty ASCII format for 2t2c <meltdown-impact-pdr-2t2c-full.txt>`_,
- `pretty ASCII format for 4t4c <meltdown-impact-pdr-4t4c-full.txt>`_.
|
