docs/report/vpp_performance_tests/impact_meltdown/index.rst

   1 Impact of Meltdown Patches
   2 ==========================
   3
   4 Following sections list changes to VPP throughput performance after applying
   5 patches addressing security vulnerabilities referred to as Meltdown
   6 (Variant3: Rogue Data Cache Load). Incremental kernel patches are
   7 applied for Ubuntu 16.04LTS as documented on
   8 `Ubuntu SpectreAndMeltdown page <https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown>`_.
   9 Detailed listing of used software versions and patches is documented in
  10 :ref:`test_environment`.
  11
  12 NDR and PDR packet throughput results are compared for 1-core/1-thread,
  13 2-cores/2-threads and 4-cores/4-threads VPP configurations, with
  14 reference performance numbers coming from tests without the Meltdown
  15 patches. Tables show test results grouped into Best 20 changes (minimal
  16 performance impact), followed by Worst 20 changes (maximal performance
  17 impact). All results are also provided in downloadable CSV and pretty
  18 ASCII formats.
  19
  20 NDR Throughput: Best 20 Changes
  21 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  22
  23 .. only:: html
  24
  25    .. csv-table::
  26       :align: center
  27       :file: ../../../../_build/_static/vpp/meltdown-impact-ndr-1t1c-top.csv
  28
  29 .. only:: latex
  30
  31    .. raw:: latex
  32
  33       \makeatletter
  34       \csvset{
  35         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  36       }
  37       \makeatother
  38
  39       {\tiny
  40       \csvautobooklongtable[separator=comma,
  41         respect all,
  42         no check column count,
  43         perfimprovements column width=1cm,
  44         late after line={\\\hline},
  45         late after last line={\end{longtable}}
  46         ]{../_build/_static/vpp/meltdown-impact-ndr-1t1c-top.csv}
  47       }
  48
  49 NDR Throughput: Worst 20 Changes
  50 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  51
  52 .. only:: html
  53
  54    .. csv-table::
  55       :align: center
  56       :file: ../../../../_build/_static/vpp/meltdown-impact-ndr-1t1c-bottom.csv
  57
  58 .. only:: latex
  59
  60    .. raw:: latex
  61
  62       \makeatletter
  63       \csvset{
  64         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  65       }
  66       \makeatother
  67
  68       {\tiny
  69       \csvautobooklongtable[separator=comma,
  70         respect all,
  71         no check column count,
  72         perfimprovements column width=1cm,
  73         late after line={\\\hline},
  74         late after last line={\end{longtable}}
  75         ]{../_build/_static/vpp/meltdown-impact-ndr-1t1c-bottom.csv}
  76       }
  77
  78 .. only:: html
  79
  80       NDR Throughput: All Changes
  81       ~~~~~~~~~~~~~~~~~~~~~~~~~~~
  82
  83       Complete results for all NDR tests are available in a CSV and pretty
  84       ASCII formats:
  85
  86         - `csv format for 1t1c <../../_static/vpp/meltdown-impact-ndr-1t1c-full.csv>`_,
  87         - `csv format for 2t2c <../../_static/vpp/meltdown-impact-ndr-2t2c-full.csv>`_,
  88         - `csv format for 4t4c <../../_static/vpp/meltdown-impact-ndr-4t4c-full.csv>`_,
  89         - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-impact-ndr-1t1c-full.txt>`_,
  90         - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-impact-ndr-2t2c-full.txt>`_,
  91         - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-impact-ndr-4t4c-full.txt>`_.
  92
  93 PDR Throughput: Best 20 Changes
  94 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  95
  96 .. only:: html
  97
  98    .. csv-table::
  99       :align: center
 100       :file: ../../../../_build/_static/vpp/meltdown-impact-pdr-1t1c-top.csv
 101
 102 .. only:: latex
 103
 104    .. raw:: latex
 105
 106       \makeatletter
 107       \csvset{
 108         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 109       }
 110       \makeatother
 111
 112       {\tiny
 113       \csvautobooklongtable[separator=comma,
 114         respect all,
 115         no check column count,
 116         perfimprovements column width=1cm,
 117         late after line={\\\hline},
 118         late after last line={\end{longtable}}
 119         ]{../_build/_static/vpp/meltdown-impact-pdr-1t1c-top.csv}
 120       }
 121
 122 PDR Throughput: Worst 20 Changes
 123 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 124
 125 .. only:: html
 126
 127    .. csv-table::
 128       :align: center
 129       :file: ../../../../_build/_static/vpp/meltdown-impact-pdr-1t1c-bottom.csv
 130
 131 .. only:: latex
 132
 133    .. raw:: latex
 134
 135       \makeatletter
 136       \csvset{
 137         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 138       }
 139       \makeatother
 140
 141       {\tiny
 142       \csvautobooklongtable[separator=comma,
 143         respect all,
 144         no check column count,
 145         perfimprovements column width=1cm,
 146         late after line={\\\hline},
 147         late after last line={\end{longtable}}
 148         ]{../_build/_static/vpp/meltdown-impact-pdr-1t1c-bottom.csv}
 149       }
 150
 151 .. only:: html
 152
 153 PDR Throughput: All Changes
 154 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 155
 156       Complete results for all PDR tests are available in a CSV and pretty
 157       ASCII formats:
 158
 159         - `csv format for 1t1c <../../_static/vpp/meltdown-impact-pdr-1t1c-full.csv>`_,
 160         - `csv format for 2t2c <../../_static/vpp/meltdown-impact-pdr-2t2c-full.csv>`_,
 161         - `csv format for 4t4c <../../_static/vpp/meltdown-impact-pdr-4t4c-full.csv>`_,
 162         - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-impact-pdr-1t1c-full.txt>`_,
 163         - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-impact-pdr-2t2c-full.txt>`_,
 164         - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-impact-pdr-4t4c-full.txt>`_.