docs/report/vpp_performance_tests/impact_spectreandmeltdown/index.rst

   1 Impact of SpectreAndMeltdown Patches
   2 ====================================
   3
   4 Following sections list changes to VPP throughput performance after
   5 applying patches addressing security vulnerabilities referred to as:
   6 Meltdown (Variant3: Rogue Data Cache Load) and Spectre (Variant1: Bounds
   7 Check Bypass; Variant2: Branch Target Injection) security
   8 vulnerabilities. Incremental kernel patches for Ubuntu 16.04 LTS as
   9 documented on
  10 `Ubuntu SpectreAndMeltdown page <https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown>`_.
  11 For Spectre additional Processor microcode and BIOS firmware changes are
  12 applied. Detailed listing of used software versions and patches is
  13 documented in :ref:`test_environment`.
  14
  15 NDR and PDR packet throughput results are compared for 1-core/1-thread,
  16 2-cores/2-threads and 4-cores/4-threads VPP configurations, with
  17 reference performance numbers coming from tests without the Meltdown
  18 patches. Tables show test results grouped into Best 20 changes (minimal
  19 performance impact), followed by Worst 20 changes (maximal performance
  20 impact). All results are also provided in downloadable CSV and pretty
  21 ASCII formats.
  22
  23 NDR Throughput: Best 20 Changes
  24 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25
  26 .. only:: html
  27
  28    .. csv-table::
  29       :align: center
  30       :file: ../../../../_build/_static/vpp/meltdown-spectre-impact-ndr-1t1c-top.csv
  31
  32 .. only:: latex
  33
  34    .. raw:: latex
  35
  36       \makeatletter
  37       \csvset{
  38         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  39       }
  40       \makeatother
  41
  42       {\tiny
  43       \csvautobooklongtable[separator=comma,
  44         respect all,
  45         no check column count,
  46         perfimprovements column width=1cm,
  47         late after line={\\\hline},
  48         late after last line={\end{longtable}}
  49         ]{../_build/_static/vpp/meltdown-spectre-impact-ndr-1t1c-top.csv}
  50       }
  51
  52 NDR Throughput: Worst 20 Changes
  53 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  54
  55 .. only:: html
  56
  57    .. csv-table::
  58       :align: center
  59       :file: ../../../../_build/_static/vpp/meltdown-spectre-impact-ndr-1t1c-bottom.csv
  60
  61 .. only:: latex
  62
  63    .. raw:: latex
  64
  65       \makeatletter
  66       \csvset{
  67         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  68       }
  69       \makeatother
  70
  71       {\tiny
  72       \csvautobooklongtable[separator=comma,
  73         respect all,
  74         no check column count,
  75         perfimprovements column width=1cm,
  76         late after line={\\\hline},
  77         late after last line={\end{longtable}}
  78         ]{../_build/_static/vpp/meltdown-spectre-impact-ndr-1t1c-bottom.csv}
  79       }
  80
  81 .. only:: html
  82
  83       NDR Throughput: All Changes
  84       ~~~~~~~~~~~~~~~~~~~~~~~~~~~
  85
  86       Complete results for all NDR tests are available in a CSV and pretty
  87       ASCII formats:
  88
  89         - `csv format for 1t1c <../../_static/vpp/meltdown-spectre-impact-ndr-1t1c-full.csv>`_,
  90         - `csv format for 2t2c <../../_static/vpp/meltdown-spectre-impact-ndr-2t2c-full.csv>`_,
  91         - `csv format for 4t4c <../../_static/vpp/meltdown-spectre-impact-ndr-4t4c-full.csv>`_,
  92         - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-spectre-impact-ndr-1t1c-full.txt>`_,
  93         - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-spectre-impact-ndr-2t2c-full.txt>`_,
  94         - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-spectre-impact-ndr-4t4c-full.txt>`_.
  95
  96 PDR Throughput: Best 20 Changes
  97 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  98
  99 .. only:: html
 100
 101    .. csv-table::
 102       :align: center
 103       :file: ../../../../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-top.csv
 104
 105 .. only:: latex
 106
 107    .. raw:: latex
 108
 109       \makeatletter
 110       \csvset{
 111         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 112       }
 113       \makeatother
 114
 115       {\tiny
 116       \csvautobooklongtable[separator=comma,
 117         respect all,
 118         no check column count,
 119         perfimprovements column width=1cm,
 120         late after line={\\\hline},
 121         late after last line={\end{longtable}}
 122         ]{../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-top.csv}
 123       }
 124
 125 PDR Throughput: Worst 20 Changes
 126 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 127
 128 .. only:: html
 129
 130    .. csv-table::
 131       :align: center
 132       :file: ../../../../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-bottom.csv
 133
 134 .. only:: latex
 135
 136    .. raw:: latex
 137
 138       \makeatletter
 139       \csvset{
 140         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 141       }
 142       \makeatother
 143
 144       {\tiny
 145       \csvautobooklongtable[separator=comma,
 146         respect all,
 147         no check column count,
 148         perfimprovements column width=1cm,
 149         late after line={\\\hline},
 150         late after last line={\end{longtable}}
 151         ]{../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-bottom.csv}
 152       }
 153
 154 .. only:: html
 155
 156       PDR Throughput: All Changes
 157       ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 158
 159       Complete results for all PDR tests are available in a CSV and pretty
 160       ASCII formats:
 161
 162         - `csv format for 1t1c <../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-full.csv>`_,
 163         - `csv format for 2t2c <../../_static/vpp/meltdown-spectre-impact-pdr-2t2c-full.csv>`_,
 164         - `csv format for 4t4c <../../_static/vpp/meltdown-spectre-impact-pdr-4t4c-full.csv>`_,
 165         - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-full.txt>`_,
 166         - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-spectre-impact-pdr-2t2c-full.txt>`_,
 167         - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-spectre-impact-pdr-4t4c-full.txt>`_.