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: ../../_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: ../../_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
  84 NDR throughput: All changes
  85 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
  86
  87 Complete results for all NDR tests are available in a CSV and pretty
  88 ASCII formats:
  89
  90   - `csv format for 1t1c <../../_static/vpp/meltdown-spectre-impact-ndr-1t1c-full.csv>`_,
  91   - `csv format for 2t2c <../../_static/vpp/meltdown-spectre-impact-ndr-2t2c-full.csv>`_,
  92   - `csv format for 4t4c <../../_static/vpp/meltdown-spectre-impact-ndr-4t4c-full.csv>`_,
  93   - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-spectre-impact-ndr-1t1c-full.txt>`_,
  94   - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-spectre-impact-ndr-2t2c-full.txt>`_,
  95   - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-spectre-impact-ndr-4t4c-full.txt>`_.
  96
  97 PDR throughput: Best 20 changes
  98 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  99
 100 .. only:: html
 101
 102    .. csv-table::
 103       :align: center
 104       :file: ../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-top.csv
 105
 106 .. only:: latex
 107
 108    .. raw:: latex
 109
 110       \makeatletter
 111       \csvset{
 112         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 113       }
 114       \makeatother
 115
 116       {\tiny
 117       \csvautobooklongtable[separator=comma,
 118         respect all,
 119         no check column count,
 120         perfimprovements column width=1cm,
 121         late after line={\\\hline},
 122         late after last line={\end{longtable}}
 123         ]{../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-top.csv}
 124       }
 125
 126 PDR throughput: Worst 20 changes
 127 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 128
 129 .. only:: html
 130
 131    .. csv-table::
 132       :align: center
 133       :file: ../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-bottom.csv
 134
 135 .. only:: latex
 136
 137    .. raw:: latex
 138
 139       \makeatletter
 140       \csvset{
 141         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
 142       }
 143       \makeatother
 144
 145       {\tiny
 146       \csvautobooklongtable[separator=comma,
 147         respect all,
 148         no check column count,
 149         perfimprovements column width=1cm,
 150         late after line={\\\hline},
 151         late after last line={\end{longtable}}
 152         ]{../_build/_static/vpp/meltdown-spectre-impact-pdr-1t1c-bottom.csv}
 153       }
 154
 155 .. only:: html
 156
 157 PDR throughput: All changes
 158 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 159
 160 Complete results for all PDR tests are available in a CSV and pretty
 161 ASCII formats:
 162
 163   - `csv format for 1t1c <../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-full.csv>`_,
 164   - `csv format for 2t2c <../../_static/vpp/meltdown-spectre-impact-pdr-2t2c-full.csv>`_,
 165   - `csv format for 4t4c <../../_static/vpp/meltdown-spectre-impact-pdr-4t4c-full.csv>`_,
 166   - `pretty ASCII format for 1t1c <../../_static/vpp/meltdown-spectre-impact-pdr-1t1c-full.txt>`_,
 167   - `pretty ASCII format for 2t2c <../../_static/vpp/meltdown-spectre-impact-pdr-2t2c-full.txt>`_,
 168   - `pretty ASCII format for 4t4c <../../_static/vpp/meltdown-spectre-impact-pdr-4t4c-full.txt>`_.