docs/report/vpp_performance_tests/performance_impact_spectre/index.rst

   1 Performance Impact of Meltdown and Spectre Patches
   2 ==================================================
   3
   4 The following tables present performance impact on VPP after applying
   5 patches addressing Meltdown (Variant3: Rogue Data Cache Load) and
   6 Spectre (Variant1: Bounds Check Bypass; Variant2: Branch Target
   7 Injection) security vulnerabilities. Incremental kernel patches for
   8 Ubuntu 16.04 LTS as documented on
   9 `Ubuntu SpectreAndMeltdown page <https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown>`_.
  10 For Spectre additional Processor microcode and BIOS firmware changes are
  11 applied. For detailed listing of used software versions and patches
  12 please refer to :ref:`test_environment`.
  13
  14 NDR and PDR packet throughput results are compared for 1-core/1-thread,
  15 2-cores/2-threads and 4-cores/4-threads VPP configurations, with
  16 reference performance numbers coming from tests without the Meltdown and
  17 Spectre patches.
  18
  19 NDR throughput: Best 20 changes
  20 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  21
  22 .. only:: html
  23
  24    .. csv-table::
  25       :align: center
  26       :file: meltdown-spectre-impact-ndr-1t1c-top.csv
  27
  28 .. only:: latex
  29
  30    .. raw:: latex
  31
  32       \makeatletter
  33       \csvset{
  34         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  35       }
  36       \makeatother
  37
  38       {\tiny
  39       \csvautobooklongtable[separator=comma,
  40         respect all,
  41         no check column count,
  42         perfimprovements column width=1cm,
  43         late after line={\\\hline},
  44         late after last line={\end{longtable}}
  45         ]{../_tmp/src/vpp_performance_tests/performance_impact_spectre/meltdown-spectre-impact-ndr-1t1c-top.csv}
  46       }
  47
  48 NDR throughput: Worst 20 changes
  49 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  50
  51 .. only:: html
  52
  53    .. csv-table::
  54       :align: center
  55       :file: meltdown-spectre-impact-ndr-1t1c-bottom.csv
  56
  57 .. only:: latex
  58
  59    .. raw:: latex
  60
  61       \makeatletter
  62       \csvset{
  63         perfimprovements column width/.style={after head=\csv@pretable\begin{longtable}{m{4cm} m{#1} m{#1} m{#1} m{#1} m{#1}}\csv@tablehead},
  64       }
  65       \makeatother
  66
  67       {\tiny
  68       \csvautobooklongtable[separator=comma,
  69         respect all,
  70         no check column count,
  71         perfimprovements column width=1cm,
  72         late after line={\\\hline},
  73         late after last line={\end{longtable}}
  74         ]{../_tmp/src/vpp_performance_tests/performance_impact_spectre/meltdown-spectre-impact-ndr-1t1c-bottom.csv}
  75       }
  76
  77 .. only:: html
  78
  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 <meltdown-spectre-impact-ndr-1t1c-full.csv>`_,
  87   - `csv format for 2t2c <meltdown-spectre-impact-ndr-2t2c-full.csv>`_,
  88   - `csv format for 4t4c <meltdown-spectre-impact-ndr-4t4c-full.csv>`_,
  89   - `pretty ASCII format for 1t1c <meltdown-spectre-impact-ndr-1t1c-full.txt>`_,
  90   - `pretty ASCII format for 2t2c <meltdown-spectre-impact-ndr-2t2c-full.txt>`_,
  91   - `pretty ASCII format for 4t4c <meltdown-spectre-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: meltdown-spectre-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         ]{../_tmp/src/vpp_performance_tests/performance_impact_spectre/meltdown-spectre-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: meltdown-spectre-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         ]{../_tmp/src/vpp_performance_tests/performance_impact_spectre/meltdown-spectre-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 <meltdown-spectre-impact-pdr-1t1c-full.csv>`_,
 160   - `csv format for 2t2c <meltdown-spectre-impact-pdr-2t2c-full.csv>`_,
 161   - `csv format for 4t4c <meltdown-spectre-impact-pdr-4t4c-full.csv>`_,
 162   - `pretty ASCII format for 1t1c <meltdown-spectre-impact-pdr-1t1c-full.txt>`_,
 163   - `pretty ASCII format for 2t2c <meltdown-spectre-impact-pdr-2t2c-full.txt>`_,
 164   - `pretty ASCII format for 4t4c <meltdown-spectre-impact-pdr-4t4c-full.txt>`_.