1 Performance Impact of Meltdown and Spectre Patches
2 ==================================================
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`.
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
19 NDR throughput: Best 20 changes
20 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 :file: meltdown-spectre-impact-ndr-1t1c-top.csv
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},
39 \csvautobooklongtable[separator=comma,
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}
48 NDR throughput: Worst 20 changes
49 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
55 :file: meltdown-spectre-impact-ndr-1t1c-bottom.csv
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},
68 \csvautobooklongtable[separator=comma,
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}
80 NDR throughput: All changes
81 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
83 Complete results for all NDR tests are available in a CSV and pretty
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>`_.
93 PDR throughput: Best 20 changes
94 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
100 :file: meltdown-spectre-impact-pdr-1t1c-top.csv
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},
113 \csvautobooklongtable[separator=comma,
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}
122 PDR throughput: Worst 20 changes
123 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
129 :file: meltdown-spectre-impact-pdr-1t1c-bottom.csv
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},
142 \csvautobooklongtable[separator=comma,
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}
153 PDR throughput: All changes
154 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
156 Complete results for all PDR tests are available in a CSV and pretty
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>`_.