1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2018 Intel Corporation.
9 Set the hexadecimal bitmask of the cores to run on.
13 List of cores to run on
15 The argument format is ``<c1>[-c2][,c3[-c4],...]``
16 where ``c1``, ``c2``, etc are core indexes between 0 and 128.
18 * ``--lcores <core map>``
20 Map lcore set to physical cpu set
22 The argument format is::
24 <lcores[@cpus]>[<,lcores[@cpus]>...]
26 Lcore and CPU lists are grouped by ``(`` and ``)`` Within the group.
27 The ``-`` character is used as a range separator and ``,`` is used as a
28 single number separator.
29 The grouping ``()`` can be omitted for single element group.
30 The ``@`` can be omitted if cpus and lcores have the same value.
33 At a given instance only one core option ``--lcores``, ``-l`` or ``-c`` can
36 * ``--main-lcore <core ID>``
38 Core ID that is used as main.
40 * ``-s <service core mask>``
42 Hexadecimal bitmask of cores to be used as service cores.
44 Device-related options
45 ~~~~~~~~~~~~~~~~~~~~~~
47 * ``-b, --block <[domain:]bus:devid.func>``
49 Skip probing a PCI device to prevent EAL from using it.
50 Multiple -b options are allowed.
53 Block list cannot be used with the allow list ``-a`` option.
55 * ``-a, --allow <[domain:]bus:devid.func>``
57 Add a PCI device in to the list of devices to probe.
60 Allow list cannot be used with the block list ``-b`` option.
62 * ``--vdev <device arguments>``
64 Add a virtual device using the format::
66 <driver><id>[,key=val, ...]
70 --vdev 'net_pcap0,rx_pcap=input.pcap,tx_pcap=output.pcap'
72 * ``-d <path to shared object or directory>``
74 Load external drivers. An argument can be a single shared object file, or a
75 directory containing multiple driver shared objects. Multiple -d options are
82 Multiprocessing-related options
83 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
85 * ``--proc-type <primary|secondary|auto>``
87 Set the type of the current process.
89 * ``--base-virtaddr <address>``
91 Attempt to use a different starting address for all memory maps of the
92 primary DPDK process. This can be helpful if secondary processes cannot
93 start due to conflicts in address map.
95 Memory-related options
96 ~~~~~~~~~~~~~~~~~~~~~~
98 * ``-n <number of channels>``
100 Set the number of memory channels to use.
102 * ``-r <number of ranks>``
104 Set the number of memory ranks (auto-detected by default).
108 Amount of memory to preallocate at startup.
112 Do not create any shared data structures and run entirely in memory. Implies
113 ``--no-shconf`` and (if applicable) ``--huge-unlink``.
115 * ``--iova-mode <pa|va>``
117 Force IOVA mode to a specific value.
124 No shared files created (implies no secondary process support).
128 Use anonymous memory instead of hugepages (implies no secondary process
131 * ``--log-level <type:val>``
133 Specify log level for a specific component. For example::
135 --log-level lib.eal:debug
137 Can be specified multiple times.
139 * ``--trace=<regex-match>``
141 Enable trace based on regular expression trace name. By default, the trace is
142 disabled. User must specify this option to enable trace.
145 Global trace configuration for EAL only::
149 Global trace configuration for ALL the components::
153 Can be specified multiple times up to 32 times.
155 * ``--trace-dir=<directory path>``
157 Specify trace directory for trace output. For example:
159 Configuring ``/tmp/`` as a trace output directory::
163 By default, trace output will created at ``home`` directory and parameter
164 must be specified once only.
166 * ``--trace-bufsz=<val>``
168 Specify maximum size of allocated memory for trace output for each thread.
169 Valid unit can be either ``B`` or ``K`` or ``M`` for ``Bytes``, ``KBytes``
170 and ``MBytes`` respectively. For example:
172 Configuring ``2MB`` as a maximum size for trace output file::
176 By default, size of trace output file is ``1MB`` and parameter
177 must be specified once only.
179 * ``--trace-mode=<o[verwrite] | d[iscard] >``
181 Specify the mode of update of trace output file. Either update on a file
182 can be wrapped or discarded when file size reaches its maximum limit.
185 To ``discard`` update on trace output file::
187 --trace-mode=d or --trace-mode=discard
189 Default mode is ``overwrite`` and parameter must be specified once only.
196 Display help message listing all EAL parameters.
200 Display the version information on startup.
202 * ``mbuf-pool-ops-name``:
204 Pool ops name for mbuf to use.
208 Enable telemetry (enabled by default).
210 * ``--no-telemetry``:
214 * ``--force-max-simd-bitwidth=<val>``:
216 Specify the maximum SIMD bitwidth size to handle. This limits which vector paths,
217 if any, are taken, as any paths taken must use a bitwidth below the max bitwidth limit.
218 For example, to allow all SIMD bitwidths up to and including AVX-512::
220 --force-max-simd-bitwidth=512
222 The following example shows limiting the bitwidth to 64-bits to disable all vector code::
224 --force-max-simd-bitwidth=64
226 To disable use of max SIMD bitwidth limit::
228 --force-max-simd-bitwidth=0