Re: [PATCH v3 0/4] rework and expand EAL lcore options

[Patrick Robb <probb@iol.unh.edu>]

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Please disregard the Community Lab DTS failure just reported on this
patchseries. I need to reconfigure the testbed and rerun the test.

On Fri, May 2, 2025 at 11:11 AM Bruce Richardson <bruce.richardson@intel.com>
wrote:

> Following discussion earlier on this thread on the previous RFCs and
> patches submitted [1], this series is a slightly different take on
> solving the same fundamental problem - making it easy to use CPU cores
> with ids >= RTE_MAX_LCORE, without having massive amounts of code
> complexity internally. As previously discussed[2] this patchset
> implements proposal "2a" and does the following:
>
> * marks the old coremask parameter (-c) and service core mask (-s) as
>   deprecated, so they can be dropped in future. Everything should now be
>   done using core lists where possible.
> * consolidates the, previously separate but similar, "-l" and "--lcores"
>   flags into just short and long versions of the same thing. This does
>   not affect the "--lcores" flag at all, but expands the scope of what
>   was possible with "-l".
> * a new flag, with long/short versions, is added as "-L" to allow the
>   user to just specify a range or set of physical CPU core ids to be
>   used by the app, and have them automatically mapped internally to a
>   set of lcore ids starting at 0. This provides the "easy solution" to
>   the original problem stated above.
>
> For completeness, since it's in the same area, the previously separate
> documentation patch, adding examples for the "--lcores" parameter, is
> rolled into this series as patch 3.
>
> [1] https://patches.dpdk.org/project/dpdk/list/?series=34911&state=*
> [2]
> https://inbox.dpdk.org/dev/Z_PIBLQIT3eu6Ab3@bricha3-mobl1.ger.corp.intel.com/#t
>
> Bruce Richardson (4):
>   eal: deprecate old coremask-based EAL parameters
>   eal: merge corelist and core mapping options
>   doc: provide examples of using lcores EAL parameter
>   eal: add option for auto-mapping cpu ids to low lcore ids
>
>  doc/guides/eventdevs/dlb2.rst                 |   6 +-
>  doc/guides/faq/faq.rst                        |   8 +-
>  doc/guides/linux_gsg/build_sample_apps.rst    |   7 +-
>  doc/guides/linux_gsg/eal_args.include.rst     |  61 ++++--
>  .../prog_guide/env_abstraction_layer.rst      |   3 +-
>  doc/guides/prog_guide/meson_ut.rst            |   2 +-
>  doc/guides/prog_guide/multi_proc_support.rst  |   2 +-
>  doc/guides/prog_guide/service_cores.rst       |   8 +-
>  doc/guides/rel_notes/deprecation.rst          |  10 +
>  doc/guides/sample_app_ug/ip_frag.rst          |   7 +-
>  doc/guides/sample_app_ug/ip_reassembly.rst    |   7 +-
>  doc/guides/sample_app_ug/multi_process.rst    |  14 +-
>  doc/guides/sample_app_ug/qos_scheduler.rst    |   2 +-
>  doc/guides/sample_app_ug/test_pipeline.rst    |   2 +-
>  doc/guides/tools/testbbdev.rst                |   2 +-
>  lib/eal/common/eal_common_options.c           | 202 +++++++-----------
>  lib/eal/common/eal_options.h                  |   6 +-
>  lib/eal/windows/include/sched.h               |   1 +
>  18 files changed, 168 insertions(+), 182 deletions(-)
>
> --
> 2.45.2
>
>

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