mbox series

[v14,0/7] Lcore variables

Message ID 20241016131916.827788-1-mattias.ronnblom@ericsson.com (mailing list archive)
Headers
Series Lcore variables |

Message

Mattias Rönnblom Oct. 16, 2024, 1:19 p.m. UTC 
This patch set introduces a new API <rte_lcore_var.h> for static
per-lcore id data allocation.

Please refer to the <rte_lcore_var.h> API documentation for both a
rationale for this new API, and a comparison to the alternatives
available.

The question on how to best allocate static per-lcore memory has been
up several times on the dev mailing list, for example in the thread on
"random: use per lcore state" RFC by Stephen Hemminger.

Lcore variables are surely not the answer to all your per-lcore-data
needs, since it only allows for more-or-less static allocation. In the
author's opinion, it does however provide a reasonably simple and
clean and seemingly very much performant solution to a real problem.

Mattias Rönnblom (7):
  eal: add static per-lcore memory allocation facility
  eal: add lcore variable functional tests
  eal: add lcore variable performance test
  random: keep PRNG state in lcore variable
  power: keep per-lcore state in lcore variable
  service: keep per-lcore state in lcore variable
  eal: keep per-lcore power intrinsics state in lcore variable

 MAINTAINERS                                   |   6 +
 app/test/meson.build                          |   2 +
 app/test/test_lcore_var.c                     | 432 ++++++++++++++++++
 app/test/test_lcore_var_perf.c                | 256 +++++++++++
 config/rte_config.h                           |   1 +
 doc/api/doxy-api-index.md                     |   1 +
 .../prog_guide/env_abstraction_layer.rst      |  43 +-
 doc/guides/rel_notes/release_24_11.rst        |  14 +
 lib/eal/common/eal_common_lcore_var.c         | 138 ++++++
 lib/eal/common/eal_lcore_var.h                |  11 +
 lib/eal/common/meson.build                    |   1 +
 lib/eal/common/rte_random.c                   |  28 +-
 lib/eal/common/rte_service.c                  | 116 ++---
 lib/eal/freebsd/eal.c                         |   2 +
 lib/eal/include/meson.build                   |   1 +
 lib/eal/include/rte_lcore_var.h               | 394 ++++++++++++++++
 lib/eal/linux/eal.c                           |   2 +
 lib/eal/version.map                           |   1 +
 lib/eal/x86/rte_power_intrinsics.c            |  17 +-
 lib/power/rte_power_pmd_mgmt.c                |  35 +-
 20 files changed, 1409 insertions(+), 92 deletions(-)
 create mode 100644 app/test/test_lcore_var.c
 create mode 100644 app/test/test_lcore_var_perf.c
 create mode 100644 lib/eal/common/eal_common_lcore_var.c
 create mode 100644 lib/eal/common/eal_lcore_var.h
 create mode 100644 lib/eal/include/rte_lcore_var.h