[dpdk-dev] [PATCH v5 0/2] Dynamically configure mempool handle

[Santosh Shukla]

v5:
- Includes v4 minor review comment.
  Patches rebased on upstream tip / commit id:5dce9fcdb2

v4:
- Includes v3 review coment changes.
  Patches rebased on 06791a4bce: ethdev: get the supported pools for a port 

v3:
 - Rebased on top of v17.11-rc0
 - Updated version.map entry to v17.11.

v2:

DPDK has support for hw and sw mempool. Those mempool
can work optimal for specific PMD's. 
Example:
sw ring based PMD for Intel NICs.
HW mempool manager dpaa2 for dpaa2 PMD.
HW mempool manager fpa for octeontx PMD.

There could be a use-case where different vendor NIC's used
on the same platform and User like to configure mempool in such a way that
each of those NIC's should use their preferred mempool(For performance reasons).

Current mempool infrastrucure don't support such use-case.

This patchset tries to address that problem in 2 steps:

0) Allowing user to dynamically configure mempool handle by  
passing pool handle as eal arg to `--mbuf-pool-ops-name=<pool-handle>`.

1) Allowing PMD's to advertise their pool capability to an application.
>From an application point of view:
- The application must ask to PMD about supported pools.
- PMD will advertise his pool capability in priority order 
  '0' - Best match mempool ops for _that_ port (highest priority)
  '1' - PMD support this mempool ops.
- Based on those i/p from PMD, application to chose pool-hdl and
  do pool create.

Change History:
v5 --> v4:
- Renamed mbuf_pool_name to mbuf_pool_ops_name in [01/02]. (Suggested by
  Olivier)
- Incorporated review comment suggested by Olivier for [02/02].
  Refer specific patch for v5 change history.

v3 --> v4:
- Removed RTE_MBUF_XXX_POOL_NAMESIZE macro and replaced mbuf_pool_name
  with const. (Suggested by Olivier)
- Added eal arg info in doc guide.
- Removed _preferred_pool() api and replaced with
  rte_eth_dev_pools_ops_supported() api (Suggested by Olivier)


v2 --> v3:
 - Changed version.map from DPDK_17.08 to DPDK_17.11.

v1 --> v2:
 - Renamed rte_eal_get_mempool_name to rte_eal_mbuf_default_mempool_ops().
	(suggested by Olivier)
 - Renamed _get_preferred_pool to _get_preferred_pool_ops().
 - Updated API description and changes return val from -EINVAL to -ENOTSUP.
   (Suggested by Olivier)
* Specific details on v1-->v2 change summary described in each patch.

Checkpatch status:
- None.

Work History:
* Refer [1] for v1.

Thanks.

[1] http://dpdk.org/ml/archives/dev/2017-June/067022.html

Santosh Shukla (2):
  eal: allow user to override default pool handle
  ethdev: get the supported pool for a port

 doc/guides/freebsd_gsg/build_sample_apps.rst    |  3 +++
 doc/guides/linux_gsg/build_sample_apps.rst      |  3 +++
 doc/guides/testpmd_app_ug/run_app.rst           |  4 ++++
 lib/librte_eal/bsdapp/eal/eal.c                 | 10 ++++++++++
 lib/librte_eal/bsdapp/eal/rte_eal_version.map   |  7 +++++++
 lib/librte_eal/common/eal_common_options.c      |  3 +++
 lib/librte_eal/common/eal_internal_cfg.h        |  2 +-
 lib/librte_eal/common/eal_options.h             |  2 ++
 lib/librte_eal/common/include/rte_eal.h         |  9 +++++++++
 lib/librte_eal/linuxapp/eal/eal.c               | 11 +++++++++++
 lib/librte_eal/linuxapp/eal/rte_eal_version.map |  7 +++++++
 lib/librte_ether/rte_ethdev.c                   | 18 ++++++++++++++++++
 lib/librte_ether/rte_ethdev.h                   | 24 ++++++++++++++++++++++++
 lib/librte_ether/rte_ethdev_version.map         |  1 +
 lib/librte_mbuf/rte_mbuf.c                      |  5 +++--
 15 files changed, 106 insertions(+), 3 deletions(-)

-- 
2.14.1