[dpdk-dev] [PATCH v2 0/5] Dynamic HW Mempool Detection Support

[Hemant Agrawal]

W.r.t the multiple discussions in the past about the ability to
dynamically detect the HW mempool support. [1],[2] & [3]

This patchset helps in removing the current static mempool selection
model and provides a flexible model to select the pktmbuf mempool
in more dynamic way. 

1) This patchset updates the hw mempool on the basis of device probe()),
   thus avoiding the need to specify the hw mempool in config file and 
   focing different binaries for diffirent config architectures.
2) Selection of mempool ops though --mbuf-pool-ops-name (cmd line arg)
   which can overridden the scheme(1)
3) A new best mempool ops selection logic.
4) A new wrapper for the pktmbuf_pool_create helper to take mempool ops
   name as an argument as well.

*Limitations and open points*

It was suggested to add all APIs in librte_mbuf, currently internal_config
is storing the mempool_ops names. So internal_config is exported in this
patchset. An alternate would be to keep these APIs in eal only and access
them indirectly from librte_mbuf.

Moreover, this logic can be further extended with addition for following
patch, which is still under discussion:

The ethdev PMD capability exposed through existing
rte_eth_dev_pool_ops_supported() to select the update the mempool ops with
some "weight" based algorithm like:
http://dpdk.org/dev/patchwork/patch/32245/

-----
[1]Multiple Pktmbuf mempool support
http://dpdk.org/ml/archives/dev/2017-September/076531.html
[2]Allow application set mempool handle
http://dpdk.org/ml/archives/dev/2017-June/067022.html
Other discussions
[3] http://dpdk.org/ml/archives/dev/2017-December/084775.html 
------
Changes in v2:
1. Changed the active mempool to platform mempool
2. Moved all the relavant APIs to librte_mbuf 
3. Added pktmbuf_create_pool_specific wrapper in this patch series.

Hemant Agrawal (5):
  eal: prefix mbuf pool ops name with user defined
  eal: add platform mempool ops name in internal config
  mbuf: support register mempool Hw ops name APIs
  mbuf: pktmbuf pool create helper for specific mempool ops
  mbuf: add user command line config mempools ops API

 doc/guides/rel_notes/deprecation.rst       |  7 +++
 lib/librte_eal/bsdapp/eal/eal.c            |  4 +-
 lib/librte_eal/common/eal_common_options.c |  3 +-
 lib/librte_eal/common/eal_internal_cfg.h   |  5 ++-
 lib/librte_eal/linuxapp/eal/eal.c          |  4 +-
 lib/librte_eal/rte_eal_version.map         |  1 +
 lib/librte_mbuf/Makefile                   |  1 +
 lib/librte_mbuf/rte_mbuf.c                 | 67 ++++++++++++++++++++++++---
 lib/librte_mbuf/rte_mbuf.h                 | 72 ++++++++++++++++++++++++++++++
 lib/librte_mbuf/rte_mbuf_version.map       | 10 +++++
 10 files changed, 162 insertions(+), 12 deletions(-)

-- 
2.7.4