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+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright(c) 2010-2014 Intel Corporation.
.. _Mempool_Library:
the speed at which a core can access its own cache for a specific memory pool without locks provides performance gains.
The cache is composed of a small, per-core table of pointers and its length (used as a stack).
-This cache can be enabled or disabled at creation of the pool.
+This internal cache can be enabled or disabled at creation of the pool.
The maximum size of the cache is static and is defined at compilation time (CONFIG_RTE_MEMPOOL_CACHE_MAX_SIZE).
A mempool in Memory with its Associated Ring
+Alternatively to the internal default per-lcore local cache, an application can create and manage external caches through the ``rte_mempool_cache_create()``, ``rte_mempool_cache_free()`` and ``rte_mempool_cache_flush()`` calls.
+These user-owned caches can be explicitly passed to ``rte_mempool_generic_put()`` and ``rte_mempool_generic_get()``.
+The ``rte_mempool_default_cache()`` call returns the default internal cache if any.
+In contrast to the default caches, user-owned caches can be used by non-EAL threads too.
Mempool Handlers
------------------------
There are two aspects to a mempool handler.
* Adding the code for your new mempool operations (ops). This is achieved by
- adding a new mempool ops code, and using the ``REGISTER_MEMPOOL_OPS`` macro.
+ adding a new mempool ops code, and using the ``MEMPOOL_REGISTER_OPS`` macro.
* Using the new API to call ``rte_mempool_create_empty()`` and
``rte_mempool_set_ops_byname()`` to create a new mempool and specifying which
(``RTE_MBUF_DEFAULT_MEMPOOL_OPS``) that allows the application to make use of
an alternative mempool handler.
+ .. note::
+
+ When running a DPDK application with shared libraries, mempool handler
+ shared objects specified with the '-d' EAL command-line parameter are
+ dynamically loaded. When running a multi-process application with shared
+ libraries, the -d arguments for mempool handlers *must be specified in the
+ same order for all processes* to ensure correct operation.
+
Use Cases
---------