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From: Thomas Monjalon <thomas@monjalon.net>
To: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: dev@dpdk.org, Stephen Hemminger <stephen@networkplumber.org>,
	shahafs@mellanox.com, yskoh@mellanox.com, shreyansh.jain@nxp.com
Subject: Re: [dpdk-dev] [PATCH v3 0/4] Allow using external memory without malloc
Date: Thu, 20 Dec 2018 18:18:05 +0100	[thread overview]
Message-ID: <7324739.01YbsFNNIY@xps> (raw)
In-Reply-To: <20181220081646.55593779@xeon-e3>

20/12/2018 17:16, Stephen Hemminger:
> On Thu, 20 Dec 2018 15:32:37 +0000
> Anatoly Burakov <anatoly.burakov@intel.com> wrote:
> 
> > Currently, the only way to use externally allocated memory
> > is through rte_malloc API's. While this is fine for a lot
> > of use cases, it may not be suitable for certain other use
> > cases like manual memory management, etc.
> > 
> > This patchset adds another API to register memory segments
> > with DPDK (so that API's like ``rte_mem_virt2memseg`` could
> > be relied on by PMD's and such), but not create a malloc
> > heap out of them.
> > 
> > Aside from the obvious (not adding memory to a heap), the
> > other major difference between this API and the
> > ``rte_malloc_heap_*`` external memory functions is the fact
> > that no DMA mapping is performed automatically, as well as
> > no mem event callbacks are triggered.
> > 
> > This really draws a line in the sand, and there are now two
> > ways of doing things - do everything automatically (using
> > the ``rte_malloc_heap_*`` API's), or do everything manually
> > (``rte_extmem_*`` and future DMA mapping API [1] that would
> > replace ``rte_vfio_dma_map``). This way, the consistency of
> > API is kept, and flexibility is also allowed.
> > 
> > [1] https://mails.dpdk.org/archives/dev/2018-November/118175.html
> 
> Where are the examples for this? Give a sample application maybe.
> 
> Also there are no test cases.

It looks to be a big task, but yes, would be nice to have test
of external memory allocation in DPDK unit tests.

  reply	other threads:[~2018-12-20 17:18 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-29 13:48 [dpdk-dev] [PATCH " Anatoly Burakov
2018-11-29 13:48 ` [dpdk-dev] [PATCH 1/4] malloc: separate creating memseg list and malloc heap Anatoly Burakov
2018-12-14  9:33   ` Yongseok Koh
2018-11-29 13:48 ` [dpdk-dev] [PATCH 2/4] malloc: separate destroying memseg list and heap data Anatoly Burakov
2018-12-14  9:34   ` Yongseok Koh
2018-11-29 13:48 ` [dpdk-dev] [PATCH 3/4] mem: allow registering external memory areas Anatoly Burakov
2018-12-14  9:55   ` Yongseok Koh
2018-12-14 11:03     ` Burakov, Anatoly
2018-11-29 13:48 ` [dpdk-dev] [PATCH 4/4] mem: allow usage of non-heap external memory in multiprocess Anatoly Burakov
2018-12-14  9:56   ` Yongseok Koh
2018-12-02  5:48 ` [dpdk-dev] [PATCH 0/4] Allow using external memory without malloc Shahaf Shuler
2018-12-02 23:28   ` Yongseok Koh
2018-12-03 10:23     ` Burakov, Anatoly
2018-12-12 12:55       ` Yongseok Koh
2018-12-12 13:17         ` Burakov, Anatoly
2018-12-14 11:50 ` [dpdk-dev] [PATCH v2 " Anatoly Burakov
2018-12-20 15:32   ` [dpdk-dev] [PATCH v3 " Anatoly Burakov
2018-12-20 16:16     ` Stephen Hemminger
2018-12-20 17:18       ` Thomas Monjalon [this message]
2018-12-21  9:17         ` Burakov, Anatoly
2018-12-20 17:17     ` Thomas Monjalon
2018-12-20 15:32   ` [dpdk-dev] [PATCH v3 1/4] malloc: separate creating memseg list and malloc heap Anatoly Burakov
2018-12-20 15:32   ` [dpdk-dev] [PATCH v3 2/4] malloc: separate destroying memseg list and heap data Anatoly Burakov
2018-12-20 15:32   ` [dpdk-dev] [PATCH v3 3/4] mem: allow registering external memory areas Anatoly Burakov
2018-12-20 15:32   ` [dpdk-dev] [PATCH v3 4/4] mem: allow usage of non-heap external memory in multiprocess Anatoly Burakov
2018-12-14 11:50 ` [dpdk-dev] [PATCH v2 1/4] malloc: separate creating memseg list and malloc heap Anatoly Burakov
2018-12-14 11:50 ` [dpdk-dev] [PATCH v2 2/4] malloc: separate destroying memseg list and heap data Anatoly Burakov
2018-12-14 11:50 ` [dpdk-dev] [PATCH v2 3/4] mem: allow registering external memory areas Anatoly Burakov
2018-12-14 11:50 ` [dpdk-dev] [PATCH v2 4/4] mem: allow usage of non-heap external memory in multiprocess Anatoly Burakov

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