[dpdk-dev] [PATCH v4 0/2] generic channel for multi-process communication
Tan, Jianfeng
jianfeng.tan at intel.com
Thu Jan 25 20:15:53 CET 2018
Apology, please ignore this version which is not correct. Will send out
a new version.
On 1/26/2018 3:14 AM, Jianfeng Tan wrote:
> v3->v4:
> - Drop the patch 3 on vfio communication (postponed).
> - Change names from rte_eal_mp_* -> rte_mp_* as suggested by Thomas.
> - Add nb_sent and nb_received in struct rte_mp_reply.
> - Standardize the return val of sendmsg, request, reply: 0 on sucess,
> (-1) on failure.
> - If we found an peer error when we send msg in primary, we try to
> remove the secondary socket; as there is no sync mechanism there
> (cannot do flock like regular file for socket file), we use a more
> complex socket name (with tsc in it).
> - Some other small changes.
>
> v2->v3:
> - Add pre-check for each APIs.
> - Remove the limitation of 8 secondary processes by: discard original
> register/unregister mechanism of secondary process, instead, primary
> discoveries secondary processes by looking up the folder for regex match.
> - Previous implementation use two sockets for msg and request, this version
> just uses one socket. And receive all kinds of messages in mp thread.
>
> v1->v2: (Address comments from Anatoly and Konstantin)
> - Use datagram unix socket to supersede stream unix socket + epoll.
> - Change the secondary add/del mechanism as now we use connection-less channel.
> - Add mp_mutex_action to sync action register/unregister/reference.
> - Limit max length of action name to 64B.
> - New APIs for synchronous communication: rte_eal_mp_request/rte_eal_mp_reply.
> - Formalize the errno handle.
> - Some other small issues.
>
> This patchset adds a generic channel for multi-process (primary/secondary)
> communication.
>
> Patch 1: addess the purpose and howto;
> Patch 2: add a syncrhonous way for the requests which need a immediate response.
>
> Jianfeng Tan (2):
> eal: add synchronous multi-process communication
> vfio: use the generic multi-process channel
>
> doc/guides/rel_notes/release_18_02.rst | 2 +
> lib/librte_eal/common/eal_common_proc.c | 254 +++++++++++++--
> lib/librte_eal/common/include/rte_eal.h | 58 +++-
> lib/librte_eal/linuxapp/eal/eal.c | 14 +-
> lib/librte_eal/linuxapp/eal/eal_vfio.c | 169 ++++------
> lib/librte_eal/linuxapp/eal/eal_vfio.h | 15 +-
> lib/librte_eal/linuxapp/eal/eal_vfio_mp_sync.c | 410 ++++---------------------
> lib/librte_eal/rte_eal_version.map | 2 +
> 8 files changed, 429 insertions(+), 495 deletions(-)
>
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