attach patch:
- remove mds global mutex out of RR tipc data receive buffer thread
- add TS thread to process received tipc data
- dynamic allocation
Attachments:
-
[mds_dynamic_malloc.diff](https://sourceforge.net/p/opensaf/tickets/_discuss/thread/e203d417/3c16/attachment/mds_dynamic_malloc.diff)
(18.3 kB; text/x-patch)
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** [tickets:#2855] mds: Improve tipc receive logic**
**Status:** accepted
**Milestone:** 5.18.08
**Created:** Wed May 16, 2018 12:29 PM UTC by Hans Nordebäck
**Last Updated:** Thu Aug 09, 2018 06:14 AM UTC
**Owner:** Minh Hon Chau
The tipc receive buffer is 2MB, should not be extended as that will affect e.g.
available kernel memory. The receive thread normally runs as a realtime thread,
RR and with the gl_mds_library_mutex taken in contention with other MDS, time
sharing threads. In several cases TIPC_OVERLOAD has happened as consuming
messages are not fast enough and TIPC drops these message at receive buffer
full.
This ticket will change the receive thread from a realtime thread to the
standard round-robin time-sharing policy and a new realtime thread will be
created to only receive messages and adding these to a larger buffer using a
lock-free algorithm. The old receive thread will run as the standard time
sharing thread and will consume messages from this shared buffer. The recvmsg
in recvfrom_connectionless will be changed to read from the shared buffer.
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