| Commit message (Collapse) | Author | Age |
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This compiles correctly, but doesn't actually deliver events yet.
As part of this, I've made most of the initializables in nng
safe to tear-down if uninitialized (or set to zero e.g. via calloc).
This makes it loads easier to write the teardown on error code, since
I can deinit everything, without worrying about which things have been
initialized and which have not.
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This should eliminate all need for protocols to do their own
thread management tasks.
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In an attempt to simplify the protocol implementation, and hopefully
track down a close related race, we've made it so that most protocols
need not worry about locks, and can access the socket lock if they do
need a lock. They also let the socket manage their workers, for the
most part. (The req protocol is special, since it needs a top level
work distributor, *and* a resender.)
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PUSH attempts to do a round-robin based distribution. However, I
noticed that there is a bug in REQ, because REQ sockets will continue
to pull down work until the first one no longer has room. This can
in theory lead to scheduliung imbalances when the load is very light.
(Under heavy load, the backpressure dominates.)
Also, I note that mangos suffers the same problem. It does not
make any attempt to deliver work equally, basically each pipe winds
up pulling messages until its own buffers are full. This is bad.
We can borrow the logic here for both REQ and mangos.
None of this is tested yet.
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