If -g <ix group> argument is not set, then code will simply
write to shared memory.  In this way, code can run on a FW/NDS computer in 
a system with no data concentrator, and receive data directly from 
FE computers via 0MQ.


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or, with the -e option, can send data via ZMQ.


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Also, now only sends data for actively running models.


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shared memory instead of passing on via ZMQ publisher.


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This code essentially converts DAQ data as sent by FE models
to shared memory into new daq_multi_cycle data type in local
shared memory.
Intended use is as DAQ for standalone computers and common interface
for DAQ networking software using ZeroMQ, Dolphin, MX, etc.


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Took out entire message CRC checks, which should be fixed and reinserted at some point.


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Some fixes to ix_dc_xmit for cycle data size. Now funtional with a ZMQ receiver writing shared memory.


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Modified cycle_block_size to align to 8 byte boundary, required upstream for sending data via Dolphin.


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When run on gcc 4.4 the zmq_recv process would segfault on the
construction of the zmq receiving object.  This is a rewrite of that
code back to C in hopes that that cleared up an issue specific to gcc 4.4.

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At least for testing purposes we need zmq_recv to build on gcc 4.4, so
make it work on the older gcc.  The code still requires c++0x/c++11 but
adds a work around for std::atomic not being available.

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   - Send CRC from DC to NDS/FB computers for data verification.
   - Needed 8 byte alignment to multi_cycle data for proper xmission on Dolphin.


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Added CRC calculation to dc_xmit, which is compared at dc_fb_rcv.
Moved heartbeat location of ix_multi_stream to ix_rcv_threads.


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Next step is clean up and test.


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zmq_recv was not passing the data crc through, fix that.
producer_shmem needed to stop using an old rmIpc structure that no longer
applies.

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Added debug output to:
daqd_shmem
fe_stream_test
zmq_multi_stream
zmq_dc_recv/zmq_recv

to show config & data crc values on the output streams.

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Still a work in progress.


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