new RCG test script

See merge request cds/advligorts!59

Builds test models (x1iop and x1tst)

	- Added delay to kernel object startup in moduleLoad
		- Used to be done in RCG startup script
	- Added check for correct number of PCIe cards found
		- Code now exits if REQUIRE_IO_CNT compile flag is set
		  (require_io_cnt = 1 in model Parameter block)
		- Error message sent to EPICS fe_status
	- Moved mbuf attachments out of moduleLoadIop and moduleLoadApp into
	  moduleLoadCommon.c, since common to both.

Update the args library to print the default value for an option as well when printing help.

See merge request cds/advligorts!68

Illustrated by the output of dix_xmit -h below (Note the ". Default [...]":

Usage: ./dix_xmit [options]
IX Dolphin based transmitter

Options are as follows:
 -h, --help               Show this help.
 -b mbuf name             Input buffer name. Default [local_dc]
 -m [20-100]              Input buffer size in mb. Default [100]
 -g [0-3]                 The IX memory group to output to. Default [0]
 -p epics prefix          The prefix for epics PVs that report status
 -l filename              Log file name
 -v                       Verbose output

Update the dix_recv/xmit programs to use the args command line parser.

See merge request cds/advligorts!67

Give them a consistent (and working) argument parser with help.  A quality of life improvement.

Remove zmq

See merge request cds/advligorts!66

The zmq streamers where kept around as a off the shelf method to move data for small (test) systems.  However the pub/sub code appears to work better, and has no distribution limitations either.  So remove the zmq code in favor of the pub/sub.

Replaced zeromq with a boost::asio based tcp client/server.

Daqd investigations

See merge request cds/advligorts!65

Mostly replacing magic numbers with symbolic constants and expanding comments.

This is to help properly track lifetimes of the work queues.

Put in a wrapper around pthread_create to allow specifying an arbitrary job to run in the guise of a std::function.  This keeps the flexibility (scheduler, stack size, ...) of pthreads but gives the us the ability to call more than just a void* (*)(void*).

With these changes the work queues have been moved out of object scope for both the producer and the daqd objects.  A few small static routines that were used to start worker threads in the producer/daqd are removed.

Added some debugging output to the cycle continuity checks and adjusted code so that the glitch warnings are terminations for daqd.

Broke the code out into its own header for easier testing.  Updated the code to allow catching up if it falls behind, not just jumping to the front if there is a data gap.

Updated the work queue to use C++11 constructs, and to use compile time determined sizes.

Moved the dcu_move_address structure to the global scope and into the producer.hh file.

It now catches the processing time of all the received dcus.  So it is a superset of the crc time.

Removed a producer cycle measurement that was recently added as the epics reporting variant was fixed.  Updated the crc timing measurements.

Add the crc checks to the ctest batch of tests.

The checksum_crc object needs to have the add method called to import data.
The recv time was being written to the recv time pv and the full cycle time pv.
Updated a checksum test to make sure the new and old code produce the same checksum.

Look for gaps in the transmission stream.

Renamed pub_xmit and sub_recv to cps_xmit/recv.

See merge request cds/advligorts!62

cps is cds pub sub

Omx investigations and pub_sub code

See merge request cds/advligorts!61

* removing some console output.
* Moving in a latched max spread value to epics
* Fixing the mean calculation for dcu_mean and spread_mean epics variables.
* Adding a late and very_late message epics pv to denote various forms of dropped messages.
* Renamed DROPPED_MESSAGES to UDP_DROPPED_MESSAGES.