Project

General

Profile

Running DAQ Interface » History » Version 90

John Freeman, 12/03/2014 11:45 AM

1 58 John Freeman
{{toc}}
2 58 John Freeman
3 49 Erik Blaufuss
h1. Getting help
4 1 John Freeman
5 78 John Freeman
If, after reading this document (in particular, the "Troubleshooting and FAQ" section) you run into issues, or have questions, please contact:
6 49 Erik Blaufuss
* DAQInterface
7 49 Erik Blaufuss
** John Freeman - jcfree@fnal.gov
8 62 John Freeman
* RunControl
9 49 Erik Blaufuss
** Erik Blaufuss - blaufuss@icecube.umd.edu
10 66 John Freeman
* Configuration Manager
11 66 John Freeman
** Jon Paley - jpaley@anl.gov
12 1 John Freeman
13 1 John Freeman
h1. Starting DAQInterface and Run Control
14 1 John Freeman
15 66 John Freeman
The DAQ software, consisting of RunControl, the configuration manager and DAQInterface (as well as the artdaq processes it controls) is designed to be run on lbne35t-gateway01.fnal.gov, using the lbnedaq account. If you need access to the lbnedaq@lbne35t-gateway01.fnal.gov account, please contact one of us.
16 66 John Freeman
Primarily of developer (as opposed to user) interest, DAQInterface and RunControl software can also be run on the lbnedaqtest01 VM machine, please contact John Freeman at jcfree@fnal.gov, for more details.
17 49 Erik Blaufuss
18 66 John Freeman
The installed code is located at lbne35t-gateway01.fnal.gov:/data/lbnedaq/scratch/DAQInterface/lbnerc. To get started, login and first setup the environment:
19 49 Erik Blaufuss
20 30 John Freeman
<pre>
21 33 John Freeman
ssh lbnedaq@lbne35t-gateway01.fnal.gov
22 1 John Freeman
cd /data/lbnedaq/scratch/DAQInterface
23 1 John Freeman
source fireup
24 1 John Freeman
</pre>
25 1 John Freeman
26 66 John Freeman
This will take you into the /data/lbnedaq/scratch/DAQInterface/lbnerc directory. It's a good idea to check whether lbnecontrol (the RunControl application), DAQInterface (the component which intermediates between RunControl, the configuration manager, and the artdaq processes) and the configuration manager are already running; if they aren't, the instructions below won't work. Also worth noting is that as of 11/21/14, attempts to use multiple DAQs (implying multiple instances of RunControl, DAQInterface, etc.) has not been attempted and likely will not work. To check for RunControl and DAQInterface, you can try:
27 1 John Freeman
28 1 John Freeman
<pre>
29 49 Erik Blaufuss
lbnecmd check
30 1 John Freeman
</pre>
31 1 John Freeman
32 61 John Freeman
This will display the current state of DAQInterface and RunControl. The example below shows that both RunControl and DAQInterface are running, but the DAQ run is in the stopped state:
33 49 Erik Blaufuss
<pre>
34 49 Erik Blaufuss
(env)[lbnedaq@lbne35t-gateway01 lbnerc]$ lbnecmd check
35 49 Erik Blaufuss
lbnecontrol: running
36 49 Erik Blaufuss
daqint@localhost:5770 (synchronous): stopped
37 49 Erik Blaufuss
</pre>
38 1 John Freeman
39 73 John Freeman
If RunControl is running, and at some point DAQInterface was running but has since been killed:
40 73 John Freeman
<pre>
41 73 John Freeman
lbnecontrol: running
42 73 John Freeman
daqint@localhost:5770 (synchronous): missing
43 73 John Freeman
</pre>
44 73 John Freeman
(In this case, just restart DAQInterface).
45 73 John Freeman
46 49 Erik Blaufuss
If RunControl is not running, you'll see something like:
47 1 John Freeman
<pre>
48 49 Erik Blaufuss
(env)[lbnedaq@lbne35t-gateway01 lbnerc]$ lbnecmd check
49 49 Erik Blaufuss
check failed: '[Errno 111] Connection refused'.  Is lbnecontrol running?
50 1 John Freeman
</pre>
51 1 John Freeman
52 61 John Freeman
To check whether the configuration manager is running, you can simply use Linux commands:
53 61 John Freeman
54 61 John Freeman
<pre>
55 61 John Freeman
ps aux | grep -v grep | grep CfgMgrApp
56 61 John Freeman
</pre>
57 61 John Freeman
58 71 John Freeman
This will either return info on the CfgMgrApp process, or print nothing if it's not running. In fact, it's possible to use Linux commands to check the status of all three programs:
59 71 John Freeman
60 71 John Freeman
<pre>
61 75 John Freeman
ps aux | grep -v grep | egrep -e lbnecontrol -e daqinterface -e CfgMgrApp
62 71 John Freeman
</pre>
63 61 John Freeman
64 1 John Freeman
h3. Starting RunControl
65 49 Erik Blaufuss
66 49 Erik Blaufuss
To start RunControl (after loading environment as above):
67 60 John Freeman
<pre>
68 70 John Freeman
rm /tmp/lbnecontrol.pid  # (This should only be necessary of RunControl software wasn't stopped cleanly)
69 49 Erik Blaufuss
lbnecmd launch
70 49 Erik Blaufuss
</pre>
71 1 John Freeman
72 1 John Freeman
h3. Starting DAQInterface
73 1 John Freeman
74 61 John Freeman
To start DAQInterface (after loading environment as above), the basic command is:
75 1 John Freeman
<pre>
76 82 John Freeman
daqinterface -n daqint -r 5570 -c localhost -H localhost -f <daqinterface file> &
77 1 John Freeman
</pre>
78 82 John Freeman
Here, the "daqint" argument is arbitrary, and is the name you'll give the DAQInterface process in RunControl; the "5570" argument is the port off of which DAQInterface will run. The "-f <daqinterface file>" is optional; if left out, the lbnerc/docs/config.txt file will be used to configure DAQInterface, otherwise <daqinterface file> will be used. The DAQInterface configuration is not to be confused with run configurations handled by the configuration manager; see the section "Configuring DAQInterface" for more. 
79 82 John Freeman
80 82 John Freeman
If multiple users with different terminals wish to check the DAQ output, it is recommended to try:
81 1 John Freeman
<pre>
82 82 John Freeman
stdbuf -oL daqinterface -n daqint -r 5570 -c localhost -H localhost -f <daqinterface file> >>~/DI.log 2>&1 &
83 1 John Freeman
</pre>
84 1 John Freeman
This will launch daqinterface in the background, with all messages being collected (appended to the bottom of...) in the file ~/DI.log  (The stdbuf -oL prevents and buffering of output to the file)
85 82 John Freeman
86 1 John Freeman
h3. Starting the configuration manager
87 1 John Freeman
88 86 John Freeman
Please see the "Starting up the CfgMgrApp on lbne35t-gateway01" section of Jon Paley's documentation here: https://cdcvs.fnal.gov/redmine/projects/fhicl_cfgmgr/wiki
89 62 John Freeman
90 61 John Freeman
h3. Forcing cleanup: performing a hard reset of RunControl, DAQInterface and the configuration manager
91 49 Erik Blaufuss
92 85 John Freeman
If needed, you can track down the process names and kill them explicitly to get a clean reset, using the same Linux command shown above to get process info:
93 49 Erik Blaufuss
<pre>
94 80 John Freeman
ps aux | grep -v grep | egrep -e lbnecontrol -e daqinterface -e CfgMgrApp
95 49 Erik Blaufuss
</pre>
96 88 John Freeman
Keep in mind that if these processes are running, it might mean that someone else is using the DAQ, or that someone else who's done using it forgot to clean up. As the 9th and 10th fields of the row of variables "ps aux" returns concern how long the program has been running, you can use these values as well as your best judgement, then, before deciding these processes are not in active use and killing them.   To kill them, keeping in mind that the second field returned from "ps aux" is the process id (PID), use:
97 1 John Freeman
<pre>
98 49 Erik Blaufuss
kill <PID>
99 1 John Freeman
</pre>
100 83 John Freeman
If daqinterface is killed externally, then if it was in any state other than "stopped" at the time (and it likely was, otherwise a hard reset would likely have been avoidable), it's quite possible that it's left "orphaned" artdaq processes. If this is the case, you'll want to clean these up before trying to run the DAQ again, as they'll block the ports if they remain alive as "zombie" processes. Check the DAQInterface configuration file (defaults to lbnerc/docs/config.txt unless an alternate was supplied via the "-f" option to DAQInterface) to see which node the PMT (Process Management Tool) was running on, and check for it with
101 74 John Freeman
<pre>
102 74 John Freeman
ps aux | grep -v grep | grep pmt.rb
103 74 John Freeman
</pre>
104 75 John Freeman
Use this to get the process ID to kill it. Of course, also be aware that if artdaq processes were in communication with hardware when the orphaning occurred, killing them off might result in issues for the hardware, but the specifics of any hardware issues that may arise go beyond the scope of this document.
105 1 John Freeman
106 61 John Freeman
h1. Configuring and starting Runs
107 1 John Freeman
108 61 John Freeman
Now, you can take the DAQ system through the standard transitions to start a DAQ run.  At all stages, you can use the "lbnecmd check" command to see what state DAQInterface is in; note that you'll want to wait for a transition to complete before issuing another one, otherwise you'll receive a warning and the transition request will be ignored. DAQInterface will also report to its log file when transitions are complete:
109 49 Erik Blaufuss
<pre>
110 49 Erik Blaufuss
Initialize transition complete; if running DAQInterface in the background, can press <enter> to return to shell prompt
111 61 John Freeman
</pre>
112 1 John Freeman
Note that if a high "debug level" has been set (see below for more on this), this message can get buried in a set of output messages; in this case "lbnecmd check" may be the easiest way to determine what state the system is in. 
113 1 John Freeman
114 62 John Freeman
h2.  Selecting a configuration and DAQ components
115 49 Erik Blaufuss
116 1 John Freeman
*Before initializing or starting a DAQ run*, a configuration and set of DAQComponents must be selected.  This is done via RunControl.
117 1 John Freeman
118 49 Erik Blaufuss
h3. List and select a configuration:
119 1 John Freeman
120 62 John Freeman
To see the list of available configurations (queried from the configuration manager):
121 49 Erik Blaufuss
<pre>
122 49 Erik Blaufuss
lbnecmd listconfigs
123 1 John Freeman
</pre>
124 49 Erik Blaufuss
Will return a list of configs:
125 49 Erik Blaufuss
<pre>
126 49 Erik Blaufuss
Available configs (Name : description)
127 1 John Freeman
128 49 Erik Blaufuss
demo : Pithy description
129 49 Erik Blaufuss
tmp1 : Pithy description
130 49 Erik Blaufuss
...
131 30 John Freeman
132 49 Erik Blaufuss
Current selected config: No Config
133 49 Erik Blaufuss
</pre>
134 49 Erik Blaufuss
This lists all available configs, as well as the current selected config (Note, default config is "No Config").  You can then select a configuration:
135 49 Erik Blaufuss
<pre> 
136 49 Erik Blaufuss
lbnecmd setconfig demo
137 1 John Freeman
</pre>
138 90 John Freeman
This will return "OK" if successful; "lbnecmd listconfigs" will then show this as the current config.  If the specified configuration is not known, an error is returned. Instructions on how to add a configuration are given later in this document.
139 1 John Freeman
140 49 Erik Blaufuss
h3. List and select DAQ components.
141 1 John Freeman
142 62 John Freeman
You can select which portions of the LBNE DAQ setup you want to use in the upcoming run.  These are mapped generally to the ArtDAQ BoardReaderMain processes
143 90 John Freeman
that read them out.   As an operator, you need to ensure that there are configuration files available in the configuration manager for the DAQ Components that you select here, or DAQInterface will return an error.
144 38 John Freeman
145 1 John Freeman
To see the list of available DAQ components:
146 49 Erik Blaufuss
<pre>
147 1 John Freeman
lbnecmd listdaqcomps
148 49 Erik Blaufuss
</pre>
149 62 John Freeman
Will return a list of components available and selected (*Default* is ALL available components), e.g.:
150 1 John Freeman
<pre>
151 49 Erik Blaufuss
{'available': {'component02': ['lbnedaq2', '5206'], 'component01': ['lbnedaq2', '5205']}}
152 49 Erik Blaufuss
{'selected': {'component02': ['lbnedaq2', '5206'], 'component01': ['lbnedaq2', '5205']}}
153 49 Erik Blaufuss
</pre>
154 62 John Freeman
Shown are the available components by name, along with the requested host/port to run the BoardReaderMain process on. You can then select a list of DAQ components to use in the run:
155 49 Erik Blaufuss
<pre>
156 49 Erik Blaufuss
lbnecmd setdaqcomps component01 component02
157 49 Erik Blaufuss
</pre>
158 62 John Freeman
This will return "OK" if successful ("lbnecmd listdaqcomps" will show this in the "selected" row of components).  If the specified compnents are not known, an error is returned.
159 49 Erik Blaufuss
To change the list of available components, see below.
160 29 John Freeman
161 49 Erik Blaufuss
h2. Configuring, starting, stopping and terminating a Run
162 1 John Freeman
163 66 John Freeman
For each of these transitions, please recall that while "lbnecmd <cmd>" returns very quickly, the actual issued command can take several seconds or minutes to complete.  Before issuing another command, be sure that the transition is complete by using the check command:
164 1 John Freeman
<pre>
165 49 Erik Blaufuss
lbnecmd check
166 1 John Freeman
</pre>
167 62 John Freeman
For example, before issuing the "start" transition, you can use this command to ensure that the DAQ is in the "ready" state and not still in the "initializing" stage.
168 1 John Freeman
169 49 Erik Blaufuss
First, take DAQInterface from the "stopped" to the "ready" state; this will create the artdaq processes on the hosts you selected (DAQ components), and initialize them with the FHiCL configuration:
170 1 John Freeman
<pre>
171 1 John Freeman
lbnecmd init daq
172 1 John Freeman
</pre>
173 1 John Freeman
174 49 Erik Blaufuss
Take DAQInterface from the "ready" to the "running" state, in order to begin taking data:
175 29 John Freeman
<pre>
176 1 John Freeman
lbnecmd start daq
177 29 John Freeman
</pre>
178 49 Erik Blaufuss
Note: the current run number is displayed when DAQ is in the running state using the "lbnecmd check" command:
179 49 Erik Blaufuss
<pre>
180 49 Erik Blaufuss
lbnecmd check
181 49 Erik Blaufuss
lbnecontrol: running
182 49 Erik Blaufuss
Run number: 207
183 49 Erik Blaufuss
Run configuration: demo
184 1 John Freeman
185 49 Erik Blaufuss
daqint@localhost:5570 (synchronous): running
186 49 Erik Blaufuss
</pre>
187 49 Erik Blaufuss
188 49 Erik Blaufuss
Pause the running of the DAQ, putting DAQInterface into the "paused" state.  This will cause the current open output file to be closed and given a name reflecting the current run number:
189 22 John Freeman
<pre>
190 21 John Freeman
lbnecmd pause daq
191 42 John Freeman
</pre>
192 41 John Freeman
193 1 John Freeman
Resume the running of the DAQ, putting returning to the "running" state.  This will restart data taking to a new output file:
194 48 John Freeman
<pre>
195 48 John Freeman
lbnecmd resume daq
196 48 John Freeman
</pre>
197 48 John Freeman
198 48 John Freeman
Halt the running of the DAQ, returning DAQInterface to the "ready" state from the "running" state:
199 48 John Freeman
<pre>
200 48 John Freeman
lbnecmd stop daq
201 49 Erik Blaufuss
</pre>
202 49 Erik Blaufuss
From the ready state, you can start a new run with the same configuration and DAQ components you originally selected. 
203 62 John Freeman
*NOTE* To select a new configuration or DAQ component set, you must kill all ArtDAQ processes and return DAQInterface to its "stopped" state with the "terminate" command:
204 1 John Freeman
205 1 John Freeman
<pre>
206 1 John Freeman
lbnecmd terminate daq
207 1 John Freeman
</pre>
208 67 Erik Blaufuss
209 67 Erik Blaufuss
If you want to stop all RunControl processes (known as "lbnecontrol"):
210 67 Erik Blaufuss
<pre>
211 67 Erik Blaufuss
lbnecmd kill
212 67 Erik Blaufuss
</pre>
213 67 Erik Blaufuss
After this, you will need to relaunch RunControl as above.
214 1 John Freeman
215 49 Erik Blaufuss
h2. After your DAQ run.
216 1 John Freeman
217 49 Erik Blaufuss
Once you've completed your run, there are a few things you can look at. 
218 48 John Freeman
219 76 John Freeman
h3. The DAQ log
220 76 John Freeman
221 83 John Freeman
A record of the DAQ's output will be saved in the subdirectory pmt/ relative to where you specified the output logfiles; thus given the "log directory" setting in the example DAQInterface configuration file below, you'd find the output in /data/lbnedaq/daqlogs/pmt/. 
222 76 John Freeman
223 76 John Freeman
h3. The run record
224 76 John Freeman
225 83 John Freeman
Also, a record of the FHiCL documents sent to the artdaq processes, the configuration file used to control DAQInterface, and some further information will have been saved; as of this writing (11/12/14) the directory in which this can be found defaults to /data/lbnedaq/scratch/jcfree/TemporarySaveArea/<run number>, although as you might imagine the plan is to eventually change this directory. 
226 83 John Freeman
** PLEASE NOTE that there may be slight differences between the saved FHiCL documents and the FHiCL documents specified in the DAQInterface configuration file and/or provided by the choice of configuration. The saved FHiCL document name is standardized to <processtype>_<host>_<port>_r<run number>.fcl, so, e.g, "Aggregator_lbnedaq2_5266_r192.fcl" would be the saved name of /data/lbnedaq/fcl/Aggregator_lbnedaq2_2.fcl, listed in the example DAQInterface configuration file above, assuming datataking was performed in run 192. 
227 1 John Freeman
** More importantly, the FHiCL document actually sent to the artdaq process may be slightly different than the FHiCL document provided for DAQInterface; this is because DAQInterface performs some bookkeeping on FHiCL variables which account for things such as the number of processes of a given type (note that it makes no changes which would affect the physics). It is this post-bookkeeping FHiCL document which actually gets sent to the processes which gets saved to the output directory. 
228 72 John Freeman
** The "further information" mentioned above is stored in a file of the form "metadata_r<run number>.txt"; it includes the configuration chosen for the run, the components used, as well as the commit hashes for the lbne-artdaq, lbnerc, and configuration directory used. E.g.,
229 72 John Freeman
<pre>
230 72 John Freeman
Config name: demo
231 72 John Freeman
Component #0: component01
232 72 John Freeman
Component #1: component02
233 72 John Freeman
lbne-artdaq commit: 13b523181a6f8ff6e78ede590d6372ed6193c79c
234 1 John Freeman
lbnerc commit: 288001cf015e1a763dbba482923fc7ac8f379ae6
235 1 John Freeman
/data/lbnedaq/config commit: 877e43fe3ad96991adf5d57dbfbdefb6300fde25
236 1 John Freeman
</pre>
237 76 John Freeman
238 81 John Freeman
h3. Output of the Art modules
239 76 John Freeman
240 81 John Freeman
Various Art modules may create various types of output. In particular, it's standard for one of the two AggregatorMains running in an artdaq-based DAQ to use Art's RootOutput module, which will save the assembled raw event in an Art-readable *.root file. The location of this output can be found in the FHiCL code used to control RootOutput. The other AggregatorMain typically will run other RootOutput modules designed to create plots, diagnostic printouts, etc.; the nature of the output here is too varied to neatly summarize, but checking the FHiCL code used to control these Art modules should reveal their output location.
241 76 John Freeman
242 76 John Freeman
To take a quick look at the Art-readable *.root file, with a version of lbne-artdaq newer than 11/25/14, you can do the following:
243 76 John Freeman
244 76 John Freeman
<pre>
245 76 John Freeman
cd <lbne-artdaq basedir>
246 76 John Freeman
source setupLBNEARTDAQ
247 76 John Freeman
rawEventDump -s <rootfile> -n <max events>
248 76 John Freeman
</pre>
249 76 John Freeman
250 76 John Freeman
where here, <lbne-artdaq basedir> is the parent directory of the lbne-artdaq package, <rootfile> is the Art-readable *.root file produced in a given run, and <max events> is the max events whose info you wish to look at. The output of this command will look something like the following:
251 76 John Freeman
252 76 John Freeman
<pre>
253 81 John Freeman
%MSG-i MF_INIT_OK:  art 01-Dec-2014 16:13:59 CST JobSetup 
254 76 John Freeman
Messagelogger initialization complete.
255 76 John Freeman
%MSG
256 81 John Freeman
%MSG-i PathConfiguration:  art 01-Dec-2014 16:14:00 CST JobSetup 
257 76 John Freeman
Multiple end paths have been combined into one end path,
258 76 John Freeman
"end_path" since order is irrelevant.
259 76 John Freeman
260 76 John Freeman
%MSG
261 81 John Freeman
01-Dec-2014 16:14:00 CST  Initiating request to open file /tmp/lbne35t_r000270_sr01_20141201T221127.root
262 81 John Freeman
01-Dec-2014 16:14:00 CST  Successfully opened file /tmp/lbne35t_r000270_sr01_20141201T221127.root
263 1 John Freeman
--------------------------------------------------------------
264 76 John Freeman
Package             |Version             |Timestamp           
265 81 John Freeman
artdaq-core         |v1_04_06            |01-Dec-2014 21:59:51 UTC
266 81 John Freeman
artdaq              |v1_12_04            |01-Dec-2014 22:01:57 UTC
267 81 John Freeman
lbne-artdaq         |v0_00_08            |01-Dec-2014 22:00:18 UTC
268 81 John Freeman
lbne-artdaq         |v0_07_00            |01-Dec-2014 22:02:57 UTC
269 76 John Freeman
--------------------------------------------------------------
270 81 John Freeman
Begin processing the 1st record. run: 270 subRun: 1 event: 1 at 01-Dec-2014 16:14:00 CST
271 76 John Freeman
PROCESS NAME | MODULE LABEL.. | PRODUCT INSTANCE NAME | DATA PRODUCT TYPE............ | PRODUCT FRIENDLY TYPE | SIZE
272 81 John Freeman
DAQ......... | daq........... | TOY1................. | std::vector<artdaq::Fragment> | artdaq::Fragments.... | ...2
273 1 John Freeman
DAQAG....... | TriggerResults | ..................... | art::TriggerResults.......... | art::TriggerResults.. | ...-
274 76 John Freeman
275 81 John Freeman
Total products (present, not present): 8 (2, 6).
276 76 John Freeman
277 1 John Freeman
PROCESS NAME | MODULE LABEL | PRODUCT INSTANCE NAME | DATA PRODUCT TYPE.................... | PRODUCT FRIENDLY TYPE.... | SIZE
278 76 John Freeman
DAQAG....... | BuildInfo... | LbneArtdaq........... | std::vector<artdaq::PackageBuildInfo> | artdaq::PackageBuildInfos | ...4
279 76 John Freeman
280 76 John Freeman
Total products (present, not present): 1 (1, 0).
281 76 John Freeman
282 81 John Freeman
01-Dec-2014 16:14:00 CST  Closed file /tmp/lbne35t_r000270_sr01_20141201T221127.root
283 76 John Freeman
284 76 John Freeman
TrigReport ---------- Event  Summary ------------
285 76 John Freeman
TrigReport Events total = 1 passed = 1 failed = 0
286 76 John Freeman
287 76 John Freeman
TrigReport ------ Modules in End-Path: end_path ------------
288 76 John Freeman
TrigReport  Trig Bit#    Visited     Passed     Failed      Error Name
289 76 John Freeman
TrigReport     0    0          1          1          0          0 printBuildInfo
290 76 John Freeman
TrigReport     0    0          1          1          0          0 out1
291 76 John Freeman
292 76 John Freeman
TimeReport ---------- Time  Summary ---[sec]----
293 81 John Freeman
TimeReport CPU = 0.003361 Real = 0.003000
294 76 John Freeman
295 76 John Freeman
Art has completed and will exit with status 0.
296 76 John Freeman
</pre>
297 81 John Freeman
The first thing you see here is the version and build time of the lbne-artdaq package and some of the main packages on which it depends. Then you see a listing of products in the root file, here including two fragments of type TOY1, produced by the ToySimulator fragment generator. Finally, a listing of passed events; the output here is the result of running with "-n 1" as an option, so as we'd expect there's only one event.
298 1 John Freeman
299 84 John Freeman
h1. Configuring DAQInterface: the DAQInterface configuration file
300 49 Erik Blaufuss
301 83 John Freeman
DAQInterface has some key information stored in a local configuration file (location and ports for EventBuilders, Aggregators, location of artDAQ, log level, etc). These can be changed while DAQInterface is not running,  It's expected that for normal operations, these should not need to changed too often. Assuming the processes aren't running, before getting started, take a look at the default configuration file, found in docs/config.txt (relative to /data/lbnedaq/scratch/DAQInterface/lbnerc). 
302 49 Erik Blaufuss
It should look something like the following:
303 1 John Freeman
<pre>
304 49 Erik Blaufuss
lbne-artdaq: /data/lbnedaq/scratch/DAQInterface/build_lbne-artdaq
305 1 John Freeman
306 49 Erik Blaufuss
PMT host: lbnedaq3
307 49 Erik Blaufuss
308 49 Erik Blaufuss
pause before initialization: 5
309 49 Erik Blaufuss
310 49 Erik Blaufuss
# debug level can range from 0 to 3 (increasing order of verbosity)
311 49 Erik Blaufuss
debug level: 1
312 49 Erik Blaufuss
313 49 Erik Blaufuss
log directory:   /data/lbnedaq/daqlogs
314 49 Erik Blaufuss
315 49 Erik Blaufuss
record directory: /data/lbnedaq/scratch/jcfree/TemporarySaveArea/
316 49 Erik Blaufuss
317 1 John Freeman
 EventBuilder host: lbnedaq2
318 48 John Freeman
 EventBuilder port: 5235
319 48 John Freeman
 EventBuilder fhicl: /data/lbnedaq/fcl/EventBuilder_demo1.fcl
320 48 John Freeman
321 48 John Freeman
 EventBuilder host: lbnedaq2
322 48 John Freeman
 EventBuilder port: 5236
323 48 John Freeman
 EventBuilder fhicl: /data/lbnedaq/fcl/EventBuilder_demo2.fcl
324 48 John Freeman
325 48 John Freeman
 Aggregator host: lbnedaq2
326 48 John Freeman
 Aggregator port: 5265
327 41 John Freeman
328 1 John Freeman
 Aggregator host: lbnedaq2
329 21 John Freeman
 Aggregator port: 5266
330 49 Erik Blaufuss
</pre>
331 1 John Freeman
332 49 Erik Blaufuss
The "lbne-artdaq" parameter allows the user to set the directory in which the desired build of lbne-artdaq to use is located, the "PMT host" parameter is the host on which artdaq's process management tool script (pmt.rb, used by DAQInterface to launch and kill the artdaq processes) will run, and "log directory" is the directory to which lbne-artdaq's output will be sent. The "debug level" parameter allows the user to set the verbosity level of the output to the screen; setting it to higher values creates greater verbosity, and as a practical matter, the range of settings is currently 0-3. Loosely speaking, "0" means minimal output (not much beyond simply announcing a transition is complete), "1" includes announcements of progress during transitions, "2" includes these announcements plus the values of certain variables as well as lbne-artdaq output, and "3" is primarily of developer interest. The "pause before initialization" parameter allows the user to set a pause, in seconds, between when the artdaq processes start and when they're initialized; it has been observed that a latency of a few seconds is needed for initialization to proceed correctly (though this is not always the case -- on lbne35t-gateway01, with a high setting for "debug level", a pause is not needed; the reason why "debug level" matters in this context is not yet understood).
333 49 Erik Blaufuss
334 53 John Freeman
After these individual parameters, one defines the EventBuilderMain and AggregatorMain artdaq processes. Specifically, an EventBuilderMain is defined in three lines, where each line should contain "EventBuilder", and define the host and port on which the EventBuilderMain will run (to run an artdaq process on the same host as you're on, use "localhost") as well as the FHiCL document used to initialize the EventBuilderMain. AggregatorMain is defined similarly, using the token "Aggregator", but without the FHiCL document supplied, as this is supplied by the choice of configuration in the configuration manager. Best practice is to place the EventBuilderMain's FHiCL documents in the /data/lbnedaq/fcl directory. Please note that the order of processes matters, and that they should be listed front-end to back-end, i.e., EventBuilders should appear before Aggregators.
335 49 Erik Blaufuss
336 57 John Freeman
h1. Adding new configurations to RunControl
337 57 John Freeman
338 68 John Freeman
Adding a new configuration selectable from RunControl involves two steps: creating a directory with the desired name of the configuration which contains the desired FHiCL documents, and then committing that directory to the git repository. 
339 68 John Freeman
340 68 John Freeman
As of 11/20/14, the FHiCL documents associated with a given configuration are stored within the directory
341 57 John Freeman
<pre>
342 57 John Freeman
/data/lbnedaq/config/<named_configuration>
343 57 John Freeman
</pre>
344 57 John Freeman
where "named_configuration" would be the name of the configuration, in this example. Within this directory, the following files are expected:
345 57 John Freeman
* Aggregator1.fcl and Aggregator2.fcl, used to initialize the two AggregatorMain processes in the DAQ system
346 57 John Freeman
* <named_component>_hw_cfg.fcl, used to initialize the BoardReaderMain process running the fragment generator associated with detector component "named_component". Note that there can be any number of such files associated with a configuration, as long as a given component is registered to RunControl (see below, "Adding new DAQ Components to RunControl")
347 59 John Freeman
348 59 John Freeman
There are existing examples of configurations currently within /data/lbnedaq/config which can be studied (and even copied) for further guidance; however, please disregard the "tmp1" and "tmp2" configurations. Note that the FHiCL documents in these directories contain some variables which are set to "PLACEHOLDER", e.g.
349 59 John Freeman
<pre>
350 1 John Freeman
 event_builder_count: PLACEHOLDER
351 59 John Freeman
</pre>
352 68 John Freeman
Note that this is not legal FHiCL, but that DAQInterface will substitute in the appropriate value before using the FHiCL document to initialize an artdaq process; here, for example, it would replace "PLACEHOLDER" with the actual number of EventBuilderMain processes being run.
353 1 John Freeman
354 68 John Freeman
Once you've added a new configuration to /data/lbnedaq/config, you'll need to perform a git commit. Essentially,  /data/lbnedaq/config is not merely a collection of directories naming configurations, but also a git repository. In fact, if you run
355 68 John Freeman
<pre>
356 68 John Freeman
git log
357 68 John Freeman
</pre>
358 68 John Freeman
you'll see a history of the commits made to the repository. In order to commit the directory, a couple of steps need to be taken:
359 68 John Freeman
* From /data/lbnedaq/config/, run <pre>git add <named_configuration></pre>. This will "stage" the directory to be committed. Running <pre>git status</pre> should show you something like the following:
360 68 John Freeman
<pre>
361 68 John Freeman
# On branch master
362 68 John Freeman
# Changes to be committed:
363 68 John Freeman
#   (use "git reset HEAD <file>..." to unstage)
364 68 John Freeman
#
365 68 John Freeman
#	new file:   helloworld/Aggregator1.fcl
366 68 John Freeman
#	new file:   helloworld/Aggregator2.fcl
367 68 John Freeman
#	new file:   helloworld/component01_hw_cfg.fcl
368 68 John Freeman
#	new file:   helloworld/component02_hw_cfg.fcl
369 68 John Freeman
#
370 68 John Freeman
</pre>
371 68 John Freeman
* Next, run <pre>git commit -m "<commit message>"</pre>. The commit message should be your three initials followed by a colon, the name of the configuration followed by a colon, and then a brief description of the new configuration, including its name, e.g.:
372 68 John Freeman
<pre>
373 68 John Freeman
git commit -m "JCF: helloworld: This configuration does not exist in the actual repo, it's simply used for documentation purposes"
374 68 John Freeman
</pre>
375 68 John Freeman
Be aware of rules governing strings delimited by double quotes in bash -- i.e., don't try double quoting a word or phrase inside of your commit description. 
376 68 John Freeman
</pre>
377 68 John Freeman
Now, make sure that the commit took place correctly by running
378 68 John Freeman
<pre>
379 68 John Freeman
git diff HEAD
380 68 John Freeman
</pre>
381 68 John Freeman
If your commit is at the head of the master branch, you should see no output; additionally, if you run
382 1 John Freeman
<pre>
383 68 John Freeman
git log
384 68 John Freeman
</pre>
385 69 John Freeman
you should be able to see your commit at the top.
386 57 John Freeman
387 79 John Freeman
* Finally, make sure to push your change to the central repository; to do this, simply execute
388 79 John Freeman
<pre>
389 79 John Freeman
git push origin
390 79 John Freeman
</pre>
391 79 John Freeman
392 79 John Freeman
and now, if you run 
393 79 John Freeman
394 79 John Freeman
<pre>
395 79 John Freeman
git diff origin/master
396 79 John Freeman
</pre>
397 79 John Freeman
398 79 John Freeman
you should again see no output. Pushing to the central repository is important as this is essentially the backup area for configurations; if a user accidentally overwrites something in /data/lbnedaq/config, as long as commits have been pushed to the central repository there will still be a saved record of configurations before the overwrites took place. 
399 79 John Freeman
400 56 Erik Blaufuss
h1. Adding new DAQ Components to RunControl
401 49 Erik Blaufuss
402 49 Erik Blaufuss
The list of available DAQComponents (maps to BoardReader processes) is maintained by RunControl in the file:
403 49 Erik Blaufuss
<pre>
404 49 Erik Blaufuss
/home/lbnedaq/.lbnerc-components
405 18 John Freeman
</pre>
406 55 Erik Blaufuss
Each entry (name: host port) defines:
407 55 Erik Blaufuss
* name - name of the component, maps to a <name>_hw_cfg.fcl in CfgMgr's configuration directory
408 49 Erik Blaufuss
* host - hostname where BoardReader process will be started
409 49 Erik Blaufuss
* port - XMLRPC port to be used, must be unique and used by other processes.
410 18 John Freeman
411 49 Erik Blaufuss
For example:
412 49 Erik Blaufuss
<pre>
413 49 Erik Blaufuss
component01: lbnedaq2 5205
414 49 Erik Blaufuss
component02: lbnedaq2 5206
415 49 Erik Blaufuss
</pre>
416 49 Erik Blaufuss
Has two components (component01 and component02) both running on lbnedaq2 on ports 5205 and 5206.
417 27 John Freeman
418 49 Erik Blaufuss
h1.  Troubleshooting and FAQ
419 28 John Freeman
420 49 Erik Blaufuss
h2.  Common RunControl issues
421 27 John Freeman
422 49 Erik Blaufuss
h3. How can I get a list of all RunControl commands?
423 1 John Freeman
424 49 Erik Blaufuss
<pre>
425 49 Erik Blaufuss
lbnecmd help
426 49 Erik Blaufuss
</pre>
427 50 Erik Blaufuss
will list all available commands for RunControl with some details for help.  
428 50 Erik Blaufuss
 
429 50 Erik Blaufuss
h3.  No real configurations are listed by RunControl
430 45 John Freeman
431 49 Erik Blaufuss
If you run "lbnecmd listconfigs" and see something like:
432 45 John Freeman
<pre>
433 49 Erik Blaufuss
Available configs (Name : description)
434 49 Erik Blaufuss
435 49 Erik Blaufuss
dummy : Dummy description
436 45 John Freeman
</pre>
437 49 Erik Blaufuss
Instead of your expected configurations, RunControl is not able to connect to CfgMgr.  Please make sure it's running (https://cdcvs.fnal.gov/redmine/projects/fhicl_cfgmgr/wiki/Wiki)
438 1 John Freeman
439 49 Erik Blaufuss
h2.  Common DAQInterface issues
440 49 Erik Blaufuss
441 49 Erik Blaufuss
h3.  *Error handling*
442 49 Erik Blaufuss
443 49 Erik Blaufuss
As of this writing (11/14/14) certain potential problems have been anticipated and are handled within DAQInterface. These problems include:
444 49 Erik Blaufuss
# An artdaq process returns an error state after a transition request, or an exception is thrown by the XML-RPC library during the request
445 49 Erik Blaufuss
# During periodic checks, one or more artdaq processes expected to exist are not found
446 49 Erik Blaufuss
447 49 Erik Blaufuss
In either case, an error is reported via 0MQ to RunControl, and the "Recover" transition is automatically triggered. This transition is a fairly blunt instrument: it will kill any remaining artdaq processes and return DAQInterface to its original state of "stopped" (i.e., one in which it requires the "init" transition before anything else is done). 
448 49 Erik Blaufuss
449 84 John Freeman
h3. *Your change to the DAQInterface configuration file or the daqinterface.py code doesn't seem to do anything*
450 49 Erik Blaufuss
451 1 John Freeman
Make sure you kill the existing daqinterface process and restart it
452 49 Erik Blaufuss
453 54 John Freeman
h3. *On the initial transition ("lbnecmd init daq"), you see "error: [Errno 111] Connection refused"*
454 49 Erik Blaufuss
455 84 John Freeman
If a "Recover" is triggered and you can see via "lbnecmd check" that DAQInterface is in the "stopped" state, try initializing again. If that doesn't work, you can try increasing the value of the "pause before initialization" variable in the DAQInterface configuration file. Empirically, it appears there needs to be a pause of at least 4 seconds on lbnedaqtest01.fnal.gov before the FHiCL documents can be successfully sent via XML-RPC to the processes; increasing this value may make it less likely that the "Connection refused" error occurs.
456 54 John Freeman
457 49 Erik Blaufuss
h3. *On the initial transition, you see a regularly updating printout saying "Waiting for all processes to be launched"*
458 1 John Freeman
459 1 John Freeman
Seeing one or two of these is fine. If, after several seconds, something like the following
460 1 John Freeman
<pre>
461 1 John Freeman
Waiting for all processes to be launched; if zombie pmt.rb is running on localhost please kill it and this program (PID 31820)
462 1 John Freeman
</pre>
463 1 John Freeman
keeps getting output to screen, it means there's a problem initializing. In this case, the current (11/12/14) course of action is to externally kill DAQInterface using the PID listed; also, it's possible that there may already be a pmt.rb executable running on the desired host, blocking the launch of a new one due to a port conflict, in which case you should log onto the host (assuming you're not already on it), and run 
464 1 John Freeman
<pre>
465 1 John Freeman
ps aux | grep -v grep | grep pmt.rb 
466 51 John Freeman
</pre>
467 84 John Freeman
to see if this is the case. If it's not and you can't think of what might be wrong (is the configuration manager running? have you double-checked the DAQInterface configuration file?), then try increasing the debug level in the DAQInterface configuration file for your next run-through, as this will likely shed light on the nature of the problem.
468 77 John Freeman
469 77 John Freeman
h3. *Regardless of how high the debug level is set to, you don't see any output to screen when you issue transitions to DAQInterface*
470 1 John Freeman
471 79 John Freeman
Chances are that DAQInterface was started in another terminal, and consequently, it's in that terminal where output will appear. This issue can be circumvented by redirecting DAQInterface output into a file; how this can be accomplished is described elsewhere in this document.