Project

General

Profile

Running DAQ Interface » History » Version 101

John Freeman, 02/08/2015 02:22 PM

1 58 John Freeman
{{toc}}
2 58 John Freeman
3 96 John Freeman
!DAQ_communication_diagram4.png!
4 96 John Freeman
5 49 Erik Blaufuss
h1. Getting help
6 1 John Freeman
7 78 John Freeman
If, after reading this document (in particular, the "Troubleshooting and FAQ" section) you run into issues, or have questions, please contact:
8 49 Erik Blaufuss
* DAQInterface
9 49 Erik Blaufuss
** John Freeman - jcfree@fnal.gov
10 62 John Freeman
* RunControl
11 49 Erik Blaufuss
** Erik Blaufuss - blaufuss@icecube.umd.edu
12 66 John Freeman
* Configuration Manager
13 66 John Freeman
** Jon Paley - jpaley@anl.gov
14 1 John Freeman
15 95 John Freeman
16 1 John Freeman
h1. Starting DAQInterface and Run Control
17 1 John Freeman
18 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.
19 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.
20 49 Erik Blaufuss
21 91 John Freeman
The installed code is located at lbne35t-gateway01.fnal.gov:/data/lbnedaq/daqarea/lbnerc. To get started, login and first setup the environment:
22 49 Erik Blaufuss
23 30 John Freeman
<pre>
24 33 John Freeman
ssh lbnedaq@lbne35t-gateway01.fnal.gov
25 91 John Freeman
cd /data/lbnedaq/daqarea
26 1 John Freeman
source fireup
27 1 John Freeman
</pre>
28 1 John Freeman
29 91 John Freeman
This will take you into the /data/lbnedaq/daqarea/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 are, 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:
30 1 John Freeman
31 1 John Freeman
<pre>
32 49 Erik Blaufuss
lbnecmd check
33 1 John Freeman
</pre>
34 1 John Freeman
35 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:
36 49 Erik Blaufuss
<pre>
37 49 Erik Blaufuss
(env)[lbnedaq@lbne35t-gateway01 lbnerc]$ lbnecmd check
38 49 Erik Blaufuss
lbnecontrol: running
39 49 Erik Blaufuss
daqint@localhost:5770 (synchronous): stopped
40 49 Erik Blaufuss
</pre>
41 1 John Freeman
42 73 John Freeman
If RunControl is running, and at some point DAQInterface was running but has since been killed:
43 73 John Freeman
<pre>
44 73 John Freeman
lbnecontrol: running
45 73 John Freeman
daqint@localhost:5770 (synchronous): missing
46 73 John Freeman
</pre>
47 91 John Freeman
(In this case, just restart DAQInterface -- how to do this is described shortly).
48 73 John Freeman
49 49 Erik Blaufuss
If RunControl is not running, you'll see something like:
50 1 John Freeman
<pre>
51 49 Erik Blaufuss
(env)[lbnedaq@lbne35t-gateway01 lbnerc]$ lbnecmd check
52 49 Erik Blaufuss
check failed: '[Errno 111] Connection refused'.  Is lbnecontrol running?
53 1 John Freeman
</pre>
54 1 John Freeman
55 61 John Freeman
To check whether the configuration manager is running, you can simply use Linux commands:
56 61 John Freeman
57 61 John Freeman
<pre>
58 61 John Freeman
ps aux | grep -v grep | grep CfgMgrApp
59 61 John Freeman
</pre>
60 61 John Freeman
61 91 John Freeman
This will either return info on CfgMgrApp (the actual name of the configuration manager 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:
62 71 John Freeman
63 71 John Freeman
<pre>
64 75 John Freeman
ps aux | grep -v grep | egrep -e lbnecontrol -e daqinterface -e CfgMgrApp
65 71 John Freeman
</pre>
66 61 John Freeman
67 1 John Freeman
h3. Starting RunControl
68 49 Erik Blaufuss
69 49 Erik Blaufuss
To start RunControl (after loading environment as above):
70 60 John Freeman
<pre>
71 91 John Freeman
rm /tmp/lbnecontrol.pid  # (This should only be necessary if RunControl software wasn't stopped cleanly)
72 49 Erik Blaufuss
lbnecmd launch
73 49 Erik Blaufuss
</pre>
74 1 John Freeman
75 1 John Freeman
h3. Starting DAQInterface
76 1 John Freeman
77 61 John Freeman
To start DAQInterface (after loading environment as above), the basic command is:
78 1 John Freeman
<pre>
79 82 John Freeman
daqinterface -n daqint -r 5570 -c localhost -H localhost -f <daqinterface file> &
80 1 John Freeman
</pre>
81 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. 
82 82 John Freeman
83 82 John Freeman
If multiple users with different terminals wish to check the DAQ output, it is recommended to try:
84 1 John Freeman
<pre>
85 82 John Freeman
stdbuf -oL daqinterface -n daqint -r 5570 -c localhost -H localhost -f <daqinterface file> >>~/DI.log 2>&1 &
86 1 John Freeman
</pre>
87 91 John Freeman
This will launch daqinterface in the background, with all messages being appended to the bottom of the file ~/DI.log  (The stdbuf -oL prevents buffering of output to the file, so the file should update in real time)
88 82 John Freeman
89 1 John Freeman
h3. Starting the configuration manager
90 1 John Freeman
91 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
92 62 John Freeman
93 61 John Freeman
h3. Forcing cleanup: performing a hard reset of RunControl, DAQInterface and the configuration manager
94 49 Erik Blaufuss
95 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:
96 49 Erik Blaufuss
<pre>
97 80 John Freeman
ps aux | grep -v grep | egrep -e lbnecontrol -e daqinterface -e CfgMgrApp
98 49 Erik Blaufuss
</pre>
99 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:
100 1 John Freeman
<pre>
101 49 Erik Blaufuss
kill <PID>
102 1 John Freeman
</pre>
103 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
104 74 John Freeman
<pre>
105 74 John Freeman
ps aux | grep -v grep | grep pmt.rb
106 74 John Freeman
</pre>
107 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.
108 1 John Freeman
109 61 John Freeman
h1. Configuring and starting Runs
110 1 John Freeman
111 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:
112 49 Erik Blaufuss
<pre>
113 49 Erik Blaufuss
Initialize transition complete; if running DAQInterface in the background, can press <enter> to return to shell prompt
114 61 John Freeman
</pre>
115 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. 
116 1 John Freeman
117 94 John Freeman
h2.  Selecting a run configuration and DAQ components
118 49 Erik Blaufuss
119 1 John Freeman
*Before initializing or starting a DAQ run*, a configuration and set of DAQComponents must be selected.  This is done via RunControl.
120 1 John Freeman
121 49 Erik Blaufuss
h3. List and select a configuration:
122 1 John Freeman
123 62 John Freeman
To see the list of available configurations (queried from the configuration manager):
124 49 Erik Blaufuss
<pre>
125 49 Erik Blaufuss
lbnecmd listconfigs
126 1 John Freeman
</pre>
127 49 Erik Blaufuss
Will return a list of configs:
128 49 Erik Blaufuss
<pre>
129 49 Erik Blaufuss
Available configs (Name : description)
130 1 John Freeman
131 49 Erik Blaufuss
demo : Pithy description
132 49 Erik Blaufuss
tmp1 : Pithy description
133 49 Erik Blaufuss
...
134 30 John Freeman
135 49 Erik Blaufuss
Current selected config: No Config
136 49 Erik Blaufuss
</pre>
137 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:
138 49 Erik Blaufuss
<pre> 
139 49 Erik Blaufuss
lbnecmd setconfig demo
140 1 John Freeman
</pre>
141 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.
142 1 John Freeman
143 49 Erik Blaufuss
h3. List and select DAQ components.
144 1 John Freeman
145 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
146 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.
147 38 John Freeman
148 1 John Freeman
To see the list of available DAQ components:
149 49 Erik Blaufuss
<pre>
150 1 John Freeman
lbnecmd listdaqcomps
151 49 Erik Blaufuss
</pre>
152 62 John Freeman
Will return a list of components available and selected (*Default* is ALL available components), e.g.:
153 1 John Freeman
<pre>
154 49 Erik Blaufuss
{'available': {'component02': ['lbnedaq2', '5206'], 'component01': ['lbnedaq2', '5205']}}
155 49 Erik Blaufuss
{'selected': {'component02': ['lbnedaq2', '5206'], 'component01': ['lbnedaq2', '5205']}}
156 49 Erik Blaufuss
</pre>
157 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:
158 49 Erik Blaufuss
<pre>
159 49 Erik Blaufuss
lbnecmd setdaqcomps component01 component02
160 49 Erik Blaufuss
</pre>
161 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.
162 49 Erik Blaufuss
To change the list of available components, see below.
163 29 John Freeman
164 91 John Freeman
h2. Initializing, starting, stopping and terminating a Run
165 1 John Freeman
166 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:
167 1 John Freeman
<pre>
168 49 Erik Blaufuss
lbnecmd check
169 1 John Freeman
</pre>
170 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.
171 1 John Freeman
172 92 John Freeman
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 documents:
173 1 John Freeman
<pre>
174 1 John Freeman
lbnecmd init daq
175 1 John Freeman
</pre>
176 1 John Freeman
177 49 Erik Blaufuss
Take DAQInterface from the "ready" to the "running" state, in order to begin taking data:
178 29 John Freeman
<pre>
179 1 John Freeman
lbnecmd start daq
180 29 John Freeman
</pre>
181 49 Erik Blaufuss
Note: the current run number is displayed when DAQ is in the running state using the "lbnecmd check" command:
182 49 Erik Blaufuss
<pre>
183 49 Erik Blaufuss
lbnecmd check
184 49 Erik Blaufuss
lbnecontrol: running
185 49 Erik Blaufuss
Run number: 207
186 49 Erik Blaufuss
Run configuration: demo
187 1 John Freeman
188 49 Erik Blaufuss
daqint@localhost:5570 (synchronous): running
189 49 Erik Blaufuss
</pre>
190 49 Erik Blaufuss
191 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:
192 22 John Freeman
<pre>
193 21 John Freeman
lbnecmd pause daq
194 42 John Freeman
</pre>
195 41 John Freeman
196 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:
197 48 John Freeman
<pre>
198 48 John Freeman
lbnecmd resume daq
199 48 John Freeman
</pre>
200 48 John Freeman
201 48 John Freeman
Halt the running of the DAQ, returning DAQInterface to the "ready" state from the "running" state:
202 48 John Freeman
<pre>
203 48 John Freeman
lbnecmd stop daq
204 49 Erik Blaufuss
</pre>
205 49 Erik Blaufuss
From the ready state, you can start a new run with the same configuration and DAQ components you originally selected. 
206 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:
207 1 John Freeman
208 1 John Freeman
<pre>
209 1 John Freeman
lbnecmd terminate daq
210 1 John Freeman
</pre>
211 67 Erik Blaufuss
212 67 Erik Blaufuss
If you want to stop all RunControl processes (known as "lbnecontrol"):
213 67 Erik Blaufuss
<pre>
214 67 Erik Blaufuss
lbnecmd kill
215 67 Erik Blaufuss
</pre>
216 67 Erik Blaufuss
After this, you will need to relaunch RunControl as above.
217 1 John Freeman
218 49 Erik Blaufuss
h2. After your DAQ run.
219 1 John Freeman
220 49 Erik Blaufuss
Once you've completed your run, there are a few things you can look at. 
221 48 John Freeman
222 76 John Freeman
h3. The DAQ log
223 76 John Freeman
224 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/. 
225 76 John Freeman
226 76 John Freeman
h3. The run record
227 76 John Freeman
228 91 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 (12/3/14) the directory in which this can be found defaults to /data/lbnedaq/run_records/<run number>. 
229 92 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 (those that control the EventBuilderMain processes) and the run configuration (those that control the BoardReaderMain and AggregatorMain processes). The saved FHiCL document name is standardized to <processtype>_<host>_<port>_r<run number>.fcl, so, e.g, "EventBuilder_lbnedaq2_5235_r286.fcl" would be the saved name of /data/lbnedaq/fcl/EventBuilder_demo1.fcl, listed in the example DAQInterface configuration file above, assuming datataking was performed in run 286. 
230 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. 
231 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.,
232 72 John Freeman
<pre>
233 72 John Freeman
Config name: demo
234 72 John Freeman
Component #0: component01
235 72 John Freeman
Component #1: component02
236 72 John Freeman
lbne-artdaq commit: 13b523181a6f8ff6e78ede590d6372ed6193c79c
237 1 John Freeman
lbnerc commit: 288001cf015e1a763dbba482923fc7ac8f379ae6
238 1 John Freeman
/data/lbnedaq/config commit: 877e43fe3ad96991adf5d57dbfbdefb6300fde25
239 1 John Freeman
</pre>
240 76 John Freeman
241 81 John Freeman
h3. Output of the Art modules
242 76 John Freeman
243 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.
244 76 John Freeman
245 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:
246 76 John Freeman
247 76 John Freeman
<pre>
248 76 John Freeman
cd <lbne-artdaq basedir>
249 76 John Freeman
source setupLBNEARTDAQ
250 76 John Freeman
rawEventDump -s <rootfile> -n <max events>
251 76 John Freeman
</pre>
252 76 John Freeman
253 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:
254 76 John Freeman
255 76 John Freeman
<pre>
256 81 John Freeman
%MSG-i MF_INIT_OK:  art 01-Dec-2014 16:13:59 CST JobSetup 
257 76 John Freeman
Messagelogger initialization complete.
258 76 John Freeman
%MSG
259 81 John Freeman
%MSG-i PathConfiguration:  art 01-Dec-2014 16:14:00 CST JobSetup 
260 76 John Freeman
Multiple end paths have been combined into one end path,
261 76 John Freeman
"end_path" since order is irrelevant.
262 76 John Freeman
263 76 John Freeman
%MSG
264 81 John Freeman
01-Dec-2014 16:14:00 CST  Initiating request to open file /tmp/lbne35t_r000270_sr01_20141201T221127.root
265 81 John Freeman
01-Dec-2014 16:14:00 CST  Successfully opened file /tmp/lbne35t_r000270_sr01_20141201T221127.root
266 1 John Freeman
--------------------------------------------------------------
267 76 John Freeman
Package             |Version             |Timestamp           
268 81 John Freeman
artdaq-core         |v1_04_06            |01-Dec-2014 21:59:51 UTC
269 81 John Freeman
artdaq              |v1_12_04            |01-Dec-2014 22:01:57 UTC
270 81 John Freeman
lbne-artdaq         |v0_00_08            |01-Dec-2014 22:00:18 UTC
271 81 John Freeman
lbne-artdaq         |v0_07_00            |01-Dec-2014 22:02:57 UTC
272 76 John Freeman
--------------------------------------------------------------
273 81 John Freeman
Begin processing the 1st record. run: 270 subRun: 1 event: 1 at 01-Dec-2014 16:14:00 CST
274 76 John Freeman
PROCESS NAME | MODULE LABEL.. | PRODUCT INSTANCE NAME | DATA PRODUCT TYPE............ | PRODUCT FRIENDLY TYPE | SIZE
275 81 John Freeman
DAQ......... | daq........... | TOY1................. | std::vector<artdaq::Fragment> | artdaq::Fragments.... | ...2
276 1 John Freeman
DAQAG....... | TriggerResults | ..................... | art::TriggerResults.......... | art::TriggerResults.. | ...-
277 76 John Freeman
278 81 John Freeman
Total products (present, not present): 8 (2, 6).
279 76 John Freeman
280 1 John Freeman
PROCESS NAME | MODULE LABEL | PRODUCT INSTANCE NAME | DATA PRODUCT TYPE.................... | PRODUCT FRIENDLY TYPE.... | SIZE
281 76 John Freeman
DAQAG....... | BuildInfo... | LbneArtdaq........... | std::vector<artdaq::PackageBuildInfo> | artdaq::PackageBuildInfos | ...4
282 76 John Freeman
283 76 John Freeman
Total products (present, not present): 1 (1, 0).
284 76 John Freeman
285 81 John Freeman
01-Dec-2014 16:14:00 CST  Closed file /tmp/lbne35t_r000270_sr01_20141201T221127.root
286 76 John Freeman
287 76 John Freeman
TrigReport ---------- Event  Summary ------------
288 76 John Freeman
TrigReport Events total = 1 passed = 1 failed = 0
289 76 John Freeman
290 76 John Freeman
TrigReport ------ Modules in End-Path: end_path ------------
291 76 John Freeman
TrigReport  Trig Bit#    Visited     Passed     Failed      Error Name
292 76 John Freeman
TrigReport     0    0          1          1          0          0 printBuildInfo
293 76 John Freeman
TrigReport     0    0          1          1          0          0 out1
294 76 John Freeman
295 76 John Freeman
TimeReport ---------- Time  Summary ---[sec]----
296 1 John Freeman
TimeReport CPU = 0.003361 Real = 0.003000
297 1 John Freeman
298 76 John Freeman
Art has completed and will exit with status 0.
299 76 John Freeman
</pre>
300 76 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.
301 81 John Freeman
302 84 John Freeman
h1. Configuring DAQInterface: the DAQInterface configuration file
303 91 John Freeman
304 92 John Freeman
DAQInterface has some key information stored in a local configuration file, NOT to be confused with the run configuration described elsewhere on this wiki. Examples of this information are  location and ports for artdaq processes, location of lbne-artdaq software, debug (log) level, etc). These can be changed before the DAQInterface process is started. It's expected that for normal operations, these should not need to changed too often, and alterations will be primarily of developer or expert interest. If you ARE a developer/expert or are simply curious, take a look at the default DAQInterface configuration file, found in docs/config.txt (relative to /data/lbnedaq/daqarea/lbnerc); it should look something like the following:
305 1 John Freeman
<pre>
306 1 John Freeman
307 100 John Freeman
lbne-artdaq: /data/lbnedaq/daqarea/lbne-artdaq-base/build_lbne-artdaq
308 91 John Freeman
309 1 John Freeman
PMT host: lbnedaq3
310 100 John Freeman
PMT port: 5400
311 1 John Freeman
312 49 Erik Blaufuss
pause before initialization: 5
313 49 Erik Blaufuss
314 49 Erik Blaufuss
# debug level can range from 0 to 3 (increasing order of verbosity)
315 49 Erik Blaufuss
debug level: 1
316 49 Erik Blaufuss
317 49 Erik Blaufuss
log directory:   /data/lbnedaq/daqlogs
318 49 Erik Blaufuss
319 91 John Freeman
record directory: /data/lbnedaq/run_records
320 49 Erik Blaufuss
321 101 John Freeman
disable configuration check: false
322 101 John Freeman
323 101 John Freeman
TDU XMLRPC port: 0
324 101 John Freeman
325 91 John Freeman
EventBuilder host: lbnedaq2
326 91 John Freeman
EventBuilder port: 5235
327 91 John Freeman
EventBuilder fhicl: /data/lbnedaq/fcl/EventBuilder_demo1.fcl
328 48 John Freeman
329 91 John Freeman
EventBuilder host: lbnedaq2
330 91 John Freeman
EventBuilder port: 5236
331 91 John Freeman
EventBuilder fhicl: /data/lbnedaq/fcl/EventBuilder_demo2.fcl
332 48 John Freeman
333 91 John Freeman
Aggregator host: lbnedaq2
334 91 John Freeman
Aggregator port: 5265
335 48 John Freeman
336 91 John Freeman
Aggregator host: lbnedaq2
337 1 John Freeman
Aggregator port: 5266
338 1 John Freeman
339 1 John Freeman
</pre>
340 1 John Freeman
341 92 John Freeman
The meaning of these parameters is as follows:
342 92 John Freeman
343 92 John Freeman
* *lbne-artdaq* : the directory in which the desired build of lbne-artdaq to use is located
344 92 John Freeman
345 1 John Freeman
* *PMT host* : the host on which artdaq's process management tool script (pmt.rb, used by DAQInterface to launch and kill the artdaq processes) will run
346 100 John Freeman
* *PMT port* : pmt.rb's port
347 92 John Freeman
348 92 John Freeman
* *pause before initialization* : the time in seconds between when the artdaq processes have been created and when they're initialized via FHiCL documents; empirically a pause of 5 seconds seems to be sufficient (less than this an errors can occur; see below in the "Troubleshooting" section for more
349 92 John Freeman
350 92 John Freeman
* *debug level* : 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. 
351 92 John Freeman
352 93 John Freeman
* *log directory* : the directory relative to which lbne-artdaq's pmt/*.log output (a record of what it sent to stdout) will be placed
353 93 John Freeman
354 93 John Freeman
* *record directory* : the directory to which metadata about the run (FHiCL documents used, DAQInterface configuration file used, etc.) gets sent
355 101 John Freeman
356 101 John Freeman
* *disable configuration check* : a boolean which can be set to "true" or "false"; normally this should be set to "false", which means that on the start transition, DAQInterface will intentionally fail and put itself into the "stopped" state if it discovers that edits have been made to the configuration directory since the last commit in that directory. If very frequent edits to the configuration directory are made during hardware debugging, however, switching this feature on to "true" can make life considerably easier. 
357 101 John Freeman
358 101 John Freeman
* *TDU XMLRPC port* : the value of the port through which DAQInterface will communicate with an XML-RPC server linked to the TDU. Needed for DAQInterface to send a sync pulse to the TDU at the beginning of the "start" and "resume" transitions. If this is set to 0 or a negative value, no sync pulse is attempted. For more on the TDU and its code, see Tom Dealtry's Wiki "here":https://cdcvs.fnal.gov/redmine/projects/lbne-daq/wiki/Starting_and_using_TDUControl
359 49 Erik Blaufuss
360 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.
361 49 Erik Blaufuss
362 57 John Freeman
h1. Adding new configurations to RunControl
363 57 John Freeman
364 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. 
365 68 John Freeman
366 91 John Freeman
As of 11/20/14, the FHiCL documents associated with a given configuration are edited within the directory
367 57 John Freeman
<pre>
368 57 John Freeman
/data/lbnedaq/config/<named_configuration>
369 57 John Freeman
</pre>
370 57 John Freeman
where "named_configuration" would be the name of the configuration, in this example. Within this directory, the following files are expected:
371 57 John Freeman
* Aggregator1.fcl and Aggregator2.fcl, used to initialize the two AggregatorMain processes in the DAQ system
372 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")
373 59 John Freeman
374 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.
375 59 John Freeman
<pre>
376 1 John Freeman
 event_builder_count: PLACEHOLDER
377 59 John Freeman
</pre>
378 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.
379 1 John Freeman
380 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
381 68 John Freeman
<pre>
382 68 John Freeman
git log
383 68 John Freeman
</pre>
384 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:
385 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:
386 68 John Freeman
<pre>
387 68 John Freeman
# On branch master
388 68 John Freeman
# Changes to be committed:
389 68 John Freeman
#   (use "git reset HEAD <file>..." to unstage)
390 68 John Freeman
#
391 68 John Freeman
#	new file:   helloworld/Aggregator1.fcl
392 68 John Freeman
#	new file:   helloworld/Aggregator2.fcl
393 68 John Freeman
#	new file:   helloworld/component01_hw_cfg.fcl
394 68 John Freeman
#	new file:   helloworld/component02_hw_cfg.fcl
395 68 John Freeman
#
396 68 John Freeman
</pre>
397 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.:
398 68 John Freeman
<pre>
399 1 John Freeman
git commit -m "JCF: helloworld: This configuration does not exist in the actual repo, it's simply used for documentation purposes"
400 68 John Freeman
</pre>
401 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. 
402 68 John Freeman
</pre>
403 68 John Freeman
Now, make sure that the commit took place correctly by running
404 68 John Freeman
<pre>
405 68 John Freeman
git diff HEAD
406 68 John Freeman
</pre>
407 68 John Freeman
If your commit is at the head of the master branch, you should see no output; additionally, if you run
408 1 John Freeman
<pre>
409 68 John Freeman
git log
410 68 John Freeman
</pre>
411 69 John Freeman
you should be able to see your commit at the top.
412 57 John Freeman
413 79 John Freeman
* Finally, make sure to push your change to the central repository; to do this, simply execute
414 79 John Freeman
<pre>
415 79 John Freeman
git push origin
416 79 John Freeman
</pre>
417 79 John Freeman
418 79 John Freeman
and now, if you run 
419 79 John Freeman
420 79 John Freeman
<pre>
421 79 John Freeman
git diff origin/master
422 79 John Freeman
</pre>
423 79 John Freeman
424 91 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. In fact, as of this writing (12/3/14), if either (A) edits have been made to the /data/lbnedaq/config directory since its most recent commit, or (B) that commit hasn't been pushed to the central repository, DAQInterface will refuse to execute the initialize transition. 
425 79 John Freeman
426 56 Erik Blaufuss
h1. Adding new DAQ Components to RunControl
427 49 Erik Blaufuss
428 49 Erik Blaufuss
The list of available DAQComponents (maps to BoardReader processes) is maintained by RunControl in the file:
429 49 Erik Blaufuss
<pre>
430 49 Erik Blaufuss
/home/lbnedaq/.lbnerc-components
431 18 John Freeman
</pre>
432 55 Erik Blaufuss
Each entry (name: host port) defines:
433 55 Erik Blaufuss
* name - name of the component, maps to a <name>_hw_cfg.fcl in CfgMgr's configuration directory
434 49 Erik Blaufuss
* host - hostname where BoardReader process will be started
435 49 Erik Blaufuss
* port - XMLRPC port to be used, must be unique and used by other processes.
436 18 John Freeman
437 49 Erik Blaufuss
For example:
438 49 Erik Blaufuss
<pre>
439 49 Erik Blaufuss
component01: lbnedaq2 5205
440 49 Erik Blaufuss
component02: lbnedaq2 5206
441 49 Erik Blaufuss
</pre>
442 49 Erik Blaufuss
Has two components (component01 and component02) both running on lbnedaq2 on ports 5205 and 5206.
443 27 John Freeman
444 49 Erik Blaufuss
h1.  Troubleshooting and FAQ
445 28 John Freeman
446 49 Erik Blaufuss
h2.  Common RunControl issues
447 27 John Freeman
448 49 Erik Blaufuss
h3. How can I get a list of all RunControl commands?
449 1 John Freeman
450 49 Erik Blaufuss
<pre>
451 49 Erik Blaufuss
lbnecmd help
452 49 Erik Blaufuss
</pre>
453 50 Erik Blaufuss
will list all available commands for RunControl with some details for help.  
454 50 Erik Blaufuss
 
455 1 John Freeman
h3.  No real configurations are listed by RunControl
456 45 John Freeman
457 49 Erik Blaufuss
If you run "lbnecmd listconfigs" and see something like:
458 45 John Freeman
<pre>
459 49 Erik Blaufuss
Available configs (Name : description)
460 49 Erik Blaufuss
461 49 Erik Blaufuss
dummy : Dummy description
462 45 John Freeman
</pre>
463 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)
464 1 John Freeman
465 49 Erik Blaufuss
h2.  Common DAQInterface issues
466 49 Erik Blaufuss
467 49 Erik Blaufuss
h3.  *Error handling*
468 49 Erik Blaufuss
469 49 Erik Blaufuss
As of this writing (11/14/14) certain potential problems have been anticipated and are handled within DAQInterface. These problems include:
470 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
471 49 Erik Blaufuss
# During periodic checks, one or more artdaq processes expected to exist are not found
472 49 Erik Blaufuss
473 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). 
474 49 Erik Blaufuss
475 84 John Freeman
h3. *Your change to the DAQInterface configuration file or the daqinterface.py code doesn't seem to do anything*
476 49 Erik Blaufuss
477 1 John Freeman
Make sure you kill the existing daqinterface process and restart it
478 49 Erik Blaufuss
479 54 John Freeman
h3. *On the initial transition ("lbnecmd init daq"), you see "error: [Errno 111] Connection refused"*
480 49 Erik Blaufuss
481 91 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 5 seconds 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.
482 54 John Freeman
483 49 Erik Blaufuss
h3. *On the initial transition, you see a regularly updating printout saying "Waiting for all processes to be launched"*
484 1 John Freeman
485 1 John Freeman
Seeing one or two of these is fine. If, after several seconds, something like the following
486 1 John Freeman
<pre>
487 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)
488 1 John Freeman
</pre>
489 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 
490 1 John Freeman
<pre>
491 1 John Freeman
ps aux | grep -v grep | grep pmt.rb 
492 51 John Freeman
</pre>
493 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.
494 77 John Freeman
495 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*
496 1 John Freeman
497 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.