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Please find the minutes below and at <a class="moz-txt-link-freetext" href="http://bit.ly/1SBdCJO">http://bit.ly/1SBdCJO</a> .<br>
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<h1 id="firstHeading" class="firstHeading" style="font-weight:
bold;" lang="en"><span dir="auto">GlueX Offline Meeting, April
13, 2016</span>, Minutes</h1>
<div id="bodyContent" class="mw-body-content"><span
class="mw-headline" id="Minutes"></span>
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<table>
<tbody>
<tr>
<td>There is a<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://bluejeans.com/s/9spN/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">recording of this meeting</a><span
class="Apple-converted-space"> </span>on the
BlueJeans site.
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Present:</p>
<ul style="list-style-type: square;">
<li><b>CMU</b>: Naomi Jarvis, Curtis Meyer, Mike
Staib</li>
<li><b>FIU</b>: Mahmoud Kamel</li>
<li><b>JLab</b>: Mark Ito (chair), Paul Mattione,
Sandy Philpott, Dmitry Romanov, Nathan Sparks,
Justin Stevens, Simon Taylor</li>
<li><b>NU</b>: Sean Dobbs</li>
</ul>
</td>
<td>
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text-align: center; overflow: hidden; padding:
3px !important; width: 202px; background-color:
white;"><a
href="https://halldweb.jlab.org/wiki/index.php/File:Offline_meeting_2016-04-13.png"
class="image" style="color: rgb(85, 34, 0);
padding: 0px !important; text-decoration:
underline; background: transparent;"><img
alt=""
src="cid:part2.07080708.02060506@jlab.org"
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srcset="/wiki/images/thumb/3/35/Offline_meeting_2016-04-13.png/300px-Offline_meeting_2016-04-13.png
1.5x,
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width="200"></a>
<div class="thumbcaption" style="border: none;
text-align: left; line-height: 1.4em;
font-size: 14.1376px; padding: 3px
!important;">Software Meeting</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Announcements">Announcements</span></h3>
<ol>
<li>RCDB News
<ul style="list-style-type: square;">
<li>The C++ API is ready. Dmitry pointed us to the<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/rcdb/wiki/Cpp"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">relevant section of the
RCDB wiki</a>. It requires C++11 to compile.</li>
<li>SQLite versions of the RCDB are now generated
nightly. You can download the latest version from<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external free"
href="https://halldweb.jlab.org/dist/rcdb.sqlite"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;"><a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/dist/rcdb.sqlite">https://halldweb.jlab.org/dist/rcdb.sqlite</a></a><span
class="Apple-converted-space"> </span>.</li>
</ul>
</li>
<li>Collaboration Meeting, May 9-11, 2016. The<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX-Collaboration-May-2016"
title="GlueX-Collaboration-May-2016" style="color:
rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">Collaboration
Meeting Agenda</a><span class="Apple-converted-space"> </span>gives
the offline almost two hours.
<ul style="list-style-type: square;">
<li>Paul will give a talk on monitoring.</li>
<li>Sean will give a talk on calibration.</li>
<li>We will collectively think about other talks.</li>
</ul>
</li>
</ol>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Improved_JANA_Locks">Improved
JANA Locks</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Paul explained the situation.</p>
<ol>
<li>The locks that have been modified are specific to
different "areas" of the code; there is now
differentiation between a special purpose locks and the
global thread lock. The areas are:
<ol>
<li>plugins</li>
<li>actions</li>
<li>factories</li>
</ol>
</li>
<li>The new scheme requires use of a<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://www.jlab.org/JANA/downloads.php"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">new JANA release: 0.7.5</a>.</li>
<li>The crucial change came in with<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://github.com/JeffersonLab/sim-recon/pull/331"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Pull request #331</a>.</li>
<li>Paul sent an<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2016-April/002300.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">email</a><span
class="Apple-converted-space"> </span>on Monday
warning us about the need for use of the new JANA
release.</li>
<li>Mark released a<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2016-April/002303.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">new version of sim-recon</a>,
version 1.11.0, that incorporates these changes.</li>
<li>Paul put together a<span class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/Locking_in_JANA"
title="Locking in JANA" style="color: rgb(85, 34, 0);
padding: 0px !important; text-decoration: underline;
background: transparent;">wiki page</a><span
class="Apple-converted-space"> </span>giving best
practices for using locks with JANA, inspired by the
code he discovered during his review of the locks in our
code.</li>
<li>Paul also showed<span class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2992"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">some slides</a><span
class="Apple-converted-space"> </span>contrasting the
new lock discipline versus the lack thereof showing much
improved multi-thread scaling.</li>
</ol>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="Review_of_minutes_from_March_30">Review
of minutes from March 30</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We went over the<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_30,_2016#Minutes"
title="GlueX Offline Meeting, March 30, 2016"
style="color: rgb(85, 34, 0); padding: 0px !important;
text-decoration: underline; background: transparent;">minutes
from March 30</a>.</p>
<ul style="list-style-type: square;">
<li><b>Future Trends in Nuclear Physics Computing Workshop</b>.
Amber and Mark had a conference call with Richard Jones,
our virtual organization representative, to plan out the
next step in enhancing JLab involvement with the<span
class="Apple-converted-space"> </span><a
rel="nofollow" class="external text"
href="http://www.opensciencegrid.org/" style="color:
inherit !important; padding: 0px !important;
text-decoration: inherit !important; background:
transparent;">Open Science Grid</a>.</li>
<li><b>Access to Fairshare Information from JLab Farm</b>.
We asked Sandy about getting the current fairshare
statistics posted somewhere. She told us that it will be
there on the new webpages that SciComp is working on.
Mark suggested that at some point someone from SciComp
should give presentation to this group about the new
site.</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline"
id="Calibration_Challenge.2FProcessing">Calibration
Challenge/Processing</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Sean presented a<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://halldweb.jlab.org/wiki/images/d/d4/Sdobbs_OfflineMtg_13Apr16.pdf"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">slide</a><span
class="Apple-converted-space"> </span>bringing us
up-to-date with calibration activity.</p>
<ul style="list-style-type: square;">
<li>He described the parameters of the three launches
started so far. One set of statistics not on the slide:</li>
</ul>
<table border="border">
<tbody>
<tr>
<th>Launch Number</th>
<th>Number of Farm Jobs</th>
</tr>
<tr>
<td>1</td>
<td>6,000</td>
</tr>
<tr>
<td>2</td>
<td>3,000</td>
</tr>
<tr>
<td>3</td>
<td>3,500</td>
</tr>
</tbody>
</table>
<ul style="list-style-type: square;">
<li>The CCDB improvements he has discussed with Dmitry
address ease of handling of calibration constants and
possible calibration visualization ideas.</li>
<li>The benchmark jobs are to explore performance as a
function of the number of threads. Sean is hoping that
Paul's recent improvements will help the situation here
as well.</li>
</ul>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="sim-recon_scripts">sim-recon
scripts</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Paul has<span
class="Apple-converted-space"> </span><a
href="https://halldweb.jlab.org/wiki/index.php/Letter_from_Paul_to_Mark"
title="Letter from Paul to Mark" style="color: rgb(85,
34, 0); padding: 0px !important; text-decoration:
underline; background: transparent;">proposed</a><span
class="Apple-converted-space"> </span>moving the scripts
that generate analysis plugin templates from the scripts
directory in the Subversion repository to a new directory
of the sim-recon repository (Git). That way these scripts
will be versioned along with releases of sim-recon. That,
in turn, would disambiguate which version of the scripts
should be used with which version of sim-recon.</p>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We all agreed that this is a good
idea, but Nathan wanted to think about whether there might
be a more appropriate location than that proposed by Paul.
We agreed to let him make an alternate proposal before we
make the move.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="FADC_Emulation_Partial_Re-Write">FADC
Emulation Partial Re-Write</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">We looked at<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://github.com/JeffersonLab/sim-recon/pull/318"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Richard's recent pull request</a>.
The situation seems to be well in hand.</p>
<h3 style="page-break-after: avoid; font-weight: bold;"><span
class="mw-headline" id="SWIF_for_GlueX_Users">SWIF for
GlueX Users</span></h3>
<p style="widows: 3; orphans: 3; margin: 1em 0px;
line-height: 1.2em;">Mahmoud reminded that<span
class="Apple-converted-space"> </span><a rel="nofollow"
class="external text"
href="https://mailman.jlab.org/pipermail/halld-offline/2016-February/002244.html"
style="color: inherit !important; padding: 0px
!important; text-decoration: inherit !important;
background: transparent;">Paul's guide to SWIF for GlueX
Analysis Users</a><span class="Apple-converted-space"> </span>had
been discussed previously. He is using the system himself.</p>
</div>
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