https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/INSTRM-1385 Instrument control development <p>The canonexp readout and mcs exposure processing take significantly more time than we want, and can be made more efficient. As it stands a single 0.8s exposure takes more than 10s. From looking at the timings, three obvious improvements are:</p> <ul class="alternate" type="square"> <li>run the canonexp library routines in a permanently running daemon, which can pipe N*0.8s reads to the mcsActor without going to disk.</li> <li>likewise, write the PFSC files in a background process, so that nothing waits on the writes.</li> <li>mask off the non-PFI parts of the image and otherwise tune the background subtraction and centroiding.</li> </ul> <p>This ticket addresses the first of these improvements.</p> INSTRM-1385

Make MCS readouts more efficient: pipe reads to mcsActor w/o going to disk

Task Normal Done Done chyan cloomis EngRun Fri, 8 Oct 2021 14:52:08 +0000 Sun, 21 Nov 2021 06:56:15 +0000 Sun, 21 Nov 2021 06:56:15 +0000 ics_mcsActor 0 3 <p><br/> Canon did not provide the library for the camera, so we just use it 'as it is'. So, the first option is not the feasible path before the e-run. </p> <p>The canonexp.c program can at the very least pipe the output to the caller, right? There should be no file writes between the expose command and the generation of the mcs_data, etc. rows.</p> <p>Chi-Hung requires more time to think about this. This will be fixed at the end of this week or early next week.</p> <p>Discussed with Craig couple hours ago, the current low level calls are not easy to transform with Cython.  This is because the C program deals with shutter and detector readouts.  Also those low level call has to maintain the synchronicity, so that the exposure time will exactly the same.  Using Cython is a ultimate goal to do, but we can use standard output as work around.</p> <p>Branch test on telescope and merged to master.  Now working on for canon 50M.</p> Blocks INSTRM-1414 Duplicate INSTRM-1396 Relates INSTRM-1425 INSTRM-1426 INSTRM-1397 Development Rank 0|zzs2x4: Sprint PreEngRun4 EngRun3Cleanup Story Points 3.0