<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I’m currently working on an implementation of a general PetscStream object. Currently it only supports Vector ops and has a proof of concept KSPCG, but should be extensible to other objects when finished. Junchao is also indirectly working on pipeline support in his NVSHMEM MR. Take a look at either MR, it would be very useful to get your input, as tailoring either of these approaches for pipelined algorithms is key.<div class=""><br class=""><div class="">
<div dir="auto" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div>Best regards,<br class=""><br class="">Jacob Faibussowitsch<br class="">(Jacob Fai - booss - oh - vitch)<br class="">Cell: (312) 694-3391</div></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Jan 9, 2021, at 15:01, Mark Adams <<a href="mailto:mfadams@lbl.gov" class="">mfadams@lbl.gov</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">I would like to put a non-overlapping ASM solve on the GPU. It's not clear that we have a model for this. <div class=""><br class=""></div><div class="">PCApply_ASM currently pipelines the scater with the subdomain solves. I think we would want to change this and do a 1) scatter begin loop, 2) scatter end and non-blocking solve loop, 3) solve-wait and scatter begging loop and 4) scatter end loop.<br class=""></div><div class=""><br class=""></div><div class="">I'm not sure how to go about doing this.</div><div class=""> * Should we make a new PCApply_ASM_PARALLEL or dump this pipelining algorithm and rewrite PCApply_ASM?</div><div class=""> * Add a solver-wait method to KSP?</div><div class=""><br class=""></div><div class="">Thoughts?</div><div class=""><br class=""></div><div class="">Mark</div></div>
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