<div dir="ltr">Can this be a "ticket 0" change?</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 29, 2017 at 2:56 PM, Martin Schulz <span dir="ltr"><<a href="mailto:gu58niw@mytum.de" target="_blank">gu58niw@mytum.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space">Hi Dan, all,<div><br></div><div>Just my personal view: the that’s how I always interpreted the statement anyway, but I can see how this could be misinterpreted. Hence, adding the clarification is IMHO a good move.</div><div><br></div><div>Just my 2c,</div><div><br></div><div>Martin</div><div><br></div><div><div><br><blockquote type="cite"><div><div class="h5"><div>On 29. Nov 2017, at 11:07, HOLMES Daniel <<a href="mailto:d.holmes@epcc.ed.ac.uk" target="_blank">d.holmes@epcc.ed.ac.uk</a>> wrote:</div><br class="m_-8863473552613535937Apple-interchange-newline"></div></div><div><div><div class="h5">
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Hi Persistence WG members,
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<div>We have a suggested change to the wording of the MPI Standard text that we will propose to the MPI Forum next week regarding persistent collective operations.</div>
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<blockquote type="cite">Once initialized,<br>
persistent collective operations can be started in any order<br>
independently of initialization order<br>
+and the order can differ among ranks in the communicator<br>
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Most of this sentence already appears in our proposed text - the suggestion is to add the line beginning with “+”.</div>
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<div>I think this is a good suggestion - we should make this point absolutely clear. We should word-smith the exact phrase (e.g. during the meeting later today?) and then include it in our formal reading next week by holding a “no-no” vote.</div>
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<div>Cheers,</div>
</div>
<div>Dan.<br>
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<span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>Subject:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif"><b>Re: [mpi-forum/mpi-standard] Persistent collectives 2017 (#29)</b><br>
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<span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>Date:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">29 November 2017 at 06:09:20 GMT<br>
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<span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>To:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">mpi-forum/mpi-standard <<a href="mailto:mpi-standard@noreply.github.com" target="_blank">mpi-standard@noreply.github.<wbr>com</a>><br>
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<span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>Cc:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">Dan Holmes <<a href="mailto:dholmes@epcc.ed.ac.uk" target="_blank">dholmes@epcc.ed.ac.uk</a>>, Mention <<a href="mailto:mention@noreply.github.com" target="_blank">mention@noreply.github.com</a>><br>
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<span style="font-family:-webkit-system-font,"Helvetica Neue",Helvetica,sans-serif"><b>Reply-To:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">mpi-forum/mpi-standard <<a href="mailto:reply+00c7fc4ac57b95d8d1ec9f0842808776a6bf83a41aa2b15e92cf000000011636110f92a169ce0dd58755@reply.github.com" target="_blank">reply+<wbr>00c7fc4ac57b95d8d1ec9f08428087<wbr>76a6bf83a41aa2b15e92cf00000001<wbr>1636110f92a169ce0dd58755@<wbr>reply.github.com</a>><br>
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<div><p><a href="https://github.com/dholmes-epcc-ed-ac-uk" class="m_-8863473552613535937user-mention" target="_blank">@dholmes-epcc-ed-ac-uk</a>,<br>
With the existing text, I think many people can understand that it is saying (at least) "<em>requests can be started using
<code>MPI_START</code> or <code>MPI_STARTALL</code> in any order independently of initialization order</em>", because of analogy to the point-to-point communication. So I think your suggested text is unnecessary.<br>
But some people may <em>not</em> understand that it is also saying "<em>the order of starting requests can differ among ranks in the communicator</em>", because (1) the matching rule for persistent collective operations is different from the
matching rule for point-to-point communication so that analogy to the point-to-point communication is not applied and (2) the order of nonblocking collective calls must be same among ranks in the communicator.</p><p>How about the sentence below? I'm not good at English. Please correct it if it is not good.</p>
<blockquote><p>Once initialized,<br>
persistent collective operations can be started in any order<br>
independently of initialization order<br>
and the order can differ among ranks in the communicator</p>
</blockquote><p>If anyone else thinks the existing text is sufficient, I won't request the change. Probably my English reading skill is low.</p><p style="font-size:small;color:#666">—<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Anthony Skjellum, PhD<br><a href="mailto:skjellum@gmail.com" target="_blank">skjellum@gmail.com</a><br>Cell: +1-205-807-4968<div><br><div><br></div></div></div></div>
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