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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think that the idea is for the reviewers to check the text for
any mistakes and compatibility with the existing text, rather than check for
the validity of the proposal. The later as I recall is left for the MPI forum
assembly.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>As for your question, I’m sure that you can answer it
yourself. </span><span style='font-size:11.0pt;font-family:Wingdings;
color:#1F497D'>J</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> If the memory is still also mapped to the original process (as
with shared memory) that everything is fine. If the memory is removed from the
original process, than the app will get an access-violation fault.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(if this system works on a page boundary, to take this action it
needs to make sure that there are no other allocation on the same page)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>.Erez<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mpi-22-bounces@lists.mpi-forum.org [mailto:mpi-22-bounces@lists.mpi-forum.org] <b>On
Behalf Of </b>Supalov, Alexander<br>
<b>Sent:</b> Friday, December 05, 2008 2:05 PM<br>
<b>To:</b> MPI 2.2<br>
<b>Subject:</b> Re: [Mpi-22] please review - Send Buffer Access (ticket #45)<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Hi,</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>I'd like to review this proposal. Let's consider the following
scenario:</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>- In the MPI_Isend, MPI maps the send buffer into the address space
of the receiving process.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>- In the matching MPI_Recv, the receiving process makes a copy of
the mapped send buffer into the receive buffer.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>- Once the copy is complete, the send buffer is mapped back into
the sender address space during the wait/test call.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>What will happen one tries to access the send buffer in between?</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Best regards.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Alexander</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> mpi-22-bounces@lists.mpi-forum.org
[mailto:mpi-22-bounces@lists.mpi-forum.org] <b>On Behalf Of </b>Erez Haba<br>
<b>Sent:</b> Friday, December 05, 2008 10:48 PM<br>
<b>To:</b> MPI 2.2<br>
<b>Subject:</b> [Mpi-22] please review - Send Buffer Access (ticket #45)</span><o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>This
proposal has passed 1</span><sup><span style='font-size:7.5pt;font-family:"Calibri","sans-serif"'>st</span></sup><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> voting and needs
reviewers. We need 3 <u>volunteers</u> to sign-off on this proposal, plus
the 3 chapter authors to sign-off on the text.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>The
Chapter Authors for<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Chapter
3: Point-to-Point Communication<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Chapter
5: Collective Communication<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Chapter
11: One-Sided Communication<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Please
add a comment to the ticket saying that you reviewed the proposal, or please
send me your comments.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Send
Buffer Access: <a href="https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/45">https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/45</a><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Thanks,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>.Erez<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p>
</div>
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