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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thank you for the PROBLEM-REPORT-FORM.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">I looked for a bit and found no new developments in Linux kernel aio socket support, so the situation has apparently not changed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Your choices are:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">1. Redesign your application to alternate reads and writes; some protocols won’t support this well, but if you can it’s the easiest way.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">2. Change to using Reactor (particularly, ACE_Dev_Poll_Reactor) on Linux, at least.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">3. Write something to emulate aio using reactive mechanisms. There was an effort that did this in ACE quite a few years ago – maybe you can get your hands on that and see if
it could work for you.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">-Steve<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> ace-users [mailto:ace-users-bounces@list.isis.vanderbilt.edu]
<b>On Behalf Of </b>h w<br>
<b>Sent:</b> Tuesday, March 01, 2016 9:45 AM<br>
<b>To:</b> ace-users@list.isis.vanderbilt.edu<br>
<b>Subject:</b> [ace-users] Help ! Porting ACE Proactor Aio application on Linux<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ACE VERSION: 6.3.0<br>
<br>
HOST MACHINE and OPERATING SYSTEM:<br>
Centos 6.7 and Linux kernel 2.6.32-573.12.1.el6.i686<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><br>
THE $ACE_ROOT/ace/config.h <o:p></o:p></p>
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<p class="MsoNormal"> #define ACE_LACKS_GETIPNODEBYADDR<br>
#define ACE_LACKS_GETIPNODEBYNAME<o:p></o:p></p>
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<p class="MsoNormal"> #define ACE_HAS_AIO_CALLS<br>
#include "ace/config-linux.h"<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><br>
THE $ACE_ROOT/include/makeinclude/platform_macros.GNU <o:p></o:p></p>
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<p class="MsoNormal"> include $(ACE_ROOT)/include/makeinclude/platform_linux.GNU<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><br>
CONTENTS OF $ACE_ROOT/bin/MakeProjectCreator/config/default.features<br>
no such file<br>
<br>
AREA/CLASS/EXAMPLE AFFECTED: no<br>
<br>
<br>
DOES THE PROBLEM AFFECT:<br>
COMPILATION? no<br>
LINKING? no<br>
On Unix systems, did you run make realclean first? Yes, I did.<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
SYNOPSIS:<br>
Using ACE Proactor AIO framework on network sockets to exchange messages between two or more endpoints on linux OS. It looked the message read or write blocked or in order.<o:p></o:p></p>
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<p class="MsoNormal"><br>
DESCRIPTION:<o:p></o:p></p>
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<p class="MsoNormal"> I am porting an application into Linux which utilizes ACE proactor AIO framework for a network communication ( read/ write socket ). It works fine on Windows OS. However, on Linux, The application looked like exchange messages
in order, for example, When I tried to send a message to the peer, I found that ACE_POSIX_AIOCB_Proactor did invoke aio_write() but the message did not get sent out util the peer sent a message out, and then got that previous message in. More worse, most
time, when the connector estalished a connection and tried to send the first message, the system got locked up because a read operation probably be put before write operation for listening any incoming messages.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> I searched the issue and found the similar issue report in the link but it was several years age:
<a href="https://stevehuston.wordpress.com/2008/11/25/when-is-it-ok-to-use-ace-proactor-on-linux/" target="_blank">
https://stevehuston.wordpress.com/2008/11/25/when-is-it-ok-to-use-ace-proactor-on-linux/</a><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Is it still the limitation on Linux? Is there any way to get the ACE Proactor AIO work for network communication ( exchange message via socket with full duplex) now? Any help would be greatly appreciated<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><br>
Thanks!<o:p></o:p></p>
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