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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1255/">https://reviewboard.asterisk.org/r/1255/</a>
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<p style="margin-top: 0;">On July 6th, 2011, 10:20 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1255/diff/2/?file=16826#file16826line174" style="color: black; font-weight: bold; text-decoration: underline;">branches/1.8/res/res_timing_timerfd.c</a>
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(Diff revision 2)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int timerfd_timer_set_rate(int handle, unsigned int rate)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">our_timer</span><span class="o">-></span><span class="n">saved_timer</span><span class="p">.</span><span class="n">it_value</span><span class="p">.</span><span class="n">tv_nsec</span> <span class="o">==</span> <span class="mi">0L</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_log</span><span class="p">(</span><span class="n">LOG_WARNING</span><span class="p">,</span> <span class="s">"Reading attempt on idle timerfd. This would have caused a deadlock.</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">return</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I had to revert the patch from 1.8 and trunk. This statement right hear is causing some serious performance problems. See jrose's comment.
If we comment out this line, everything works fine for him.</pre>
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<p>On July 6th, 2011, 10:33 a.m., <b>David Vossel</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This same issue was reported here. https://issues.asterisk.org/jira/browse/ASTERISK-17867</pre>
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<p>On July 6th, 2011, 10:44 a.m., <b>kobaz</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">So, the whole patch was reverted. Is your vote to have the same code fix but minus the debugging? I've also heard from several people that the fix works with the debugging removed.</pre>
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<p>On July 6th, 2011, 11:04 a.m., <b>David Vossel</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">We tried taking out the debug statement in this if block, but it still caused performance issues. Things did not work well until we completely took out that if statement.</pre>
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<p>On July 6th, 2011, 11:06 a.m., <b>jrose</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Actually, the if statement was fine as long as you didn't include the return. It's running through the whole loop until the call is answered that causes the problem.</pre>
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<p>On July 6th, 2011, 11:11 a.m., <b>jrose</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Scratch that, I want to investigate this a little more. It seems like it's actually not getting into the while loop that causes the problem. Should have looked over it more carefully.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">It seems to me that the higher level functions that use this need to be investigated. The upper level calls to ack the timer should themselves be making sure they won't read an idle timer. The upper level stuff should be aware of timers it needs to ack and only access ones that have events waiting.</pre>
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<p>- kobaz</p>
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<p>On June 3rd, 2011, 4:11 p.m., kobaz wrote:</p>
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<div>Review request for Asterisk Developers and russelb.</div>
<div>By kobaz.</div>
<p style="color: grey;"><i>Updated June 3, 2011, 4:11 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Fix for issue https://issues.asterisk.org/view.php?id=18028
And several others.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Make enough calls to trigger a read on an idle timer
Wait for message:
Reading attempt on idle timerfd. This would have caused a deadlock.
Deadlock avoided.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>branches/1.8/res/res_timing_timerfd.c <span style="color: grey">(320171)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1255/diff/" style="margin-left: 3em;">View Diff</a></p>
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