https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/GENIUS-19 genius <p>Causes DHCP failures.</p> <p>Attaching openflow protocol pcap that indicates the amount of time between the VM port creation and the first flow install to table=0.</p> <p>Also attaching ODL log.</p> <p>Operating System: All<br/> Platform: All</p> GENIUS-19

long delays between vm boot and flow installation

Bug Resolved Done Tali Ben-Meir Koby Aizer Sun, 11 Sep 2016 12:18:35 +0000 Mon, 12 Sep 2016 15:56:59 +0000 Mon, 12 Sep 2016 15:56:59 +0000 (unspecified) General 0 2 <p>Attachment of-port16-port-status-and-flowmod.pcap has been added with description: openflow pcap</p> <p>Attachment karaf.log-long-boot-time-ofport16-filtered.log has been added with description: odl log</p> <p>Reproducible in compute nodes with many allocated cpus (tested with 48)<br/> We experience major performance degradation because of the way job-queues are handled by DataStoreJobCoordinator </p> <p>The DataStoreJobCoordinator main loop:</p> <p>while(true) {<br/> for (int i = 0; i &lt; THREADPOOL_SIZE; i++) {<br/> Map&lt;String, JobQueue&gt; jobEntriesMap = jobQueueMap.get<img class="emoticon" src="https://jira.opendaylight.org/images/icons/emoticons/information.png" height="16" width="16" align="absmiddle" alt="" border="0"/>;<br/> if (jobEntriesMap.isEmpty()) </p> { Thread.sleep(500); continue; } <p> // handle jobEntriesMap<br/> // ...</p> <p> if (jobQueueMap.isEmpty()) {<br/> reentrantLock.lock();<br/> try </p> { waitCondition.await(); } <p> finally </p> { reentrantLock.unlock(); } <p> }<br/> }</p> <p>There are 2 main issues here resulting in throttling:<br/> 1. Jobs are not distributed evenly between the entries in the jobQueueMap. As a result this thread sleeps a lot - sometimes ~10-20sec<br/> 2. the condition guarding waitCondition.await is never reached since the jobQueueMap is never empty - it always contain an entry per thread.</p> <p><a href="https://git.opendaylight.org/gerrit/#/c/45477/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/45477/</a></p> Development External issue ID 6689 External issue URL Rank 0|i01ocn: