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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-23243] Extract time-keeping from Listener</title>
                <link>https://jira.mongodb.org/browse/SERVER-23243</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Research and answer the following questions:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Who uses the listener&apos;s time-keeping functionality?&lt;/li&gt;
	&lt;li&gt;Do we need to preserve this functionality in 3.4?&lt;/li&gt;
	&lt;li&gt;If so, must the time-keeping logic be in the Listener, or can it go elsewhere?&lt;/li&gt;
	&lt;li&gt;How could we implement time-keeping in an async ASIO Listener?&lt;/li&gt;
	&lt;li&gt;How could we implement time-keeping in a synchronous ASIO Listener?&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="273739">SERVER-23243</key>
            <summary>Extract time-keeping from Listener</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="waley.chen">Waley Chen</assignee>
                                    <reporter username="samantha.ritter@mongodb.com">Samantha Ritter</reporter>
                        <labels>
                    </labels>
                <created>Sat, 19 Mar 2016 15:15:34 +0000</created>
                <updated>Tue, 5 Jul 2016 18:53:54 +0000</updated>
                            <resolved>Tue, 14 Jun 2016 04:13:43 +0000</resolved>
                                                    <fixVersion>3.3.9</fixVersion>
                                    <component>Networking</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1292936" author="xgen-internal-githook" created="Mon, 13 Jun 2016 22:14:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Remove time-keeping from listener&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/710159c9602a6738e6455cfb26bc2d70a0454ae2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/710159c9602a6738e6455cfb26bc2d70a0454ae2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1274787" author="xgen-internal-githook" created="Wed, 25 May 2016 14:25:51 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in scoped_timer.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6f72d36c1c8fc757962150713756ed2a553d817c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6f72d36c1c8fc757962150713756ed2a553d817c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1267582" author="xgen-internal-githook" created="Wed, 18 May 2016 14:06:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in scoped_timer.cpp&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit 51ee6f1952addc650b1c719cce51fcf460e6e9e8.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7480e5ed2e83b50da03a8e1f1ca1840e280644ef&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7480e5ed2e83b50da03a8e1f1ca1840e280644ef&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1266975" author="xgen-internal-githook" created="Tue, 17 May 2016 21:24:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in scoped_timer.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/51ee6f1952addc650b1c719cce51fcf460e6e9e8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/51ee6f1952addc650b1c719cce51fcf460e6e9e8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1260280" author="xgen-internal-githook" created="Tue, 10 May 2016 05:47:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in dur_journal.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e381d56bfe3a805e44678566437ef4a732d3fa1a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e381d56bfe3a805e44678566437ef4a732d3fa1a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1256867" author="xgen-internal-githook" created="Thu, 5 May 2016 18:46:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Refactor KVHarnessHelper::create&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1efbd7699da0536cec34a4392afd88f31b3832e3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1efbd7699da0536cec34a4392afd88f31b3832e3&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1252924" author="xgen-internal-githook" created="Tue, 3 May 2016 01:40:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in elapsed_tracker.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8abd5682f551ad79dec3557f721eebd45b21be0f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8abd5682f551ad79dec3557f721eebd45b21be0f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1252922" author="xgen-internal-githook" created="Tue, 3 May 2016 01:37:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; update WiredTigerKVEngine call&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/mongo-enterprise-modules/commit/448289675af390cfff5c5b985bae99966ca686fc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo-enterprise-modules/commit/448289675af390cfff5c5b985bae99966ca686fc&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1252786" author="xgen-internal-githook" created="Mon, 2 May 2016 22:27:36 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in elapsed_tracker.cpp&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit da38826985001daff55c7e2f723f73f5263e2dbf.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7f8861fbb04b9188e793f762fe2cfc01266fcf30&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7f8861fbb04b9188e793f762fe2cfc01266fcf30&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1252771" author="xgen-internal-githook" created="Mon, 2 May 2016 22:17:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in elapsed_tracker.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/da38826985001daff55c7e2f723f73f5263e2dbf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/da38826985001daff55c7e2f723f73f5263e2dbf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1249725" author="xgen-internal-githook" created="Thu, 28 Apr 2016 21:33:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace Listener::getElapsedTimeMillis() in record_access_tracker.cpp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dd3f158aef4bd82f43fe4de8a46fb76f28ddeef7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dd3f158aef4bd82f43fe4de8a46fb76f28ddeef7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1246043" author="xgen-internal-githook" created="Mon, 25 Apr 2016 21:25:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Replace the easy-to-remove usages of Listener::getElapsedTimeMillis()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/046441de98dd72689397a4a06f8a68ef58a4c226&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/046441de98dd72689397a4a06f8a68ef58a4c226&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1237743" author="xgen-internal-githook" created="Fri, 15 Apr 2016 22:02:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Add getPrecision to ClockSource&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/de534119c84dfd07ecf9401de94d3524268ec6fa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/de534119c84dfd07ecf9401de94d3524268ec6fa&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1236805" author="xgen-internal-githook" created="Fri, 15 Apr 2016 06:59:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Extract time-keeping from Listener&lt;/p&gt;

&lt;p&gt;BackgroundThreadClockSource &amp;amp; FastClockSourceFactory&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c2041cd99ea8ff1aa8bfba2d4bcb3bbd2ea7932c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c2041cd99ea8ff1aa8bfba2d4bcb3bbd2ea7932c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228644" author="xgen-internal-githook" created="Thu, 7 Apr 2016 06:09:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Extract time-keeping from Listener&lt;br/&gt;
fix compile error from previous commit&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/af5080d9478a9340ec4f54ae7f9e8e881cbc275e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/af5080d9478a9340ec4f54ae7f9e8e881cbc275e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1228626" author="xgen-internal-githook" created="Thu, 7 Apr 2016 05:44:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Extract time-keeping from Listener&lt;/p&gt;

&lt;p&gt;Renaming so we can differentiate between the two types of clocks (fast and precise):&lt;br/&gt;
1. setClockSource() -&amp;gt; setPreciseClockSource()&lt;br/&gt;
2. _clockSource -&amp;gt; _preciseClockSource&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/97d7ef4a5120cf7e7d6d912c0f0381663d9d0c3e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/97d7ef4a5120cf7e7d6d912c0f0381663d9d0c3e&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1219207" author="xgen-internal-githook" created="Wed, 30 Mar 2016 04:17:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;WaleyChen&apos;, u&apos;name&apos;: u&apos;Waley Chen&apos;, u&apos;email&apos;: u&apos;waleycz@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23243&quot; title=&quot;Extract time-keeping from Listener&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23243&quot;&gt;&lt;del&gt;SERVER-23243&lt;/del&gt;&lt;/a&gt; Extract time-keeping from Listener&lt;/p&gt;

&lt;p&gt;Step 1: getClockSource() -&amp;gt; getPreciseClockSource()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/58a490d466b31f70384b7173aa50fb32ac487563&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/58a490d466b31f70384b7173aa50fb32ac487563&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1210358" author="schwerin" created="Mon, 21 Mar 2016 22:18:50 +0000"  >&lt;p&gt;The cheap version of my solution is to leave out the part where you detect at startup if the wallclock is fast enough to use for the &quot;fast clock source&quot; and assume it is not. You can then add that later, as a power and clock precision optimization.&lt;/p&gt;</comment>
                            <comment id="1209764" author="acm" created="Mon, 21 Mar 2016 15:53:24 +0000"  >&lt;p&gt;I like &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=schwerin&quot; class=&quot;user-hover&quot; rel=&quot;schwerin&quot;&gt;schwerin&lt;/a&gt;&apos;s suggestion. The listener has never been the right place for this, so I support moving it elsewhere. It would also greatly reduce the power consumption of an idle mongod since it would not wake up all the time if it had a good clock source (see  &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2114&quot; title=&quot;Don&amp;#39;t use select timeouts for fast coarse timing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2114&quot;&gt;&lt;del&gt;SERVER-2114&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;</comment>
                            <comment id="1209541" author="schwerin" created="Mon, 21 Mar 2016 14:26:45 +0000"  >&lt;p&gt;I&apos;m pretty sure that we should get the Listener out of the timekeeping business. Instead, we should add a new ClockSource to ServiceContext called &quot;fast clock&quot; or something, and that ClockSource should read the fastest wall clock available on the system. On systems with no built-in fast wall clock, we should use a periodic timer to build a low-resolution, fast-to-read clock for uses that do not require high resolution. The existing &quot;getClockSource&quot; on ServiceContext should be called getPreciseClockSource, and Date_t::now() and other clock-reading functions should be deprecated. If we do these things, we can get rid of Listener&apos;s time-keeping functionality and replace it with a sensible system.&lt;/p&gt;

&lt;p&gt;The hardest part of this plan would be testing at startup to determine which implementations of ClockSource to use for the precise and fast clocks.&lt;/p&gt;</comment>
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