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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-50374] Reduce jscore execution variance on the waterfall</title>
                <link>https://jira.mongodb.org/browse/SERVER-50374</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We currently observe high variance in execution times for the &lt;tt&gt;jscore&lt;/tt&gt; task on the CI loop. While &lt;tt&gt;jscore&lt;/tt&gt; usually takes about 5 minutes to run, sometimes it takes as long as 15.&lt;/p&gt;

&lt;p&gt;We would like to add &lt;tt&gt;jscore&lt;/tt&gt; to the commit queue tasks, and we could do so at 5 minutes, but not at 15.&lt;/p&gt;

&lt;p&gt;If we can reduce the variance and get the runtime stable at 5 minutes, we could greatly expand the coverage of the commit queue.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1445678">SERVER-50374</key>
            <summary>Reduce jscore execution variance on the waterfall</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-server-stm">Backlog - Server Tooling and Methods (STM)</assignee>
                                    <reporter username="andrew.morrow@mongodb.com">Andrew Morrow</reporter>
                        <labels>
                    </labels>
                <created>Tue, 18 Aug 2020 19:47:09 +0000</created>
                <updated>Mon, 5 Jun 2023 17:37:15 +0000</updated>
                                                                            <component>Build</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="3443000" author="xgen-internal-githook" created="Tue, 13 Oct 2020 19:47:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Richard Samuels&apos;, &apos;email&apos;: &apos;richard.l.samuels@gmail.com&apos;, &apos;username&apos;: &apos;richardsamuels&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50374&quot; title=&quot;Reduce jscore execution variance on the waterfall&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50374&quot;&gt;SERVER-50374&lt;/a&gt; Partially reduce jsCore execution variance&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0d941cb5c5a659ac526a9867342363f2f5020a6f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0d941cb5c5a659ac526a9867342363f2f5020a6f&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3442939" author="richard.samuels" created="Tue, 13 Oct 2020 19:19:03 +0000"  >&lt;p&gt;&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_62_64_bit_dynamic_required_jsCore_patch_441f18826c8469f871c1055032cf49be69e6d314_5f85ea9b562343185f666ba1_20_10_13_17_57_59##comparehashes=441f18826c8469f871c1055032cf49be69e6d314&amp;amp;threads=all&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This patch build&lt;/a&gt;&#160;off master shows that command -V is taking a very long time.&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2020/10/13 18:05:41.937] Running command &apos;shell.exec&apos; in &quot;do setup&quot; (step 1.7 of 2)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2020/10/13 18:05:55.616] bash: line 8: command: cygpath: not found&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_linux_64_debug_jsCore_patch_441f18826c8469f871c1055032cf49be69e6d314_5f7f4a4132f417699344dec3_20_10_08_17_20_19##comparehashes=441f18826c8469f871c1055032cf49be69e6d314&amp;amp;threads=all&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This patch build&lt;/a&gt;&#160;swaps command -V with which, and shows a significantly reduced time spent searching for cygpath:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2020/10/13 13:59:31.941] Running command &apos;shell.exec&apos; in &quot;do setup&quot; (step 1.7 of 2)&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[2020/10/13 13:59:31.945] which: no cygpath in (/opt/go/bin:/opt/go/bin:/opt/go/bin:/usr/lib64/icecc/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin:/opt/node/bin:/root/bin:/opt/node/bin:/opt/node/bin) &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;This is consistent in many reruns, so the above CR will commit this change. However, this is only a piece of the variance displayed in jsCore runtimes. &lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_linux_64_debug_jsCore_patch_441f18826c8469f871c1055032cf49be69e6d314_5f7f4a4132f417699344dec3_20_10_08_17_20_19/14##comparehashes=441f18826c8469f871c1055032cf49be69e6d314&amp;amp;threads=all&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This execution&apos;s task logs&lt;/a&gt;&#160;show off the other source:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2020/10/09 19:49:16.413] [resmoke] 2020-10-09T19:49:16.412+0000 Exiting with code: 0&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2020/10/09 19:49:16.413] [executor] 2020-10-09T19:49:16.413+0000 Total tar/gzip archive time is 0.00 seconds, for 0 file(s) 0 MB&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; [2020/10/09 19:54:16.471] [resmoke] 2020-10-09T19:54:16.470+0000 Failed to flush all logs within a reasonable amount of time, treating logs as incomplete &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160;i.e. logkeeper v2 performance. One other thing that I don&apos;t have logs handy for, is that when resmoke attempts to fetch build/test ids for storing individual test logs, we&apos;ve seen that take up to 1 minute per id. Any further progress on reducing the variance is blocked by PM-1439.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
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