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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>
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<item>
            <title>[SERVER-54407] Specify a microarchitecture minimum for x86_64 builds</title>
                <link>https://jira.mongodb.org/browse/SERVER-54407</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For all other architectures than x86_64, we have a known microarchitecture minimum. We should select one for x86_64 and set it at build time.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1616651">SERVER-54407</key>
            <summary>Specify a microarchitecture minimum for x86_64 builds</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="13201">Fixed</resolution>
                                        <assignee username="andrew.morrow@mongodb.com">Andrew Morrow</assignee>
                                    <reporter username="andrew.morrow@mongodb.com">Andrew Morrow</reporter>
                        <labels>
                    </labels>
                <created>Mon, 8 Feb 2021 20:22:41 +0000</created>
                <updated>Sun, 29 Oct 2023 21:57:46 +0000</updated>
                            <resolved>Fri, 12 Mar 2021 00:20:51 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3661365" author="xgen-internal-githook" created="Thu, 11 Mar 2021 23:45:47 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Morrow&apos;, &apos;email&apos;: &apos;acm@mongodb.com&apos;, &apos;username&apos;: &apos;acmorrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54407&quot; title=&quot;Specify a microarchitecture minimum for x86_64 builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54407&quot;&gt;&lt;del&gt;SERVER-54407&lt;/del&gt;&lt;/a&gt; Default enable the sandybridge experiment&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1f244b332216fcce68a334efc9b458c0d631ef4a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1f244b332216fcce68a334efc9b458c0d631ef4a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3634974" author="acm" created="Thu, 25 Feb 2021 15:05:48 +0000"  >&lt;p&gt;Support for this has been merged under a flag so that we can more easily evaluate the performance impacts in the various performance projects. Targeting &lt;tt&gt;sandybridge&lt;/tt&gt; can be achieved by building with &lt;tt&gt;--experimental-optimization=+sandybridge&lt;/tt&gt;.&lt;/p&gt;</comment>
                            <comment id="3634017" author="xgen-internal-githook" created="Wed, 24 Feb 2021 23:10:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Morrow&apos;, &apos;email&apos;: &apos;acm@mongodb.com&apos;, &apos;username&apos;: &apos;acmorrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54407&quot; title=&quot;Specify a microarchitecture minimum for x86_64 builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54407&quot;&gt;&lt;del&gt;SERVER-54407&lt;/del&gt;&lt;/a&gt; Add an experiment for sandybridge as x86_64 minimum microarchitecture&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/267ab99c21ea539042d5ee50204a89b15d434974&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/267ab99c21ea539042d5ee50204a89b15d434974&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3634015" author="xgen-internal-githook" created="Wed, 24 Feb 2021 23:10:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Morrow&apos;, &apos;email&apos;: &apos;acm@mongodb.com&apos;, &apos;username&apos;: &apos;acmorrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54407&quot; title=&quot;Specify a microarchitecture minimum for x86_64 builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54407&quot;&gt;&lt;del&gt;SERVER-54407&lt;/del&gt;&lt;/a&gt; Set explicit default microarchitecture minima&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6286ed49154196a02febfe584927bcdd2042f8da&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6286ed49154196a02febfe584927bcdd2042f8da&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1622312">DOCS-14221</issuekey>
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            <issuekey id="1705415">SERVER-56728</issuekey>
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                            <customfieldvalue>After this change MongoDB will only run on Intel systems offering a Sandybridge (&lt;a href=&quot;https://en.wikipedia.org/wiki/List_of_Intel_CPU_microarchitectures&quot;&gt;https://en.wikipedia.org/wiki/List_of_Intel_CPU_microarchitectures&lt;/a&gt;) or newer microarchitecture. Attempting to start server binaries on systems not offering that level of hardware support will result in an immediate hard operating-system level crash (e.g. no MongoDB diagnostic will be provided).&lt;br/&gt;
&lt;br/&gt;
Note that we have similar minima already in place for power, s390x, and ARM systems, so this is just bringing x86_64 up to par.&lt;br/&gt;
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