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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-56347] Enable LSE intrinsics in release</title>
                <link>https://jira.mongodb.org/browse/SERVER-56347</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Support for building with &lt;tt&gt;-moutline-atomcis&lt;/tt&gt; was added in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51722&quot; title=&quot;Ensure that MongoDB builds with ARM LSE atomics&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51722&quot;&gt;&lt;del&gt;SERVER-51722&lt;/del&gt;&lt;/a&gt; and backported to v4.4 and v4.2. However, we do not yet have a GCC 8 release which offers that flag. We will need to wait on GCC 8.5 and then upgrade the toolchain. Once that happens, the next releases from v4.4 and v4.2 will use the LSE support. Note that the upcoming v5.0 release will have the LSE intrinsics without needing to wait for a compiler upgrade, because it targets &lt;tt&gt;armv8.2-a&lt;/tt&gt; by default. &lt;/p&gt;</description>
                <environment></environment>
        <key id="1691430">SERVER-56347</key>
            <summary>Enable LSE intrinsics in release</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="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, 26 Apr 2021 14:24:24 +0000</created>
                <updated>Sun, 29 Oct 2023 21:54:31 +0000</updated>
                            <resolved>Thu, 24 Jun 2021 01:30:54 +0000</resolved>
                                                    <fixVersion>4.2.15</fixVersion>
                    <fixVersion>4.4.7</fixVersion>
                                                        <votes>2</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="3895690" author="acm" created="Thu, 24 Jun 2021 01:30:54 +0000"  >&lt;p&gt;Closing this: the new toolchain is on the build images. The upcoming 4.4.7 and 4.2.15 releases will be built with &lt;tt&gt;-moutline-atomics&lt;/tt&gt;.&lt;/p&gt;</comment>
                            <comment id="3875907" author="acm" created="Mon, 14 Jun 2021 14:22:34 +0000"  >&lt;p&gt;The GCC 8.5 toolchain rollout has been completed. I&apos;ve pulled the latest Amazon Linux 2 builds for &lt;tt&gt;v4.2&lt;/tt&gt; and &lt;tt&gt;v4.4&lt;/tt&gt; from CI and validated that they were built with &lt;tt&gt;-moutline-atomics&lt;/tt&gt; and that they contain the LSE instructions per the technique described here: &lt;a href=&quot;https://github.com/aws/aws-graviton-getting-started/blob/master/c-c%2B%2B.md#large-system-extensions-lse&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/aws/aws-graviton-getting-started/blob/master/c-c%2B%2B.md#large-system-extensions-lse&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Support will be available in published builds as of the upcoming &lt;tt&gt;v4.2.15-rc0&lt;/tt&gt; and &lt;tt&gt;v4.4.7-rc0&lt;/tt&gt; releases.&lt;/p&gt;</comment>
                            <comment id="3786844" author="oliver@sensortower.com" created="Tue, 18 May 2021 21:56:32 +0000"  >&lt;p&gt;Thank you for the update!&lt;/p&gt;</comment>
                            <comment id="3786801" author="acm" created="Tue, 18 May 2021 21:49:55 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=oliver%40sensortower.com&quot; class=&quot;user-hover&quot; rel=&quot;oliver@sensortower.com&quot;&gt;oliver@sensortower.com&lt;/a&gt; - The internal ticket to upgrade the toolchain to GCC 8.5 is assigned and in progress. There is more than just a bit of process to get a new toolchain into production, but we are actively moving that process forward. We will update this ticket when builds are available with the new codegen.&lt;/p&gt;</comment>
                            <comment id="3786421" author="oliver@sensortower.com" created="Tue, 18 May 2021 20:54:07 +0000"  >&lt;p&gt;GCC 8.5 is released!&#160; &lt;a href=&quot;https://gcc.gnu.org/releases.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gcc.gnu.org/releases.html&lt;/a&gt;&#160; What are the next steps to upgrade the toolchain?&lt;/p&gt;</comment>
                            <comment id="3738577" author="acm" created="Mon, 26 Apr 2021 14:27:26 +0000"  >&lt;p&gt;This ticket is blocked on our upgrading the v3 toolchain to GCC 8.5, which is expected to be released in a few weeks per &lt;a href=&quot;https://gcc.gnu.org/pipermail/gcc/2021-April/235871.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://gcc.gnu.org/pipermail/gcc/2021-April/235871.html&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1685857">SERVER-56237</issuekey>
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