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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-28007] Re-enable support for CRC32 hardware acceleration on s390x</title>
                <link>https://jira.mongodb.org/browse/SERVER-28007</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After &lt;a href=&quot;https://jira.mongodb.org/browse/WT-3173&quot; title=&quot;Add runtime detection for s390x CRC32 hardware support&quot; class=&quot;issue-link&quot; data-issue-key=&quot;WT-3173&quot;&gt;&lt;del&gt;WT-3173&lt;/del&gt;&lt;/a&gt; is merged in master, and 3.4, the evergreen builders for SUSE 12, RHEL 7, and Ubuntu should enable support for CRC32 hardware acceleration.&lt;/p&gt;</description>
                <environment></environment>
        <key id="353845">SERVER-28007</key>
            <summary>Re-enable support for CRC32 hardware acceleration on s390x</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="mark.benvenuto@mongodb.com">Mark Benvenuto</assignee>
                                    <reporter username="mark.benvenuto@mongodb.com">Mark Benvenuto</reporter>
                        <labels>
                    </labels>
                <created>Tue, 14 Feb 2017 20:19:04 +0000</created>
                <updated>Wed, 6 Dec 2017 21:12:29 +0000</updated>
                            <resolved>Fri, 28 Apr 2017 17:53:28 +0000</resolved>
                                                    <fixVersion>3.4.5</fixVersion>
                    <fixVersion>3.5.7</fixVersion>
                                    <component>Portability</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1562438" author="mark.benvenuto" created="Tue, 2 May 2017 15:18:24 +0000"  >&lt;p&gt;Thank you &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.hoeller%40akazia.de&quot; class=&quot;user-hover&quot; rel=&quot;michael.hoeller@akazia.de&quot;&gt;michael.hoeller@akazia.de&lt;/a&gt; for your help. I have backported enabling the CRC32 hardware detection to 3.4. The z13+ chips will now take advantage of the CRC32 hardware support in 3.4.5.&lt;/p&gt;</comment>
                            <comment id="1562350" author="xgen-internal-githook" created="Tue, 2 May 2017 14:26:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;markbenvenuto&apos;, u&apos;name&apos;: u&apos;Mark Benvenuto&apos;, u&apos;email&apos;: u&apos;mark.benvenuto@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28007&quot; title=&quot;Re-enable support for CRC32 hardware acceleration on s390x&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28007&quot;&gt;&lt;del&gt;SERVER-28007&lt;/del&gt;&lt;/a&gt; Re-enable support for CRC32 hardware acceleration on s390x&lt;/p&gt;

&lt;p&gt;(cherry picked from commit c49c689fd78432b9df204185f25b79dddbbdebb2)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3b4c774c33428a0cd33f9a12cbdfcb12aafe1bee&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3b4c774c33428a0cd33f9a12cbdfcb12aafe1bee&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1561815" author="mark.benvenuto" created="Mon, 1 May 2017 20:45:32 +0000"  >&lt;p&gt;Michael, &lt;/p&gt;

&lt;p&gt;Here is a link to a &lt;a href=&quot;https://s3.amazonaws.com/mciuploads/mongodb-mongo-master/enterprise-suse12-s390x/5273c2bad7df58c44afdd677609b8656f399a906/binaries/mongo-mongodb_mongo_master_enterprise_suse12_s390x_5273c2bad7df58c44afdd677609b8656f399a906_17_04_29_14_10_45.tgz&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;s390x SLES 12 build&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Important&lt;/b&gt;: This is an experimental development build from our master branch. Do not use it with a production database, etc. &lt;/p&gt;

&lt;p&gt;I only need you to verify it starts, run the following commands to ensure it uses its own local database files instead of the default &lt;tt&gt;/data&lt;/tt&gt; files on the machine.&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;$ mkdir scratch&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;$ ./mongod --dbpath scratch&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;If it starts successfully, then I can backport the change to 3.4. It does not log whether it is using the CRC32 hardware instructions either way.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;

&lt;p&gt;Mark&lt;/p&gt;</comment>
                            <comment id="1561738" author="akazia" created="Mon, 1 May 2017 19:48:28 +0000"  >&lt;p&gt;Hello Mark,&lt;/p&gt;

&lt;p&gt;since I am working for a customer, I will ask for an ok to use his z12 System to test I think I will have this answer until your next morning. If it will be positive response, I will use a SLES 12.2 &lt;/p&gt;

&lt;p&gt;Best regards &lt;br/&gt;
Michael&lt;/p&gt;</comment>
                            <comment id="1561604" author="mark.benvenuto" created="Mon, 1 May 2017 17:58:59 +0000"  >&lt;p&gt;Michael, &lt;/p&gt;

&lt;p&gt;Right now, I only have access to z13 hardware. As such, I cannot be sure of the change unless I can test the hardware detection works on a z12 system. &lt;/p&gt;

&lt;p&gt;If you can verify a nightly test binary from master runs successfully on a z12 system, then I can backport this change to our 3.4 release branch, and then the z13 machines can take advantage of the CRC32 acceleration. After the backport is done, I could tell you which release the CRC32 hardware will be available in.&lt;/p&gt;

&lt;p&gt;Which operating systems (RHEL, SUSE, Ubuntu) for your z12 and z13 system do you need binaries for testing purposes? I just need you to verify the binary starts on a z12. The nightly build from master is only for testing purposes, and should be only used to evaluate this change.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;

&lt;p&gt;Mark&lt;/p&gt;</comment>
                            <comment id="1560589" author="akazia" created="Fri, 28 Apr 2017 19:53:15 +0000"  >&lt;p&gt;Hello Mark,&lt;/p&gt;

&lt;p&gt;thanks for pointing that out. I am sorry for my fault mentioning. I want to stress test on z12, z13, ... and currently (as you know)  the version plus CRC32 was not backward compatible to z12 . Somewhere is a ticket about it from me this is closed and the issue is covered with this ticket. Bottom line I am interested in a Potential release date so that I can plan my testings..&lt;/p&gt;

&lt;p&gt;Thanks a lot&lt;br/&gt;
Michael  &lt;/p&gt;</comment>
                            <comment id="1560434" author="mark.benvenuto" created="Fri, 28 Apr 2017 17:53:09 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=michael.hoeller%40akazia.de&quot; class=&quot;user-hover&quot; rel=&quot;michael.hoeller@akazia.de&quot;&gt;michael.hoeller@akazia.de&lt;/a&gt;, The CRC32 hardware acceleration is only available on z13 chips and Linux kernels which support the VX instructions. You can check this by looking for &lt;tt&gt;vx&lt;/tt&gt; in &lt;tt&gt;cat /proc/cpuinfo&lt;/tt&gt;. &lt;/p&gt;

&lt;p&gt;Background: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-25853?focusedCommentId=1371952&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1371952&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-25853?focusedCommentId=1371952&amp;amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1371952&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1560428" author="xgen-internal-githook" created="Fri, 28 Apr 2017 17:48:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;markbenvenuto&apos;, u&apos;name&apos;: u&apos;Mark Benvenuto&apos;, u&apos;email&apos;: u&apos;mark.benvenuto@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28007&quot; title=&quot;Re-enable support for CRC32 hardware acceleration on s390x&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28007&quot;&gt;&lt;del&gt;SERVER-28007&lt;/del&gt;&lt;/a&gt; Re-enable support for CRC32 hardware acceleration on s390x&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c49c689fd78432b9df204185f25b79dddbbdebb2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c49c689fd78432b9df204185f25b79dddbbdebb2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1559992" author="akazia" created="Fri, 28 Apr 2017 07:38:33 +0000"  >&lt;p&gt;Hello,&lt;br/&gt;
great to see that the code change is under review, I need to do some MongoDB testing on z12 and would like to use CRC32 do you have an estimation when you are going to release  this changes?&lt;br/&gt;
Thanks a lot&lt;br/&gt;
Michael&lt;/p&gt;</comment>
                    </comments>
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