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This is a (huge) waste of cpu and I/O time.</p> <p>Most of these calls are related to cgroups.</p> <p>Please consider these proposals :</p> <p>1/ Is /proc/mounts mandatory for cgroups ? <br/> We already have cgroup subsystems list from /proc/cgroups.<br/> The only compelling information from /proc/mounts seems to be the root mount point, <br/> /sys/fs/cgroup/, which could be obtained by a unique read on agent start.</p> <p>2/ use /proc/self/mountstats</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>wc /proc/self/mounts /proc/self/mountstats 361 2166 201299 /proc/self/mounts 361 2888 50200 /proc/self/mountstats </pre> </div></div> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>grep cgroup /proc/self/mounts cgroup /sys/fs/cgroup tmpfs rw,relatime,mode=755 0 0 cgroup /sys/fs/cgroup/cpuset cgroup rw,relatime,cpuset 0 0 cgroup /sys/fs/cgroup/cpu cgroup rw,relatime,cpu 0 0 cgroup /sys/fs/cgroup/cpuacct cgroup rw,relatime,cpuacct 0 0 cgroup /sys/fs/cgroup/blkio cgroup rw,relatime,blkio 0 0 cgroup /sys/fs/cgroup/memory cgroup rw,relatime,memory 0 0 cgroup /sys/fs/cgroup/devices cgroup rw,relatime,devices 0 0 cgroup /sys/fs/cgroup/freezer cgroup rw,relatime,freezer 0 0 cgroup /sys/fs/cgroup/net_cls cgroup rw,relatime,net_cls 0 0 cgroup /sys/fs/cgroup/perf_event cgroup rw,relatime,perf_event 0 0 cgroup /sys/fs/cgroup/net_prio cgroup rw,relatime,net_prio 0 0 cgroup /sys/fs/cgroup/pids cgroup rw,relatime,pids 0 0 </pre> </div></div> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>grep cgroup /proc/self/mountstats device cgroup mounted on /sys/fs/cgroup with fstype tmpfs device cgroup mounted on /sys/fs/cgroup/cpuset with fstype cgroup device cgroup mounted on /sys/fs/cgroup/cpu with fstype cgroup device cgroup mounted on /sys/fs/cgroup/cpuacct with fstype cgroup device cgroup mounted on /sys/fs/cgroup/blkio with fstype cgroup device cgroup mounted on /sys/fs/cgroup/memory with fstype cgroup device cgroup mounted on /sys/fs/cgroup/devices with fstype cgroup device cgroup mounted on /sys/fs/cgroup/freezer with fstype cgroup device cgroup mounted on /sys/fs/cgroup/net_cls with fstype cgroup device cgroup mounted on /sys/fs/cgroup/perf_event with fstype cgroup device cgroup mounted on /sys/fs/cgroup/net_prio with fstype cgroup device cgroup mounted on /sys/fs/cgroup/pids with fstype cgroup </pre> </div></div> <p>This file contains all the required information, and is 4x smaller</p> <p>3/ microcaching<br/> Caching cgroups data for just 1 second would be a huge perfomance improvement, but i'm not aware of the possible side effects.</p> </div> </div> </div></div><div id=dnd-metadata class="module toggle-wrap"><div id="dnd-metadata_heading" class="mod-header"><button class="aui-button toggle-title" aria-label="Attachments" aria-controls="dnd-metadata" 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data-id=\\\"worklog-tabpanel\\\"\\n data-key=\\\"com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\"\\n data-label=\\\"Work Log\\\"\\n data-href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"worklog-tabpanel\\\" href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\" class=\\\"ajax-activity-content\\\"\u003eWork Log\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \\n \u003cli class=\\\"menu-item \\\"\\n id=\\\"changehistory-tabpanel\\\"\\n data-id=\\\"changehistory-tabpanel\\\"\\n data-key=\\\"com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel\\\"\\n data-label=\\\"History\\\"\\n data-href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"changehistory-tabpanel\\\" href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel\\\" class=\\\"ajax-activity-content\\\"\u003eHistory\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \\n \u003cli class=\\\"menu-item \\\"\\n id=\\\"activity-stream-issue-tab\\\"\\n data-id=\\\"activity-stream-issue-tab\\\"\\n data-key=\\\"com.atlassian.streams.streams-jira-plugin:activity-stream-issue-tab\\\"\\n data-label=\\\"Activity\\\"\\n data-href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.streams.streams-jira-plugin:activity-stream-issue-tab\\\"\\n \u003e\\n \u003ca id=\\\"activity-stream-issue-tab\\\" href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.atlassian.streams.streams-jira-plugin:activity-stream-issue-tab\\\" class=\\\"ajax-activity-content\\\"\u003eActivity\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \\n \u003cli class=\\\"menu-item \\\"\\n id=\\\"transitions-summary-tabpanel\\\"\\n data-id=\\\"transitions-summary-tabpanel\\\"\\n data-key=\\\"com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\"\\n data-label=\\\"Transitions\\\"\\n data-href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"transitions-summary-tabpanel\\\" href=\\\"\\/jira\\/browse\\/MESOS-8418?page=com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\" class=\\\"ajax-activity-content\\\"\u003eTransitions\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \u003c\\/ul\u003e\\n\\n \u003cdiv class=\\\"sortwrap\\\"\u003e\\n \u003ca class=\\\"issue-activity-sort-link ajax-activity-content\\\" rel=\\\"nofollow\\\" data-tab-sort data-order=\\\"desc\\\" href=\\\"\\/jira\\/browse\\/MESOS-8418?actionOrder=desc\\\" title=\\\"Ascending order - Click to sort in descending order\\\"\u003e\\n \u003cspan class=\\\"aui-icon aui-icon-small aui-iconfont-up\\\"\u003eAscending order - Click to sort in descending order\u003c\\/span\u003e\\n \u003c\\/a\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"tabs-pane active-pane\\\"\u003e\u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"issuePanelWrapper\\\"\u003e\\n \u003cdiv class=\\\"issuePanelProgress\\\"\u003e\u003c\\/div\u003e\\n \u003cdiv class=\\\"issuePanelContainer\\\" id=\\\"issue_actions_container\\\"\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16538309\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16538309_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16538309&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16538309\' class=\'commentdate_16538309_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'10\\/Jul\\/18 09:27\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-10T09:27:25+0000\'\u003e10\\/Jul\\/18 09:27\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eAs a workaround bumping the following options seems to help reduce the \u003ctt\u003emesos-agent\u003c\\/tt\u003e load:\u003c\\/p\u003e\\n\\n\u003cul\u003e\\n\\t\u003cli\u003econtainer_disk_watch_interval\u003c\\/li\u003e\\n\\t\u003cli\u003edisk_watch_interval\u003c\\/li\u003e\\n\\t\u003cli\u003eoversubscribed_resources_interval\u003c\\/li\u003e\\n\\t\u003cli\u003eqos_correction_interval_min\u003c\\/li\u003e\\n\u003c\\/ul\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16538309_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16538309&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16538309\' class=\'commentdate_16538309_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'10\\/Jul\\/18 09:27\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-10T09:27:25+0000\'\u003e10\\/Jul\\/18 09:27\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e As a workaround bumping the following options seems to help reduce the mesos-agent load: \\n\\n \\n\\t container_disk_watch_interval \\n\\t disk_watch_interval \\n\\t oversubscribed_resources_interval \\n\\t qos_correction_interval_min \\n \\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16543743\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16543743_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16543743&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16543743\' class=\'commentdate_16543743_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/Jul\\/18 21:30\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-13T21:30:14+0000\'\u003e13\\/Jul\\/18 21:30\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Stephan Erb - 16\\/Jul\\/18 08:29\\\"\u003eedited\u003c\\/span\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eI have attached a profile \u003cspan class=\\\"nobr\\\"\u003e\u003ca href=\\\"\\/jira\\/secure\\/attachment\\/12931605\\/12931605_mesos-agent.stacks.gz\\\" title=\\\"mesos-agent.stacks.gz attached to MESOS-8418\\\" target=\\\"_blank\\\" rel=\\\"noopener\\\"\u003emesos-agent.stacks.gz\u003csup\u003e\u003cimg class=\\\"rendericon\\\" src=\\\"\\/jira\\/images\\/icons\\/link_attachment_7.gif\\\" height=\\\"7\\\" width=\\\"7\\\" align=\\\"absmiddle\\\" alt=\\\"\\\" border=\\\"0\\\"\\/\u003e\u003c\\/sup\u003e\u003c\\/a\u003e\u003c\\/span\u003e gathered on a host with:\u003c\\/p\u003e\\n\u003cul\u003e\\n\\t\u003cli\u003e~140 tasks, all running docker images via the Mesos containerizer\u003c\\/li\u003e\\n\\t\u003cli\u003erelevant isolators \u003ctt\u003ecgroups\\/cpu,cgroups\\/mem,filesystem\\/linux,docker\\/runtime,...\'\u003c\\/tt\u003e\u003c\\/li\u003e\\n\\t\u003cli\u003eagent monitoring endpoints \u003ctt\u003e\\/slave(1)\\/monitor\\/statistic\u003c\\/tt\u003e and \u003ctt\u003e\\/slave(1)\\/state\u003c\\/tt\u003e are scraped every 15s. In total, a scrape takes between 5-13sec\u003c\\/li\u003e\\n\\t\u003cli\u003epotentially related agent settings:\\n\\t\u003cul\u003e\\n\\t\\t\u003cli\u003e--oversubscribed_resources_interval=45secs\u003c\\/li\u003e\\n\\t\\t\u003cli\u003e--qos_correction_interval_min=45secs\u003c\\/li\u003e\\n\\t\\t\u003cli\u003e--cgroups_cpu_enable_pids_and_tids_count\u003c\\/li\u003e\\n\\t\\t\u003cli\u003e--cgroups_enable_cfs\\u00A0\u003c\\/li\u003e\\n\\t\u003c\\/ul\u003e\\n\\t\u003c\\/li\u003e\\n\u003c\\/ul\u003e\\n\\n\\n\u003cp\u003eThe profile confirms that reading a mount table takes significant time, and is also done multiple times in short succession:\u003c\\/p\u003e\\n\\n\u003cp\u003e\u003cspan class=\\\"image-wrap\\\" style=\\\"\\\"\u003e\u003cimg src=\\\"\\/jira\\/secure\\/attachment\\/12931608\\/12931608_mesos-agent-flamegraph.png\\\" height=\\\"450\\\" width=\\\"800\\\" style=\\\"border: 0px solid black\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16543743_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16543743&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16543743\' class=\'commentdate_16543743_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/Jul\\/18 21:30\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-13T21:30:14+0000\'\u003e13\\/Jul\\/18 21:30\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Stephan Erb - 16\\/Jul\\/18 08:29\\\"\u003eedited\u003c\\/span\u003e I have attached a profile mesos-agent.stacks.gz gathered on a host with: \\n \\n\\t ~140 tasks, all running docker images via the Mesos containerizer \\n\\t relevant isolators cgroups\\/cpu,cgroups\\/mem,filesystem\\/linux,docker\\/runtime,...\' \\n\\t agent monitoring endpoints \\/slave(1)\\/monitor\\/statistic and \\/slave(1)\\/state are scraped every 15s. In total, a scrape takes between 5-13sec \\n\\t potentially related agent settings:\\n\\t \\n\\t\\t --oversubscribed_resources_interval=45secs \\n\\t\\t --qos_correction_interval_min=45secs \\n\\t\\t --cgroups_cpu_enable_pids_and_tids_count \\n\\t\\t --cgroups_enable_cfs\\u00A0 \\n\\t \\n\\t \\n \\n\\n\\n The profile confirms that reading a mount table takes significant time, and is also done multiple times in short succession: \\n\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16544376\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544376_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544376&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544376\' class=\'commentdate_16544376_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'14\\/Jul\\/18 23:41\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-14T23:41:53+0000\'\u003e14\\/Jul\\/18 23:41\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eThe source of this issue is that all of the cgroup reads go through a verify function:\u003cbr\\/\u003e\\n\u003ca href=\\\"https:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L922\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L922\u003c\\/a\u003e\u003c\\/p\u003e\\n\\n\u003cp\u003eIt looks like the vast majority of the cpu time wasted here is inside this function, when checking to see if the cgroup is mounted in the hierarchy:\u003cbr\\/\u003e\\n\u003ca href=\\\"https:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L472\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L472\u003c\\/a\u003e\u003c\\/p\u003e\\n\\n\u003cp\u003eI\'m not sure why the cgroup reads need to go through this. It provides a clearer error message but at an extreme performance cost. The fix here seems to be to let the reads go directly through to os::read without going through the verify function, and letting it fail with a more generic read error message.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544376_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544376&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544376\' class=\'commentdate_16544376_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'14\\/Jul\\/18 23:41\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-14T23:41:53+0000\'\u003e14\\/Jul\\/18 23:41\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e The source of this issue is that all of the cgroup reads go through a verify function: \\n https:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L922 \\n\\n It looks like the vast majority of the cpu time wasted here is inside this function, when checking to see if the cgroup is mounted in the hierarchy: \\n https:\\/\\/github.com\\/apache\\/mesos\\/blob\\/1.6.0\\/src\\/linux\\/cgroups.cpp#L472 \\n\\n I\'m not sure why the cgroup reads need to go through this. It provides a clearer error message but at an extreme performance cost. The fix here seems to be to let the reads go directly through to os::read without going through the verify function, and letting it fail with a more generic read error message. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16544399\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jieyu\\\" id=\\\"commentauthor_16544399_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jieyu\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Jie Yu\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544399&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544399\' class=\'commentdate_16544399_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'15\\/Jul\\/18 04:38\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-15T04:38:39+0000\'\u003e15\\/Jul\\/18 04:38\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eYeah, I feel that we should let caller decide whether to call `verify` or not, instead of doing that for all cgroup related operations (e.g., create\\/read\\/write\\/mount\\/unmount\\/etc.)\u003c\\/p\u003e\\n\\n\u003cp\u003ecc \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=gilbert\\\" class=\\\"user-hover\\\" rel=\\\"gilbert\\\"\u003egilbert\u003c\\/a\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jieyu\\\" id=\\\"commentauthor_16544399_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jieyu\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Jie Yu\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544399&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544399\' class=\'commentdate_16544399_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'15\\/Jul\\/18 04:38\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-15T04:38:39+0000\'\u003e15\\/Jul\\/18 04:38\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Yeah, I feel that we should let caller decide whether to call `verify` or not, instead of doing that for all cgroup related operations (e.g., create\\/read\\/write\\/mount\\/unmount\\/etc.) \\n\\n cc gilbert \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16544728\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544728_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544728&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544728\' class=\'commentdate_16544728_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 02:04\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T02:04:50+0000\'\u003e16\\/Jul\\/18 02:04\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\" class=\\\"user-hover\\\" rel=\\\"jieyu\\\"\u003ejieyu\u003c\\/a\u003e \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=gilbert\\\" class=\\\"user-hover\\\" rel=\\\"gilbert\\\"\u003egilbert\u003c\\/a\u003e as a short term fix, I wrote a patch to read first (for performance), then only if the read fails call verify (to provide a more meaningful error message). This doesn\'t address verify performance problems in the other helpers, which I suspect will be necessary if we do some containerization benchmarking, but it at least addresses this steady state high cpu consumption issue (assuming the reads succeed). Let me know what you think:\u003c\\/p\u003e\\n\\n\u003cp\u003e\u003ca href=\\\"https:\\/\\/reviews.apache.org\\/r\\/67923\\/\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/reviews.apache.org\\/r\\/67923\\/\u003c\\/a\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544728_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544728&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544728\' class=\'commentdate_16544728_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 02:04\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T02:04:50+0000\'\u003e16\\/Jul\\/18 02:04\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e jieyu gilbert as a short term fix, I wrote a patch to read first (for performance), then only if the read fails call verify (to provide a more meaningful error message). This doesn\'t address verify performance problems in the other helpers, which I suspect will be necessary if we do some containerization benchmarking, but it at least addresses this steady state high cpu consumption issue (assuming the reads succeed). Let me know what you think: \\n\\n https:\\/\\/reviews.apache.org\\/r\\/67923\\/ \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16544737\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544737_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544737&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544737\' class=\'commentdate_16544737_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 02:26\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T02:26:54+0000\'\u003e16\\/Jul\\/18 02:26\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eThanks \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=kaalh\\\" class=\\\"user-hover\\\" rel=\\\"kaalh\\\"\u003ekaalh\u003c\\/a\u003e for filing this ticket and \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\" class=\\\"user-hover\\\" rel=\\\"StephanErb\\\"\u003eStephanErb\u003c\\/a\u003e for providing the profiling data. Sorry that this ticket has been open for so long. We\'ll make sure to address this soon and backport the improvements (which version are you running?). I\'ll make sure we scan for new tickets with the \'performance\' label in them before\\/during each performance working group meeting to see if any severe issues (like this one) arise. But as always, please feel free to reach out directly on the dev@ list or in the #performance slack channel if something important isn\'t getting any attention; JIRA is not so flexible when it comes to setting email alerts based on ticket labels, so sometimes we accidentally miss important issues.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16544737_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544737&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544737\' class=\'commentdate_16544737_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 02:26\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T02:26:54+0000\'\u003e16\\/Jul\\/18 02:26\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Thanks kaalh for filing this ticket and StephanErb for providing the profiling data. Sorry that this ticket has been open for so long. We\'ll make sure to address this soon and backport the improvements (which version are you running?). I\'ll make sure we scan for new tickets with the \'performance\' label in them before\\/during each performance working group meeting to see if any severe issues (like this one) arise. But as always, please feel free to reach out directly on the dev@ list or in the #performance slack channel if something important isn\'t getting any attention; JIRA is not so flexible when it comes to setting email alerts based on ticket labels, so sometimes we accidentally miss important issues. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16544916\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"kaalh\\\" id=\\\"commentauthor_16544916_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=kaalh\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"kaalh\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e St\\u00E9phane Cottin\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544916&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544916\' class=\'commentdate_16544916_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 07:56\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T07:56:02+0000\'\u003e16\\/Jul\\/18 07:56\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eafter applying \u003ca href=\\\"https:\\/\\/reviews.apache.org\\/r\\/67923\\/\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/reviews.apache.org\\/r\\/67923\\/\u003c\\/a\u003e on our test node (1.6 branch), the agent average cpu usage dropped from ~230% to ~120%.\u003c\\/p\u003e\\n\\n\u003cp\u003eWell done, this is a great improvement, but the average cpu usage remains quite high, a quick perf report shows the statfs usage is still significant.\u003c\\/p\u003e\\n\\n\u003cp\u003e@\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\" class=\\\"user-hover\\\" rel=\\\"StephanErb\\\"\u003eStephanErb\u003c\\/a\u003e if possible, could you please update the profile data \\/ flamegraph with this patch applied ?\u003cbr\\/\u003e\\n2.5.0.0\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"kaalh\\\" id=\\\"commentauthor_16544916_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=kaalh\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"kaalh\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e St\\u00E9phane Cottin\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16544916&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16544916\' class=\'commentdate_16544916_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 07:56\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T07:56:02+0000\'\u003e16\\/Jul\\/18 07:56\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e after applying https:\\/\\/reviews.apache.org\\/r\\/67923\\/ on our test node (1.6 branch), the agent average cpu usage dropped from ~230% to ~120%. \\n\\n Well done, this is a great improvement, but the average cpu usage remains quite high, a quick perf report shows the statfs usage is still significant. \\n\\n @ StephanErb if possible, could you please update the profile data \\/ flamegraph with this patch applied ? \\n2.5.0.0 \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16545686\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16545686_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16545686&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16545686\' class=\'commentdate_16545686_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 20:02\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T20:02:30+0000\'\u003e16\\/Jul\\/18 20:02\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Benjamin Mahler - 16\\/Jul\\/18 20:04\\\"\u003eedited\u003c\\/span\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=kaalh\\\" class=\\\"user-hover\\\" rel=\\\"kaalh\\\"\u003ekaalh\u003c\\/a\u003e ok, that\'s a different issue that is not in the existing perf data on this ticket so please do include perf data for what you\'re seeing, here\'s how to do it: \u003ca href=\\\"http:\\/\\/mesos.apache.org\\/documentation\\/latest\\/performance-profiling\\/\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttp:\\/\\/mesos.apache.org\\/documentation\\/latest\\/performance-profiling\\/\u003c\\/a\u003e\u003c\\/p\u003e\\n\\n\u003cp\u003eNo need to generate the flamegraph if you don\'t have the tools, just the compressed file in the instructions is needed.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16545686_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16545686&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16545686\' class=\'commentdate_16545686_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'16\\/Jul\\/18 20:02\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-16T20:02:30+0000\'\u003e16\\/Jul\\/18 20:02\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Benjamin Mahler - 16\\/Jul\\/18 20:04\\\"\u003eedited\u003c\\/span\u003e kaalh ok, that\'s a different issue that is not in the existing perf data on this ticket so please do include perf data for what you\'re seeing, here\'s how to do it: http:\\/\\/mesos.apache.org\\/documentation\\/latest\\/performance-profiling\\/ \\n\\n No need to generate the flamegraph if you don\'t have the tools, just the compressed file in the instructions is needed. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16545893\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16545893_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16545893&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16545893\' class=\'commentdate_16545893_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'17\\/Jul\\/18 00:35\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-17T00:35:45+0000\'\u003e17\\/Jul\\/18 00:35\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Benjamin Mahler - 17\\/Jul\\/18 00:42\\\"\u003eedited\u003c\\/span\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\" class=\\\"user-hover\\\" rel=\\\"StephanErb\\\"\u003eStephanErb\u003c\\/a\u003e \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=kaalh\\\" class=\\\"user-hover\\\" rel=\\\"kaalh\\\"\u003ekaalh\u003c\\/a\u003e I pushed the patch for the original issue in this ticket and will backport it. Can you file a ticket that captures the other issue you\'re seeing with statfs?\u003c\\/p\u003e\\n\\n\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\" class=\\\"user-hover\\\" rel=\\\"jieyu\\\"\u003ejieyu\u003c\\/a\u003e I filed \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/browse\\/MESOS-9081\\\" title=\\\"cgroups::verify is expensive and is done implicitly during cgroups operations.\\\" class=\\\"issue-link\\\" data-issue-key=\\\"MESOS-9081\\\"\u003e\u003cdel\u003eMESOS-9081\u003c\\/del\u003e\u003c\\/a\u003e for a better long term fix.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"bmahler\\\" id=\\\"commentauthor_16545893_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"bmahler\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Benjamin Mahler\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16545893&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16545893\' class=\'commentdate_16545893_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'17\\/Jul\\/18 00:35\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-17T00:35:45+0000\'\u003e17\\/Jul\\/18 00:35\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e - \u003cspan class=\\\"subText update-info\\\" title=\\\"Benjamin Mahler - 17\\/Jul\\/18 00:42\\\"\u003eedited\u003c\\/span\u003e StephanErb kaalh I pushed the patch for the original issue in this ticket and will backport it. Can you file a ticket that captures the other issue you\'re seeing with statfs? \\n\\n jieyu I filed MESOS-9081 for a better long term fix. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16546413\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16546413_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16546413&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16546413\' class=\'commentdate_16546413_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'17\\/Jul\\/18 11:08\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-17T11:08:24+0000\'\u003e17\\/Jul\\/18 11:08\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eThanks a lot for the super quick resolution\\u00A0\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=bmahler\\\" class=\\\"user-hover\\\" rel=\\\"bmahler\\\"\u003ebmahler\u003c\\/a\u003e!\u003c\\/p\u003e\\n\\n\u003cp\u003eWe are currently busy with prepping the 1.6.x deployment inhouse and will throw this patch on top as well. I will report back with my findings. I am confident that this will have solved our current performance issues.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16546413_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16546413&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16546413\' class=\'commentdate_16546413_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'17\\/Jul\\/18 11:08\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-07-17T11:08:24+0000\'\u003e17\\/Jul\\/18 11:08\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Thanks a lot for the super quick resolution\\u00A0 bmahler ! \\n\\n We are currently busy with prepping the 1.6.x deployment inhouse and will throw this patch on top as well. I will report back with my findings. I am confident that this will have solved our current performance issues. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16570101\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16570101_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16570101&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16570101\' class=\'commentdate_16570101_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'06\\/Aug\\/18 11:52\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-08-06T11:52:07+0000\'\u003e06\\/Aug\\/18 11:52\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eThe first graph gives a rough impression of how many tasks per agents we have. The second one shows the improvement of the end-to-end monitoring latency once we have applied the cgroup performance patch.\u003c\\/p\u003e\\n\\n\u003cp\u003eWe use the Prometheus Mesos exporter to scrape metrics (i.e. \u003ca href=\\\"https:\\/\\/github.com\\/mesosphere\\/mesos_exporter\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/github.com\\/mesosphere\\/mesos_exporter\u003c\\/a\u003e) and it scrapes multiple agent endpoints for this.\u003c\\/p\u003e\\n\\n\u003cp\u003e\u003cspan class=\\\"image-wrap\\\" style=\\\"\\\"\u003e\u003cimg src=\\\"\\/jira\\/secure\\/attachment\\/12934468\\/12934468_image-2018-08-06-13-49-03-317.png\\\" style=\\\"border: 0px solid black\\\" \\/\u003e\u003c\\/span\u003e\u003cspan class=\\\"image-wrap\\\" style=\\\"\\\"\u003e\u003cimg src=\\\"\\/jira\\/secure\\/attachment\\/12934467\\/12934467_image-2018-08-06-13-49-03-241.png\\\" style=\\\"border: 0px solid black\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/p\u003e\\n\\n\u003cp\u003eSo in our usecase the improvement has been significant. Thanks again!\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"StephanErb\\\" id=\\\"commentauthor_16570101_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=StephanErb\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"StephanErb\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Stephan Erb\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16570101&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16570101\' class=\'commentdate_16570101_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'06\\/Aug\\/18 11:52\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-08-06T11:52:07+0000\'\u003e06\\/Aug\\/18 11:52\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e The first graph gives a rough impression of how many tasks per agents we have. The second one shows the improvement of the end-to-end monitoring latency once we have applied the cgroup performance patch. \\n\\n We use the Prometheus Mesos exporter to scrape metrics (i.e. https:\\/\\/github.com\\/mesosphere\\/mesos_exporter ) and it scrapes multiple agent endpoints for this. \\n\\n \\n\\n So in our usecase the improvement has been significant. Thanks again! \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-16585412\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jieyu\\\" id=\\\"commentauthor_16585412_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jieyu\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Jie Yu\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16585412&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16585412\' class=\'commentdate_16585412_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'20\\/Aug\\/18 04:35\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-08-20T04:35:45+0000\'\u003e20\\/Aug\\/18 04:35\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eI posted another patch to eliminate the mount table read for cgroups creation and write\u003cbr\\/\u003e\\n\u003ca href=\\\"https:\\/\\/reviews.apache.org\\/r\\/68426\\/\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/reviews.apache.org\\/r\\/68426\\/\u003c\\/a\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jieyu\\\" id=\\\"commentauthor_16585412_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jieyu\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jieyu\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Jie Yu\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/MESOS-8418?focusedCommentId=16585412&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16585412\' class=\'commentdate_16585412_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'20\\/Aug\\/18 04:35\'\u003e\u003ctime class=\'livestamp\' datetime=\'2018-08-20T04:35:45+0000\'\u003e20\\/Aug\\/18 04:35\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e I posted another patch to eliminate the mount table read for cgroups creation and write \\n https:\\/\\/reviews.apache.org\\/r\\/68426\\/ \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\""; if(window.WRM._dataArrived)window.WRM._dataArrived();</script> <script> window.WRM=window.WRM||{};window.WRM._unparsedData=window.WRM._unparsedData||{};window.WRM._unparsedErrors=window.WRM._unparsedErrors||{}; 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