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./compactsnoop\\r\\n COMM PID NODE ZONE ORDER MODE LAT(ms) STATUS\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.025444 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 3.925823 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 113.975603 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 81.57143 complete\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.02774 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 4.631926 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 113.975706 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 80.647534 complete\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.020838 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 3.367714 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 115.18123 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 81.766559 complete\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.025587 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 4.346871 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 114.570453 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 80.820001 complete\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.026747 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 4.611412 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 113.993654 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 80.928759 complete\\r\\n zsh 23685 0 ZONE_DMA -1 SYNC 0.02789 complete\\r\\n zsh 23685 0 ZONE_DMA32 -1 SYNC 3.889023 complete\\r\\n zsh 23685 0 ZONE_NORMAL -1 SYNC 113.776424 complete\\r\\n zsh 23685 1 ZONE_NORMAL -1 SYNC 80.727358 complete\\r\\n ^C\\r\\n```\\r\\n\\r\\n While tracing, the processes alloc pages due to memory fragmentation is too\\r\\n serious to meet contiguous memory requirements in the system, compact zone\\r\\n events happened, which will increase the waiting delay of the processes.\\r\\n\\r\\n compactsnoop can be useful for discovering when compact_stall(/proc/vmstat)\\r\\n continues to increase, whether it is caused by some critical processes or not.\\r\\n\\r\\n\\r\\nWhen enable extern fields, it also shows node's zone's order's frag index and zone's watermark:\\r\\n\\r\\nThe -e option prints out extra columns\\r\\n\\r\\n```\\r\\n # ./compactsnoop -e\\r\\n COMM PID NODE ZONE ORDER MODE FRAGIDX MIN LOW HIGH FREE LAT(ms) STATUS\\r\\n summ 28276 1 ZONE_NORMAL 3 ASYNC 0.728 11284 14105 16926 14193 3.58428 partial\\r\\n summ 28276 0 ZONE_NORMAL 2 ASYNC -1.000 11043 13803 16564 14479 0.0263 complete\\r\\n summ 28276 1 ZONE_NORMAL 2 ASYNC -1.000 11284 14105 16926 14785 0.019004 complete\\r\\n summ 28276 0 ZONE_NORMAL 2 ASYNC -1.000 11043 13803 16564 15199 0.006467 partial\\r\\n summ 28276 1 ZONE_NORMAL 2 ASYNC -1.000 11284 14105 16926 17360 0.030806 complete\\r\\n summ 28276 0 ZONE_NORMAL 2 ASYNC -1.000 11043 13803 16564 15443 0.024644 complete\\r\\n summ 28276 1 ZONE_NORMAL 2 ASYNC -1.000 11284 14105 16926 15634 0.018882 complete\\r\\n summ 28276 1 ZONE_NORMAL 3 ASYNC 0.832 11284 14105 16926 15301 0.006826 partial\\r\\n summ 28276 0 ZONE_NORMAL 2 ASYNC -1.000 11043 13803 16564 14774 0.005991 partial\\r\\n summ 28276 1 ZONE_NORMAL 3 ASYNC 0.733 11284 14105 16926 19888 0.012343 partial\\r\\n ^C\\r\\n```\\r\\n\\r\\nThe -K option prints out kernel stack\\r\\n\\r\\n ```\\r\\n# ./compactsnoop -K -e\\r\\n\\r\\n summ 28276 0 ZONE_NORMAL 3 ASYNC 0.528 11043 13803 16564 22654 13.258874 partial\\r\\n kretprobe_trampoline+0x0\\r\\n try_to_compact_pages+0x121\\r\\n __alloc_pages_direct_compact+0xac\\r\\n __alloc_pages_slowpath+0x3e9\\r\\n __alloc_pages_nodemask+0x404\\r\\n alloc_pages_current+0x98\\r\\n new_slab+0x2c5\\r\\n ___slab_alloc+0x3ac\\r\\n __slab_alloc+0x40\\r\\n kmem_cache_alloc_node+0x8b\\r\\n copy_process+0x18e\\r\\n do_fork+0x91\\r\\n sys_clone+0x16\\r\\n stub_clone+0x44\\r\\n\\r\\n summ 28276 1 ZONE_NORMAL 3 ASYNC -1.000 11284 14105 16926 22074 0.008713 partial\\r\\n kretprobe_trampoline+0x0\\r\\n try_to_compact_pages+0x121\\r\\n __alloc_pages_direct_compact+0xac\\r\\n __alloc_pages_slowpath+0x3e9\\r\\n __alloc_pages_nodemask+0x404\\r\\n alloc_pages_current+0x98\\r\\n new_slab+0x2c5\\r\\n ___slab_alloc+0x3ac\\r\\n __slab_alloc+0x40\\r\\n kmem_cache_alloc_node+0x8b\\r\\n copy_process+0x18e\\r\\n do_fork+0x91\\r\\n sys_clone+0x16\\r\\n stub_clone+0x44\\r\\n```" }, { "_class" : "hudson.model.StringParameterValue", "name" : "ghprbCommentBody", "value" : "[buildbot, ok to test]" }, { "_class" : "hudson.model.StringParameterValue", "name" : "ghprbGhRepository", "value" : "iovisor/bcc" }, { "_class" : "hudson.model.StringParameterValue", "name" : "ghprbCredentialsId", "value" : "6d3daf13-69b8-48b1-9c8f-ec5353264113" } ] }, { "_class" : "hudson.plugins.git.GitTagAction" }, { }, { }, { "_class" : "org.jenkinsci.plugins.displayurlapi.actions.RunDisplayAction" } ], "artifacts" : [ ], "building" : False, "description" : "PR #2582: add tool: compactsnoop", "displayName" : "#113", "duration" : 1444258, "estimatedDuration" : 7460664, "executor" : None, "fullDisplayName" : "bcc-pr #113", "id" : "113", "keepLog" : False, "number" : 113, "queueId" : 925, "result" : "SUCCESS", "timestamp" : 1573260897567, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/113/", "builtOn" : "", "changeSet" : { "_class" : "hudson.plugins.git.GitChangeSetList", "items" : [ ], "kind" : "git" }, "culprits" : [ ], "runs" : [ { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc25/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc26/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc27/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc28/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1604/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1710/113/" }, { "number" : 113, "url" : "https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1804/113/" } ] }