{"action":"opened","issue":{"url":"https://api.github.com/repos/cadets/freebsd/issues/69","repository_url":"https://api.github.com/repos/cadets/freebsd","labels_url":"https://api.github.com/repos/cadets/freebsd/issues/69/labels{/name}","comments_url":"https://api.github.com/repos/cadets/freebsd/issues/69/comments","events_url":"https://api.github.com/repos/cadets/freebsd/issues/69/events","html_url":"https://github.com/cadets/freebsd/issues/69","id":220703636,"number":69,"title":"Buflimit branch DTrace testing crashes machine","user":{"login":"ivonchyk","id":7460833,"avatar_url":"https://avatars2.githubusercontent.com/u/7460833?v=3","gravatar_id":"","url":"https://api.github.com/users/ivonchyk","html_url":"https://github.com/ivonchyk","followers_url":"https://api.github.com/users/ivonchyk/followers","following_url":"https://api.github.com/users/ivonchyk/following{/other_user}","gists_url":"https://api.github.com/users/ivonchyk/gists{/gist_id}","starred_url":"https://api.github.com/users/ivonchyk/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ivonchyk/subscriptions","organizations_url":"https://api.github.com/users/ivonchyk/orgs","repos_url":"https://api.github.com/users/ivonchyk/repos","events_url":"https://api.github.com/users/ivonchyk/events{/privacy}","received_events_url":"https://api.github.com/users/ivonchyk/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"gvnn3","id":2567712,"avatar_url":"https://avatars1.githubusercontent.com/u/2567712?v=3","gravatar_id":"","url":"https://api.github.com/users/gvnn3","html_url":"https://github.com/gvnn3","followers_url":"https://api.github.com/users/gvnn3/followers","following_url":"https://api.github.com/users/gvnn3/following{/other_user}","gists_url":"https://api.github.com/users/gvnn3/gists{/gist_id}","starred_url":"https://api.github.com/users/gvnn3/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gvnn3/subscriptions","organizations_url":"https://api.github.com/users/gvnn3/orgs","repos_url":"https://api.github.com/users/gvnn3/repos","events_url":"https://api.github.com/users/gvnn3/events{/privacy}","received_events_url":"https://api.github.com/users/gvnn3/received_events","type":"User","site_admin":false},"assignees":[{"login":"gvnn3","id":2567712,"avatar_url":"https://avatars1.githubusercontent.com/u/2567712?v=3","gravatar_id":"","url":"https://api.github.com/users/gvnn3","html_url":"https://github.com/gvnn3","followers_url":"https://api.github.com/users/gvnn3/followers","following_url":"https://api.github.com/users/gvnn3/following{/other_user}","gists_url":"https://api.github.com/users/gvnn3/gists{/gist_id}","starred_url":"https://api.github.com/users/gvnn3/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gvnn3/subscriptions","organizations_url":"https://api.github.com/users/gvnn3/orgs","repos_url":"https://api.github.com/users/gvnn3/repos","events_url":"https://api.github.com/users/gvnn3/events{/privacy}","received_events_url":"https://api.github.com/users/gvnn3/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2017-04-10T16:43:43Z","updated_at":"2017-04-10T16:43:43Z","closed_at":null,"body":"copied from original email about issue:\r\n\r\nWhen I instrument too many probes causing a large numbers of drops with a command like \r\n\r\nsudo dtrace -q -o /dev/null -s print/256mb_probes.d -x bufsize=63m -x buflimit=25 -c \"sh wget_256mb.sh\"\r\n\r\ndtrace reports a large number of drops followed by \"dtrace: processing aborted: Abort due to systemic unresponsiveness\". In my understanding, this is a response to DTrace consuming too many resources.\r\n\r\nWhen I ran a script (see below for code) that would call a dtrace command causing the above mentioned process aborting multiple times in a row, the machine that I was running the script on would crash and require a reboot. When I ran the process-aborting dtrace commands several times in a row manually, the machine did not crash, however...\r\n\r\nscript code:\r\n\r\n#!/bin/sh\r\n\r\nki=25\r\nfor k in `seq 1 2`\r\ndo\r\n\r\necho \"Running with buflimit = ${ki}\"\r\nsudo dtrace -q -o /dev/null -s print/1gb_probes.d -x bufsize=63m -x switchrate=128hz -x buflimit=\"${ki}\" -c \"sh wget_1gb.sh\" 2>&1 | tee -a \"buflimit_test_outputs/result.${ki}.txt\"\r\n\r\necho \"sleeping\"\r\nsleep 5\r\nsudo dtrace -q -o /dev/null -s print/1gb_probes.d -x bufsize=63m -x switchrate=128hz -x buflimit=\"${ki}\" -c \"sh wget_1gb.sh\" 2>&1 | tee -a \"buflimit_test_outputs/result.${ki}.txt\"\r\n\r\necho \"sleeping\"\r\nsleep 5\r\nsudo dtrace -q -o /dev/null -s print/1gb_probes.d -x bufsize=63m -x switchrate=128hz -x buflimit=\"${ki}\" -c \"sh wget_1gb.sh\" 2>&1 | tee -a \"buflimit_test_outputs/result.${ki}.txt\"\r\n\r\nki=$(($ki + 25))\r\n\r\ndone"}}
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