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Lou DeGenaro edited comment on UIMA-5047 at 10/25/16 7:52 PM: -------------------------------------------------------------- Modify the following to support cgroups cpu reporting flag: - NodeMetricsUpdateDuccEvent was (Author: lou.degenaro): Modify the following to support cgroups cpu reporting flag: - DefaultNodeMetricsProcessor - LinuxNodeMetricsProcesor - DuccNode - Node - NodeMetricsUpdateDuccEvent > UIMA-DUCC: refactor agent code which gathers node and process metrics > --------------------------------------------------------------------- > > Key: UIMA-5047 > URL: https://issues.apache.org/jira/browse/UIMA-5047 > Project: UIMA > Issue Type: Improvement > Components: DUCC > Reporter: Jerry Cwiklik > Assignee: Jerry Cwiklik > Fix For: 2.2.0-Ducc > > > Currently agent fetches metrics from different sources including /proc file > system, top, ps, etc. The files found in /proc file system don't have fixed > structure across Linux platforms causing some metrics to be missing or be > wrong. Also scrapping lnx commands may not be 100% reliable as well > Change the code to fetch CPU metrics from cgroups. For reporting the CPU, the > agent needs to look at cgroups cpuacct.stat file. > Agent will collect process CPU usage when > a) cgroups are ON. > b) cgroups accounting is configured in cgconfig > > Agent publishes -1 ( read: N/A) if cgroups are OFF or accounting is OFF. > Agent will: > a) fetch the CPU from cgroups accounting as a sum of CPU spent in both > user and system mode. > These are separately maintained counts in cgroups. > b) agent should publish delta (subtracting current from previous reading) > > Agent will continue to include two CPU values as part of its inventory > publication: > 1) Total CPU used by a process from the time it started. This value is > used by the webserver to show CPU usage when a process terminates. > 2) "Current" CPU used be a process. This is a delta computed as described > in 2c above. This value is shown by the webserver while the process is > running. -- This message was sent by Atlassian JIRA (v6.3.4#6332)