[jira] [Commented] (TS-3436) Add milestone data for API times

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-3436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14541956#comment-14541956 ] 

ASF GitHub Bot commented on TS-3436:
------------------------------------

Github user SolidWallOfCode closed the pull request at:

    https://github.com/apache/trafficserver/pull/178


> Add milestone data for API times
> --------------------------------
>
>                 Key: TS-3436
>                 URL: https://issues.apache.org/jira/browse/TS-3436
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Alan M. Carroll
>            Assignee: Alan M. Carroll
>             Fix For: 6.0.0
>
>
> Add two new milestones that track API time, "active" and "total". These are reasonably equivalent to "wall clock time" and "cpu time" concepts for process. The total time measures how long, in real time, a transaction spends involved with API callouts in plugins. The active time tracks the amount of time spent in an API callout. When these two values are different this means time is being spent either in lock contention to run the plugin continuation or waiting for the plugin to re-enable the transaction. Originally I had just the "total" counter but I think the ability to detect contention and wait is very valuable.
> The values are a bit odd - they are the actual amount of time spent plus the start time of the state machine. I debated for a while about that with some other contributors and the concenssus was that overall the best option because it makes those milestones behave exactly like all the others (e.g., you subtract sm_start to get the real value).



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