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  1. Data Management
  2. DM-20702

Create memory usage metric

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    Details

    • Type: Improvement
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: ap_verify, verify
    • Labels:
      None
    • Story Points:
      2
    • Sprint:
      AP F19-3 (Skipped)
    • Team:
      Alert Production

      Description

      Create a MetricTask that captures the MaxResidentSetSize from timeMethod. The task can be written by cargo-culting lsst.verify.tasks.TimingMetricTask. Add metrics for ApPipeTask and its direct subtasks to the default ap_verify config. Note that astropy supports data size units.

      One outstanding question is how to define aggregation (which is still the responsibility of the MetricTask for now). For running time across multiple CCDs a sum is the natural choice; it's less natural for memory usage because the aggregated data IDs weren't necessarily run together.

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            krzys Krzysztof Findeisen added a comment -

            One suggestion I've received is that the memory usage metric, when calculated over multiple visits/ccds/patches/etc., should give the maximum memory usage across units of work rather than the sum. The reasoning is that the most expensive run is the one that will actually limit the system.

            Show
            krzys Krzysztof Findeisen added a comment - One suggestion I've received is that the memory usage metric, when calculated over multiple visits/ccds/patches/etc., should give the maximum memory usage across units of work rather than the sum. The reasoning is that the most expensive run is the one that will actually limit the system.
            Hide
            krzys Krzysztof Findeisen added a comment - - edited

            Testing shows that it's not useful to define this metric for subtasks; the "maximum" in MaxResidentSetSize is over an entire processing run, so you get output like:

                                ap_pipe.ApPipeMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'})
                         pipe_tasks.ProcessCcdMemory = 909975552.0 byte ({'estimator': 'pipe.base.timeMethod'})
                    pipe_tasks.ImageDifferenceMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'})
                    ap_association.AssociationMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'})
            

            I'll keep the metric definitions, in case they're useful when running e.g. ProcessCcdTask from the command line, but will only measure ApPipeMemory for our ap_verify runs.

            (Fortunately, it does track different processes separately.)

            Show
            krzys Krzysztof Findeisen added a comment - - edited Testing shows that it's not useful to define this metric for subtasks; the "maximum" in MaxResidentSetSize is over an entire processing run, so you get output like: ap_pipe.ApPipeMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'}) pipe_tasks.ProcessCcdMemory = 909975552.0 byte ({'estimator': 'pipe.base.timeMethod'}) pipe_tasks.ImageDifferenceMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'}) ap_association.AssociationMemory = 1954844672.0 byte ({'estimator': 'pipe.base.timeMethod'}) I'll keep the metric definitions, in case they're useful when running e.g. ProcessCcdTask from the command line, but will only measure ApPipeMemory for our ap_verify runs. (Fortunately, it does track different processes separately.)
            Hide
            krzys Krzysztof Findeisen added a comment - - edited

            Hello Hsin-Fang Chiang, would you be willing to review this ticket? It's about 350 lines across three packages. Thank you!

            Show
            krzys Krzysztof Findeisen added a comment - - edited Hello Hsin-Fang Chiang , would you be willing to review this ticket? It's about 350 lines across three packages. Thank you!
            Hide
            hchiang2 Hsin-Fang Chiang added a comment -

            I'm only learning about the verify framework as I review this, but overall it looks good to me. Thanks for adding this useful metric!

            Show
            hchiang2 Hsin-Fang Chiang added a comment - I'm only learning about the verify framework as I review this, but overall it looks good to me. Thanks for adding this useful metric!

              People

              Assignee:
              krzys Krzysztof Findeisen
              Reporter:
              krzys Krzysztof Findeisen
              Reviewers:
              Hsin-Fang Chiang
              Watchers:
              Hsin-Fang Chiang, John Parejko, Krzysztof Findeisen
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

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                Updated:
                Resolved:

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