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Foundation ::
Programming Tools ::
Perfmon
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Limitations
The following limitations currently pertain to Perfmon:
- The Performance Monitor program only pertains to environments running the VxWorks operating system on PPC750 platforms.
- The mon_Install command must be successfully issued before any other Perfmon command is given.
- A limit of 500 tasks overall is imposed, with 200 of these permitted prior to the mon_Install command. These limits are easily changed in source code.
- The Perfmon print-task (tMonPrint) runs at the (low) priority of 240, and should be adjusted as necessary (in source code) if user tasks would prevent it from running.
- The Perfmon idle-task runs (tMonIdle) at the lowest priority of 255. This should not conflict with a user idle-task running at the same priority. However, the Perfmon idle-task must be allowed to run if valid task stack high water mark statistics are to be collected.
- There is not at present a mon_Uninstall command.
- A minimum value of 2 seconds is imposed for the statistics collection and display time interval.
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