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 PERFORMANCE REPORTING FACILITY
           Version 1.0
EXTERNAL REFERENCE SPECIFICATION




 Canadian Development Division
  Perform.nee Evaluation Unit




        October l5, 1982
             Revised
        December 9, 1983
             Revised
        February 24,1984




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Performance Reporting Facility ERS
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1.0 PRF DVE: RVI EW




   'ThePerfa rmanee  Rapor ting fae II i tv (PRf) is an   Integrated
   pertorm~nce  reporting package tor NDS/VE. Some portions of PRF
   run on NOS/VE in 180 stlta Mhile the rest of the package
   currently runs in 17Q state under H05/170. PRF is intended to be
   a modular system which can be extended Into a full short and long
   term perform~nc. tracking system.
   The current PRF is based on the PMF hardware option for CY8ER
   190. In the longer term, It wltl accept performance data from
   other sources and maintain 3 performance dateb9se.




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Performance Reporting Fecllity ERS
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1.0 PRf aVE RV I EW
1.1 PMF HARDWAR.E




   The Performance Monitoring Facility (PMF) Is a CyaeR 180 hardware
   GPtion which provides a set or hardware counters and event
   buffers designed to collect performance data about the system.
   Significant hardware states and/or events may be timed and
   counted throuah PMF counters. Data on software events within
   NOS/\/Eandlts product set ma,Y be obtained by insertingkeypoint
   Instructions in the software which may be collected through the
   PHf keyooint buffers. Because PM~ uses a combination of hardware
   and software monitoring techniques, i t is s good example of an
   integrated hybrid performance monitor.


   1.1.1 PMF COUNTERS

   PMF hardware contains eight 32-bit counters which may count
   hardware events and time system st3tes. The list of events and
   states supported is model dependent and there is a se1ection code
   associated with each one. A limited amount of signa' combination
   Is allowed through AlB counter pairings and appropriate control
   qod~s.   Event/state selection and     signa'   combination   are
   control.ed through settings in register 22.




   To be supplied.



   1.1.2   K~ypaINT   INSTRUCTIONS

   Keypoints are special 180 instructions which place an indication
   of significant software events Into the FIFO burfer      In PMf
   hardware or cause a keypoint trap to allow the data to be
   cot'ected by softNare. These Instructions act as NO-OPs to the
   NOS/VE software unless keypoint traps are enabled. In any system
   with the PM~ hardware option, hardware collection rather than
   software collection should be used as there is almost no system
   overhead involved in gathering the performance ~at8.
   Sy   conv!ntion, keypolnts are used to   mark   the   entry   and   exit
                                                   Control Data Private
Performance Reporting Feci 'Ity ERS
                                                            24 Feb 84

1.0 P ftF   aVE RV lEW
1.1.2 KEYPOINT INSTRUCTIONS

    points of major OIS and product set routines, to '11g unusual
    events of high importance, and to indicate significant events for
    debugging. This mechanism provides a very low overhead system
    tracing mechanism as Mell as a performance tracking facility.


    1.1.3 P1F KEY?OINT BUFFER

    PMF hIs a circular event buffer used to hold keypoint data fOf
    co"ection along with an associated time stamp. The exact size
    of this buffer is model-dependent as shown below:
     825       16 keypoJnts
     a         16 keypolnts
     855       16 keypoints
     Theta     1024 keypotnts




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Perforrnanee Reporting faci Iity ERS
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1.0 PRF rnrERVIEW
1.2 PMF DATA COLLECTION




   PMF counter and keypoint dQt~ may be collected by the CPKPNOS
   pro:~ram on NOS/170.     CPKPNOS operates in one of two modes
   depending on whether keypoint coliection is selected or not. If
   keypolnt collection Is not selected, CPKPNOS calls UP e PP
   program (PMF) to initialize counter collection through register
   "   and then the PP program drops out. CPKPNDS must then be
   calted UP again when the counters are to be read out.        If
   keypaint collection is selected, thB PP program will remain
   resident to continuousl, collect the contents of the keypoint
   buffer as i t is being filled.




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Performance Reporting faci lity ERS
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