115 lines
4.2 KiB
C
115 lines
4.2 KiB
C
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#ifndef h_perfdata
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#define h_perfdata
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/****************************************************************************
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*
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* perfdata.h - UniVerse Performance Data
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*
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* Module %M% Version %I% Date %H%
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*
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* (c) Copyright 1998 Ardent Software Inc. - All Rights Reserved
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* This is unpublished proprietary source code of Ardent Software Inc.
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* The copyright notice above does not evidence any actual or intended
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* publication of such source code.
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*
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*******************************************************************************
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*
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* Maintenence log - insert most recent change descriptions at top
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*
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* Date.... GTAR# WHO Description.........................................
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* 10/14/98 23801 SAP Change copyrights.
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* 04/25/97 20510 AGM Module created
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*
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******************************************************************************/
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/******************************************************************************
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*
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* Any change to this file should also be reflected in:
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*
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* WINNT/uvntperf.h
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* WINNT/uvntperf.ini
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* WINNT/uvntperf.c
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*
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******************************************************************************/
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/*
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* This file contains the definition of the perfromance data that
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* UniVerse can maintain if the UV_PERFORMANCE_DATA token is defined
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* in hardwareh.smp
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*
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* The structure that contains the actual data is added to the end of
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* the main disk shared memory segment when the token is defined and
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* various sections of the code set the counts as things change.
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*
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* Any UniVerse process can change the data in this structure. There is
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* no special semaphore used to maintain the integrity of the data
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* (I.e. prevent mutiple processes accessing it at the same time). This is
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* because we do not want to effect the performance of UniVerse by
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* requiring that semaphores be obtained in order to update the data.
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*
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* Instead of a performance semaphore we rely on the fact that some
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* other UniVerse concurrency semaphore will be held when the performance
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* data is changed. For example, data relating to the group locks will
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* only be changed when the group lock semaphore is held. The exception
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* to this is the user defined data items where there will be no concurency
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* control at all. BASIC programs should implement this themselves if they
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* want it.
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*
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* No concurrency control is used when reading this data. Each item is
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* a 'snapshot' at the point at which it is read and no consistency
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* bewteen values is guaranteed.
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*/
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#ifdef UV_PERFORMANCE_DATA
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/*
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* This structure defines most of the items items that make up the
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* performance data. It may not be possible to gather/maintain all
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* of these items on all systems. Additional data is extracted from
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* other items in the main shared memory segment (E.g. log file size)
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*/
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#define UVPERF_N_USER_CTRS 5
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typedef struct
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{
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int nProcesses; /* Total UV processes (parents+children+ etc) */
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int nLeaders; /* Number of parent UV processes */
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int t30usedSlots; /* Number of t30table slots used */
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int t30refsTotal; /* Total number of opens on T30s (refs) */
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int t30splits; /* Number of splits on T30 files */
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int t30merges; /* Number of merges on T30 files */
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struct Dstats fileStats; /* From DBFILE.h - file statistics */
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int userCounter[UVPERF_N_USER_CTRS]; /* Set from BASIC progs */
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} PERF_DATA;
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/*
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* These macros should be used to increment/decrement/set the
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* various performance counters. For the time being there is no
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* concurrency control here... we are changing shared memory without
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* taking any special lock. This is considered ok for the time
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* being as the performance data is not critical... it does not
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* matter if it is incorrect! Should it be deemed necessary to
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* ensure the accuracy (at a penalty of overall system performance)
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* then these macros should be modified to use atmoic operations
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* or take a 'performance monitor' semaphore.
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*/
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#define INC_PERF_CTR(X) ((DBshmseg->perfdata.X)++)
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#define DEC_PERF_CTR(X) ((DBshmseg->perfdata.X)--)
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#define SET_PERF_CTR(X, Y) (DBshmseg->perfdata.X = Y)
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#else
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/* No performance instrumentation... */
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#define INC_PERF_CTR(X)
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#define DEC_PERF_CTR(X)
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#define SET_PERF_CTR(X, Y)
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#endif
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#endif
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/* End of Module */
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