Stage 1 reorganization

Directory moves. src/RTEMS/ => src/libCom/RTEMS/ src/as/ => src/ioc/as/ src/bpt/ => src/ioc/bpt/ src/ca/ => src/ca/client/ src/cap5/ => src/ca/client/perl/ src/cas/ => src/ca/legacy/pcas/ src/catools/ => src/ca/client/tools/ src/db/ => src/ioc/db/ src/dbStatic/ => src/ioc/dbStatic/ src/dbtools/ => src/ioc/dbtemplate/ src/dev/softDev/ => src/std/dev/ src/dev/testDev/ => src/std/test/ src/excas/ => src/ca/legacy/pcas/ex/ src/gdd/ => src/ca/legacy/gdd/ src/makeBaseApp/ => src/template/base/ src/makeBaseExt/ => src/template/ext/ src/misc/ => src/ioc/misc/ src/rec/ => src/std/rec/ src/registry/ => src/ioc/registry/ src/rsrv/ => src/ioc/rsrv/ src/softIoc/ => src/std/softIoc/ src/toolsComm/ => src/libCom/tools/
2010-12-16 15:15:52 -05:00
parent 4a18db9f99
commit 2a36a3906d
748 changed files with 0 additions and 0 deletions
--- a/src/ca/client/caEventRate.cpp
+++ b/src/ca/client/caEventRate.cpp
@@ -0,0 +1,139 @@
+/*************************************************************************\
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution. 
+\*************************************************************************/
+
+#include <stdio.h>
+#include <limits.h>
+#include <math.h>
+
+#include "cadef.h"
+#include "dbDefs.h"
+#include "epicsTime.h"
+#include "errlog.h"
+
+/*
+ * event_handler()
+ */
+extern "C" void eventCallBack ( struct event_handler_args args )
+{
+    unsigned *pCount = static_cast < unsigned * > ( args.usr );
+    (*pCount)++;
+}
+
+/*
+ * caEventRate ()
+ */
+void caEventRate ( const char *pName, unsigned count )
+{
+    static const double initialSamplePeriod = 1.0;
+    static const double maxSamplePeriod = 60.0 * 5.0;
+    unsigned eventCount = 0u;
+
+    chid * pChidTable = new chid [ count ];
+
+    {
+        printf ( "Connecting to CA Channel \"%s\" %u times.", 
+                    pName, count );
+        fflush ( stdout );
+    
+        epicsTime begin = epicsTime::getCurrent ();
+        for ( unsigned i = 0u; i < count; i++ ) {
+            int status = ca_search ( pName,  & pChidTable[i] );
+            SEVCHK ( status, NULL );
+        }
+    
+        int status = ca_pend_io ( 10000.0 );
+        if ( status != ECA_NORMAL ) {
+            fprintf ( stderr, " not found.\n" );
+            return;
+        }
+        epicsTime end = epicsTime::getCurrent ();
+    
+        printf ( " done(%f sec).\n", end - begin );
+    }
+
+    {
+        printf ( "Subscribing %u times.", count );
+        fflush ( stdout );
+        
+        epicsTime begin = epicsTime::getCurrent ();
+        for ( unsigned i = 0u; i < count; i++ ) {
+            int addEventStatus = ca_add_event ( DBR_FLOAT, 
+                pChidTable[i], eventCallBack, &eventCount, NULL);
+            SEVCHK ( addEventStatus, __FILE__ );
+        }
+    
+        int status = ca_flush_io ();
+        SEVCHK ( status, __FILE__ );
+    
+        epicsTime end = epicsTime::getCurrent ();
+    
+        printf ( " done(%f sec).\n", end - begin );
+    }
+        
+    {
+        printf ( "Waiting for initial value events." );
+        fflush ( stdout );
+    
+        // let the first one go by 
+        epicsTime begin = epicsTime::getCurrent ();
+        while ( eventCount < count ) {
+            int status = ca_pend_event ( 0.01 );
+            if ( status != ECA_TIMEOUT ) {
+                SEVCHK ( status, NULL );
+            }
+        }
+        epicsTime end = epicsTime::getCurrent ();
+    
+        printf ( " done(%f sec).\n", end - begin );
+    }
+
+    double samplePeriod = initialSamplePeriod;
+    double X = 0.0;
+    double XX = 0.0;
+    unsigned N = 0u;
+    while ( true ) {
+        unsigned nEvents, lastEventCount, curEventCount;
+
+        epicsTime beginPend = epicsTime::getCurrent ();
+        lastEventCount = eventCount;
+        int status = ca_pend_event ( samplePeriod );
+        curEventCount = eventCount;
+        epicsTime endPend = epicsTime::getCurrent ();
+        if ( status != ECA_TIMEOUT ) {
+            SEVCHK ( status, NULL );
+        }
+
+        if ( curEventCount >= lastEventCount ) {
+            nEvents = curEventCount - lastEventCount;
+        }
+        else {
+            nEvents = ( UINT_MAX - lastEventCount ) + curEventCount + 1u;
+        }
+
+        N++;
+
+        double period = endPend - beginPend;
+        double Hz = nEvents / period;
+
+        X += Hz;
+        XX += Hz * Hz;
+
+        double mean = X / N;
+        double stdDev = sqrt ( XX / N - mean * mean );
+
+        printf ( "CA Event Rate (Hz): current %g mean %g std dev %g\n", 
+            Hz, mean, stdDev );
+
+        if ( samplePeriod < maxSamplePeriod ) {
+            samplePeriod += samplePeriod;
+        }
+    }
+}
+