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added latency test

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This commit is contained in:
Jeff Hill
1999-04-29 23:18:27 +00:00
parent a84818d9e6
commit a9d2c3ae3c
1 changed files with 63 additions and 0 deletions
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63
src/ca/catime.c
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@@ -80,6 +80,8 @@ LOCAL tf test_put;
LOCAL tf test_wait;
LOCAL tf test_get;
LOCAL void measure_get_latency (ti *pItems, unsigned iterations);
void timeIt(
tf *pfunc,
ti *pItem,
@@ -165,6 +167,13 @@ int catime (char *channelName, enum appendNumberFlag appNF)
printf ("float test\n");
test (itemList, NELEMENTS(itemList));
for (i=0; i<NELEMENTS(itemList); i++) {
itemList[i].val.fltval = 0.0f;
itemList[i].type = DBR_DOUBLE;
}
printf ("double test\n");
test (itemList, NELEMENTS(itemList));
for (i=0; i<NELEMENTS(itemList); i++) {
strcpy(itemList[i].val.strval, "0.0");
itemList[i].type = DBR_STRING;
@@ -179,6 +188,13 @@ int catime (char *channelName, enum appendNumberFlag appNF)
printf ("integer test\n");
test (itemList, NELEMENTS(itemList));
printf ("round trip jitter test\n");
for (i=0; i<NELEMENTS(itemList); i++) {
itemList[i].val.fltval = 0.0f;
itemList[i].type = DBR_DOUBLE;
}
measure_get_latency (itemList, NELEMENTS(itemList));
printf ("free test\n");
timeIt (test_free, itemList, NELEMENTS(itemList));
@@ -589,3 +605,50 @@ unsigned *pInlineIter
*pInlineIter = 1;
}
/*
* measure_get_latency
*/
LOCAL void measure_get_latency (ti *pItems, unsigned iterations)
{
TS_STAMP end_time;
TS_STAMP start_time;
double delay;
double X = 0u;
double XX = 0u;
double max = DBL_MIN;
double min = DBL_MAX;
double mean;
double stdDev;
ti *pi;
int status;
for (pi=pItems; pi<&pItems[iterations]; pi++) {
tsLocalTime (&start_time);
status = ca_array_get (pi->type, pi->count,
pi->chix, &pi->val);
SEVCHK (status, NULL);
status = ca_pend_io (100.0);
SEVCHK (status, NULL);
tsLocalTime(&end_time);
TsDiffAsDouble(&delay,&end_time,&start_time);
X += delay;
XX += delay*delay;
if (delay>max) {
max = delay;
}
if (delay<min) {
min = delay;
}
}
mean = X/iterations;
stdDev = sqrt (XX/iterations - mean*mean);
printf ("Round trip get delays - mean=%f std dev=%f min=%f max=%f\n",
mean, stdDev, min, max);
}