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mstroh76mstroh76
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Merge pull request WiringPi#311 from WiringPi/test
Unit Test Bench
2 parents f524fdf + 3639bd3 commit 2de08f2

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4 files changed

+198
-6
lines changed

4 files changed

+198
-6
lines changed

‎VERSION‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1 +1 @@
1-
3.13
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3.14

‎version.h‎

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Original file line numberDiff line numberDiff line change
@@ -1,3 +1,3 @@
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#define VERSION "3.13"
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#define VERSION "3.14"
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#define VERSION_MAJOR 3
3-
#define VERSION_MINOR 13
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#define VERSION_MINOR 14

‎wiringPi/test/Makefile‎

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -3,7 +3,7 @@ CFLAGS = -Wall
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LDFLAGS =
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# Need BCM19 <-> BCM26, +PWM: BCM12 <-> BCM13, BCM18 <-> BCM17 connected (1kOhm)
6-
tests = wiringpi_test0_version wiringpi_test1_sysfs wiringpi_test2_sysfs wiringpi_test3_device_wpi wiringpi_test4_device_phys wiringpi_test5_default wiringpi_test6_isr wiringpi_test8_pwm wiringpi_test9_pwm
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tests = wiringpi_test0_version wiringpi_test1_sysfs wiringpi_test2_sysfs wiringpi_test3_device_wpi wiringpi_test4_device_phys wiringpi_test5_default wiringpi_test6_isr wiringpi_test7_bench wiringpi_test8_pwm wiringpi_test9_pwm
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# Need XO hardware
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xotests = wiringpi_xotest_test1_spi wiringpi_i2c_test1_pcf8574 wiringpi_test8_pwm wiringpi_test9_pwm
@@ -13,6 +13,9 @@ pifacetests = wiringpi_piface_test1 wiringpi_test8_pwm wiringpi_test9_pwm
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all: $(tests) $(xotests) $(pifacetests)
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wiringpi_test0_version:
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${CC} ${CFLAGS} wiringpi_test0_version.c -o wiringpi_test0_version -lwiringPi
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wiringpi_test1_sysfs:
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${CC} ${CFLAGS} wiringpi_test1_sysfs.c -o wiringpi_test1_sysfs -lwiringPi
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@@ -31,8 +34,8 @@ wiringpi_test5_default:
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wiringpi_test6_isr:
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${CC} ${CFLAGS} wiringpi_test6_isr.c -o wiringpi_test6_isr -lwiringPi
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34-
wiringpi_test0_version:
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${CC} ${CFLAGS} wiringpi_test0_version.c -o wiringpi_test0_version -lwiringPi
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wiringpi_test7_bench:
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${CC} ${CFLAGS} wiringpi_test7_bench.c -o wiringpi_test7_bench -lwiringPi
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wiringpi_test8_pwm:
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${CC} ${CFLAGS} wiringpi_test8_pwm.c -o wiringpi_test8_pwm -lwiringPi

‎wiringPi/test/wiringpi_test7_bench.c‎

Lines changed: 189 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,189 @@
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// WiringPi test program: benchmark
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// Compile: gcc -Wall wiringpi_test7_bench.c -o wiringpi_test7_bench -lwiringPi
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#include "wpi_test.h"
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//#include <stdio.h>
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//#include <stdlib.h>
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//#include <signal.h>
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#include <string.h>
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#include <time.h>
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#include <sys/time.h>
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int ToggleValue = 240000000;
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float fExpectTimedigitalWrite = 0.1;
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float fExpectTimedigitalRead = 0.1;
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float fExpectTimepinMode = 0.1;
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float fWriteReadDelayFactor = 1.0;
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float fWriteReadFactor = 1.0;
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float fPi4ExpectTimedigitalWrite = 0.020;
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int GPIO = 19;
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int GPIOIN = 26;
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int RaspberryPiModel = -1;
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double ReportElapedTime(const char* msg, int multiop, const float fExpectTime, struct timeval t1, struct timeval t2) {
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double elapsedTime, fTimePerOperation, fFreq;
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elapsedTime = (t2.tv_sec-t1.tv_sec)+(t2.tv_usec-t1.tv_usec)/1000000.0;
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fTimePerOperation = elapsedTime*1000000.0/ToggleValue/multiop;
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fFreq = 1.0f/(fTimePerOperation*2); //ToggleValue/elapsedTime/1000000.0;
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printf(" % 9d took %.3f s, Time per operation %.3f us (toggle Freq %.3f MHz) \n",
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ToggleValue, elapsedTime, fTimePerOperation, fFreq);
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CheckSameFloat(msg, fTimePerOperation, fExpectTime, fExpectTime*0.2f);
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return fTimePerOperation;
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}
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int main (void) {
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struct timeval t1, t2;
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if (wiringPiSetupGpio() == -1) {
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printf("wiringPiSetupGpio failed\n\n");
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exit(EXIT_FAILURE);
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}
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int rev, mem, maker, overVolted;
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piBoardId(&RaspberryPiModel, &rev, &mem, &maker, &overVolted);
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CheckNotSame("Model: ", RaspberryPiModel, -1);
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if (!piBoard40Pin()) {
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GPIO = 23;
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GPIOIN = 24;
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}
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switch(RaspberryPiModel) {
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case PI_MODEL_A:
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case PI_MODEL_B: //ARM=800MHz
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case PI_MODEL_BP:
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case PI_MODEL_AP:
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case PI_MODEL_CM:
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fExpectTimedigitalWrite = 0.132; //us;
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fExpectTimedigitalRead = 0.171; //us
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fExpectTimepinMode = 0.334; //us
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break;
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case PI_MODEL_ZERO:
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case PI_MODEL_ZERO_W: //ARM=1000MHz
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fExpectTimedigitalWrite = 0.104; //us;
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fExpectTimedigitalRead = 0.135; //us
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fExpectTimepinMode = 0.250; //us
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break;
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case PI_MODEL_2:
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ToggleValue /= 4;
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break;
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case PI_MODEL_3B:
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case PI_MODEL_CM3:
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case PI_MODEL_3BP:
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case PI_MODEL_3AP:
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case PI_MODEL_CM3P:
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case PI_MODEL_ZERO_2W:
80+
ToggleValue /= 2;
81+
break;
82+
case PI_MODEL_4B: //ARM=1500MHz
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case PI_MODEL_400:
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case PI_MODEL_CM4:
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case PI_MODEL_CM4S:
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fExpectTimedigitalWrite = 0.020; //us
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fExpectTimedigitalRead = 0.038; //us
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fExpectTimepinMode = 0.121; //us
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fWriteReadDelayFactor = 1.86;
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break;
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default:
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if (piRP1Model()) {
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// So far expect all Pi5 / RP1 hardware has same performance
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printf("Raspberry Pi with RP1 chip found\n");
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fExpectTimedigitalWrite = 0.025; //us
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fExpectTimedigitalRead = 0.323; //us
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fExpectTimepinMode = 0.200; //us
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fWriteReadDelayFactor = 3.2;
99+
} else {
100+
printf("Unknown Raspberry Pi found, exit\n");
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return(EXIT_FAILURE);
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}
103+
break;
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}
105+
fWriteReadFactor = fExpectTimedigitalRead/fExpectTimedigitalWrite;
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ToggleValue /= (fExpectTimedigitalWrite/fPi4ExpectTimedigitalWrite);
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108+
printf("WiringPi GPIO operation time test program (using GPIO %d/%d)\n", GPIO, GPIOIN);
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pinMode(GPIO, OUTPUT);
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printf("\n% 3d million times digitalWrite ...\n", ToggleValue/1000000);
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gettimeofday(&t1, NULL);
113+
for (int loop=1; loop<ToggleValue; loop++) {
114+
digitalWrite(GPIO, HIGH);
115+
digitalWrite(GPIO, LOW);
116+
}
117+
gettimeofday(&t2, NULL);
118+
double OpTimeWrite = ReportElapedTime("digitalWrite", 2, fExpectTimedigitalWrite, t1, t2);
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120+
digitalWrite(GPIO, LOW);
121+
pinMode(GPIOIN, INPUT);
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123+
ToggleValue /=(fExpectTimedigitalRead/fExpectTimedigitalWrite);
124+
printf("\n% 3d million times digitalRead ...\n", ToggleValue/1000000);
125+
gettimeofday(&t1, NULL);
126+
for (int loop=1; loop<ToggleValue; loop++) {
127+
digitalRead(GPIOIN);
128+
digitalRead(GPIOIN);
129+
}
130+
gettimeofday(&t2, NULL);
131+
double OpTimeRead = ReportElapedTime("digitalRead", 2, fExpectTimedigitalRead, t1, t2);
132+
133+
if (!piRP1Model()) {
134+
ToggleValue /= 4;
135+
} else {
136+
ToggleValue *= 1.5;
137+
}
138+
printf("\n% 3d million times pinMode...\n", ToggleValue/1000000);
139+
gettimeofday(&t1, NULL);
140+
for (int loop=1; loop<ToggleValue; loop++) {
141+
pinMode(GPIO, OUTPUT);
142+
pinMode(GPIOIN, INPUT);
143+
}
144+
gettimeofday(&t2, NULL);
145+
ReportElapedTime("pinMode", 2, fExpectTimepinMode, t1, t2);
146+
147+
printf("\nToggle % 3d million times pinMode and digitalWrite ..\n", ToggleValue/1000000);
148+
gettimeofday(&t1, NULL);
149+
for (int loop=1; loop<ToggleValue; loop++) {
150+
pinMode(GPIO, OUTPUT);
151+
digitalWrite(GPIO, LOW);
152+
digitalWrite(GPIO, HIGH);
153+
pinMode(GPIO, INPUT);
154+
}
155+
gettimeofday(&t2, NULL);
156+
ReportElapedTime("pinMode and digitalWrite", 2, fExpectTimepinMode+fExpectTimedigitalWrite, t1, t2);
157+
158+
if (!piRP1Model()) {
159+
ToggleValue *= 1.5;
160+
} else {
161+
ToggleValue /= 5;
162+
}
163+
pinMode(GPIO, OUTPUT);
164+
printf("\nToggle % 3d million times digitalRead and digitalWrite ..\n", ToggleValue/1000000);
165+
gettimeofday(&t1, NULL);
166+
for (int loop=1; loop<ToggleValue; loop++) {
167+
digitalWrite(GPIO, HIGH);
168+
digitalRead(GPIOIN);
169+
digitalWrite(GPIO, LOW);
170+
digitalRead(GPIOIN);
171+
}
172+
gettimeofday(&t2, NULL);
173+
double fTimePerOperation = ReportElapedTime("digitalRead and digitalWrite", 2, (fExpectTimedigitalWrite+fExpectTimedigitalRead)*fWriteReadDelayFactor, t1, t2);
174+
175+
printf("\n");
176+
CheckSameFloat("digitalWrite vs. digitalRead factor", OpTimeRead/OpTimeWrite, fWriteReadFactor, 0.3);
177+
CheckSameFloat("digitalWrite and digitalRead alternating factor", fTimePerOperation/(fExpectTimedigitalWrite+fExpectTimedigitalRead), fWriteReadDelayFactor, 0.2);
178+
if (piRP1Model()) {
179+
printf("\nRasperry Pi with RP1 chip:\n");
180+
printf(" * digitalRead has very slow speed, much slower then digitalWrite, factor %.1f (typical Pi4 ~1.9)\n", fWriteReadFactor);
181+
printf(" * Alternating read/write operation has slow speed, factor %.2f (typical Pi4 ~1.86) to single operation time\n", fWriteReadDelayFactor);
182+
}
183+
184+
digitalWrite(GPIO, LOW);
185+
pinMode(GPIO, INPUT);
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return(EXIT_SUCCESS);
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}
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