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added benchmark

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This commit is contained in:
overflowerror 2019-01-21 19:38:41 +01:00
parent 0e511a94c3
commit 113383066d
3 changed files with 105 additions and 4 deletions
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17
Makefile
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@ -1,4 +1,6 @@
CFLAGS = -Wall -fPIC
all: libsfuid.so example
libsfuid.so: lib/sfuid.o
@ -14,9 +16,16 @@ lib/sfuid.o: lib/sfuid.h
%.o: %.c
@echo Compiling $<...
@gcc -Wall -fPIC -c $< -o $@
@gcc ${CFLAGS} -c $< -o $@
benchmark: CFLAGS += -DBENCHMARK
benchmark: clean example
@mv example benchmark
@rm -f lib/*.o
clean:
@rm *.o
@rm lib/*.o
@rm *.so example
@rm -f *.o
@rm -f lib/*.o
@rm -f *.so
@rm -f example
@rm -f benchmark

65
benchmark.sh Executable file
View file

@ -0,0 +1,65 @@
#!/bin/bash
make benchmark
if test $? != 0; then
exit 1
fi
export LD_LIBRARY_PATH=.
iterations=$1
if test "$iterations" = ""; then
iterations=200
fi
resultfile=/dev/shm/$$.result
timefile=/dev/shm/$$.time
encoding=()
decoding=()
minMax() {
tmp=$(sort -g)
echo -n "min: "
echo "$tmp" | head -n 1
echo -n "max: "
echo "$tmp" | tail -n 1
}
standardDeviation() {
awk '{ sum += $1; sumsq += $1 * $1 } END { print "mu: " sum/NR "\nsigma: " sqrt(sumsq/NR - (sum/NR)**2)}'
}
for i in $(seq 0 $iterations); do
echo -n "."
parameter=$RANDOM
./benchmark $2 $parameter 1> $resultfile 2> $timefile
result=$(cat $resultfile)
ns=$(cat $timefile | awk -F: '{ print $2 }' | awk '{ print $1 }')
encoding+=($ns)
./benchmark $2 -d $result 1> $resultfile 2> $timefile
result=$(cat $resultfile)
ns=$(cat $timefile | awk -F: '{ print $2 }' | awk '{ print $1 }')
decoding+=($ns)
if test "$result" != "$parameter"; then
echo
echo "Error on input $parameter. Result: $result"
fi
done
echo
echo
echo "Encoding: "
printf "%s\n" "${encoding[@]}" | minMax
printf "%s\n" "${encoding[@]}" | standardDeviation
echo
echo "Decoding: "
printf "%s\n" "${decoding[@]}" | minMax
printf "%s\n" "${decoding[@]}" | standardDeviation
rm benchmark

27
lib/sfuid.c
View file

@ -331,6 +331,11 @@ int sfuid_encode(uint64_t value, char* string) {
if (!settingsValid)
return SFUID_ERROR_SETTINGS_INVALID;
#ifdef BENCHMARK
struct timespec before, after;
clock_gettime(CLOCK_MONOTONIC, &before);
#endif
value += settings.offset;
if (value > properties.max)
@ -341,10 +346,26 @@ int sfuid_encode(uint64_t value, char* string) {
if (tmp != SFUID_ERROR_NONE)
return tmp;
#ifdef BENCHMARK
clock_gettime(CLOCK_MONOTONIC, &after);
unsigned long long diff = (int64_t)(after.tv_sec - before.tv_sec) * (int64_t) 1000000000UL + (int64_t)(after.tv_nsec - before.tv_nsec);
fprintf(stderr, "Time for conversion: %llu ns\n", diff);
#endif
return SFUID_ERROR_NONE;
}
int sfuid_decode(const char* string, uint64_t* value) {
if (!settingsValid)
return SFUID_ERROR_SETTINGS_INVALID;
#ifdef BENCHMARK
struct timespec before, after;
clock_gettime(CLOCK_MONOTONIC, &before);
#endif
int tmp = convertFromString(string, value);
if (tmp != SFUID_ERROR_NONE)
return tmp;
@ -355,6 +376,12 @@ int sfuid_decode(const char* string, uint64_t* value) {
*value -= settings.offset;
#ifdef BENCHMARK
clock_gettime(CLOCK_MONOTONIC, &after);
unsigned long long diff = (int64_t)(after.tv_sec - before.tv_sec) * (int64_t) 1000000000UL + (int64_t)(after.tv_nsec - before.tv_nsec);
fprintf(stderr, "Time for conversion: %llu ns\n", diff);
#endif
return SFUID_ERROR_NONE;
}