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[v1.01] Remove useless frequency measurement (SSE and novector should report the same frequency!). Increase iterations to improve precision

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Dr-Noob
2021-11-20 10:13:35 +01:00
parent 2fce2c9f52
commit 4b50740516
6 changed files with 3 additions and 62 deletions
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5
Makefile
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@@ -19,7 +19,7 @@ ifneq ($(OS),Windows_NT)
os := $(shell uname -s)
ifeq ($(os), Linux)
SOURCE += $(SRC_DIR)freq/freq.c freq_nov.o freq_sse.o freq_avx.o freq_avx512.o
SOURCE += $(SRC_DIR)freq/freq.c freq_nov.o freq_avx.o freq_avx512.o
HEADERS += $(SRC_DIR)freq/freq.h
CFLAGS += -pthread
endif
@@ -73,9 +73,6 @@ strict: $(OUTPUT)
freq_nov.o: Makefile $(SRC_DIR)freq/freq_nov.c $(SRC_DIR)freq/freq_nov.h
$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -pthread $(SRC_DIR)freq/freq_nov.c -o $@
freq_sse.o: Makefile $(SRC_DIR)freq/freq_sse.c $(SRC_DIR)freq/freq_sse.h
$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -msse -pthread $(SRC_DIR)freq/freq_sse.c -o $@
freq_avx.o: Makefile $(SRC_DIR)freq/freq_avx.c $(SRC_DIR)freq/freq_avx.h
$(CC) $(CFLAGS) $(SANITY_FLAGS) -c -mavx -mfma -pthread $(SRC_DIR)freq/freq_avx.c -o $@

2
src/common/main.c
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@@ -33,7 +33,7 @@
static const char* OS_STR = "Unknown OS";
#endif
static const char* VERSION = "1.00";
static const char* VERSION = "1.01";
void print_help(char *argv[]) {
const char **t = args_str;

6
src/x86/freq/freq.c
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@@ -5,7 +5,6 @@
#include "../uarch.h"
#include "freq.h"
#include "freq_nov.h"
#include "freq_sse.h"
#include "freq_avx.h"
#include "freq_avx512.h"
@@ -102,11 +101,6 @@ int64_t measure_frequency(struct cpuInfo* cpu) {
compute_function = compute_avx;
num_spaces = 42;
}
else if(cpu->feat->SSE) {
printf("cpufetch is measuring the SSE frequency...");
compute_function = compute_sse;
num_spaces = 42;
}
else {
printf("cpufetch is measuring the frequency (no vector instructions)...");
compute_function = compute_nov;

2
src/x86/freq/freq.h
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@@ -5,7 +5,7 @@
#include "../../common/cpu.h"
#define MEASURE_TIME_SECONDS 5
#define LOOP_ITERS 100000000
#define LOOP_ITERS 1000000000
int64_t measure_frequency(struct cpuInfo* cpu);

44
src/x86/freq/freq_sse.c
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@@ -1,44 +0,0 @@
#include <stdio.h>
#include <immintrin.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <stdint.h>
#include "freq.h"
void* compute_sse() {
bool end = false;
struct timeval begin, now;
__m128 a = _mm_set1_ps(1.5);
__m128 b = _mm_set1_ps(1.2);
__m128 c = _mm_set1_ps(0.0);
gettimeofday(&begin, NULL);
while(!end) {
for(uint64_t i=0; i < LOOP_ITERS; i++) {
c = _mm_add_ps(a, b);
}
gettimeofday(&now, NULL);
double elapsed = (now.tv_sec - begin.tv_sec) + ((now.tv_usec - begin.tv_usec)/1000000.0);
end = elapsed >= (double) MEASURE_TIME_SECONDS;
}
FILE* fp = fopen("/dev/null", "w");
if(fp == NULL) {
printf("fopen: %s", strerror(errno));
}
else {
fprintf(fp, "%f", c[0]);
fclose(fp);
}
return NULL;
}

6
src/x86/freq/freq_sse.h
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@@ -1,6 +0,0 @@
#ifndef __FREQ_SSE__
#define __FREQ_SSE__
void* compute_sse();
#endif