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

src/x86/freq/freq.c

@@ -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;

src/x86/freq/freq.h

@@ -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);
 

src/x86/freq/freq_sse.c

@@ -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;
-}
-

src/x86/freq/freq_sse.h

@@ -1,6 +0,0 @@
-#ifndef __FREQ_SSE__
-#define __FREQ_SSE__
-
-void* compute_sse();
-
-#endif