thelilfrog/cpufetch
1
0
Fork 0
mirror of https://github.com/Dr-Noob/cpufetch.git synced 2026-03-26 00:10:38 +01:00
Code Issues Packages Projects Releases Wiki Activity

[v1.05] Experimental max frequency measurement (x86 only)

Browse Source
This commit is contained in:
Dr-Noob
2024-02-14 08:48:27 +00:00
parent cc16bc56ef
commit 72eee0e08e
6 changed files with 190 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/x86/cpuid.c
View File

@@ -6,6 +6,10 @@
#include <unistd.h>
#endif
#ifdef __linux__
#include "../common/freq.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -960,6 +964,13 @@ struct frequency* get_frequency_info(struct cpuInfo* cpu) {
}
}
#ifdef __linux__
if (freq->max == UNKNOWN_DATA) {
printWarn("All previous methods failed, measuring CPU frequency");
freq->max = measure_max_frequency();
}
#endif
return freq;
}

46
src/x86/freq/freq.c
View File

@@ -144,3 +144,49 @@ int64_t measure_frequency(struct cpuInfo* cpu) {
printf("\r%*c", num_spaces, ' ');
return freq_struct->freq;
}
#define INSERT_ASM_ONCE __asm volatile("nop");
#define INSERT_ASM_10_TIMES \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
INSERT_ASM_ONCE \
#define INSERT_ASM_100_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES \
INSERT_ASM_10_TIMES
#define INSERT_ASM_1000_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
INSERT_ASM_100_TIMES \
void nop_function_x86(uint64_t iters) {
for (uint64_t i = 0; i < iters; i++) {
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
INSERT_ASM_1000_TIMES
}
}

1
src/x86/freq/freq.h
View File

@@ -9,5 +9,6 @@
#define LOOP_ITERS 100000000
int64_t measure_frequency(struct cpuInfo* cpu);
void nop_function_x86(uint64_t iters);
#endif