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improve gem5 memory model and cpufreq experiments

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Ciro Santilli 六四事件 法轮功
2020-06-10 01:00:00 +00:00
parent eb22fd3b6e
commit 6a5b9673c7
4 changed files with 325 additions and 106 deletions
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24
userland/linux/sysconf.c
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@@ -5,11 +5,31 @@
#include <stdlib.h>
#include <unistd.h>
#define SYSCONF(x) printf("_SC_%-23s = %ld\n", #x, sysconf(_SC_ ## x))
int main(void) {
/* Number of processors, not considering affinity:
* http://stackoverflow.com/questions/2693948/how-do-i-retrieve-the-number-of-processors-on-c-linux */
printf("_SC_NPROCESSORS_ONLN = %ld\n", sysconf(_SC_NPROCESSORS_ONLN));
SYSCONF(NPROCESSORS_ONLN);
/* CPUs configured by OS during boot. Some may have gone offline, so could be larger than _SC_NPROCESSORS_ONLN.a */
printf("_SC_NPROCESSORS_CONF = %ld\n", sysconf(_SC_NPROCESSORS_CONF));
SYSCONF(NPROCESSORS_CONF);
/* https://cirosantilli.com/linux-kernel-module-cheat#gem5-cache-size */
SYSCONF(LEVEL1_ICACHE_SIZE);
SYSCONF(LEVEL1_ICACHE_ASSOC);
SYSCONF(LEVEL1_ICACHE_LINESIZE);
SYSCONF(LEVEL1_DCACHE_SIZE);
SYSCONF(LEVEL1_DCACHE_ASSOC);
SYSCONF(LEVEL1_DCACHE_LINESIZE);
SYSCONF(LEVEL2_CACHE_SIZE);
SYSCONF(LEVEL2_CACHE_ASSOC);
SYSCONF(LEVEL2_CACHE_LINESIZE);
SYSCONF(LEVEL3_CACHE_SIZE);
SYSCONF(LEVEL3_CACHE_ASSOC);
SYSCONF(LEVEL3_CACHE_LINESIZE);
SYSCONF(LEVEL4_CACHE_SIZE);
SYSCONF(LEVEL4_CACHE_ASSOC);
SYSCONF(LEVEL4_CACHE_LINESIZE);
return EXIT_SUCCESS;
}