Linux kernel module that disables the CPU cache - taken from http://www.linuxquestions.org/questions/linux-kernel-70/disabling-cpu-caches-936077/
#Other suggestions on linuxquestions
static inline void cache_off(void)
{
asm(
"push %eax\n\t"
"movl %cr0,%eax\n\t"
"orl $0x40000000,%eax\n\t" /* Set CD */
"movl %eax,%cr0\n\t"
"wbinvd\n\t"
"pop %eax\n\t");
}int main(int argc, char **argv) {
int i, j;
char memory[1024];
for (i = 0; i < 1000; ++i) {
for (j = 0; j < 1023; ++j) {
memory[j] = memory[j+1]+1;
}
}
return 0;
}perf stat -e L1-dcache-load-misses ./cachetest