c – avx _mm256_load_pd(): Process terminating with default action of signal 11 (SIGSEGV): dumping core General Protection Fault

Exception or error: I get General Protection Fault runtime error all the time when tring to do some matrix multiplication. Here is the mininal C code after hunting down. #include <stdio.h> #include <stdlib.h> #include <x86intrin.h> void f(){ double *H=calloc(4096,sizeof(double)); __m256d c0 = _mm256_load_pd(H); free(H); } int main(int argc,char *argv[]){ fopen(“somefile”,”wb”); for(int x=0;x<1;++x){ f(); } return …

c – Forking a proccess into 7 childs without looping

Exception or error: How can i create 7 processes using 1 parent in just 3 forks() call looping is not allowed out of 7 1 is the parent one How to solve: I tried #include <stdio.h> #include <unistd.h> #include <sys/wait.h> int main(void) { printf(“master process is %d.\n”, getpid()); fork(); fork(); fork(); wait(0); printf(“my pid is …