123 lines
2.3 KiB
C
123 lines
2.3 KiB
C
#define _GNU_SOURCE /* See feature_test_macros(7) */
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h> /* For SYS_xxx definitions */
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sched.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <time.h>
|
|
#include "util.h"
|
|
|
|
#define TS2NS(sec, nsec) \
|
|
((unsigned long)(sec) * 1000000000ULL + \
|
|
(unsigned long)(nsec))
|
|
|
|
#define N_INIT 10000000
|
|
|
|
static inline void FIXED_SIZE_WORK(unsigned long *ptr)
|
|
{
|
|
asm volatile("mov %x0, x20\n"
|
|
"add x20, x20, #1\n"
|
|
"mov x20, %x0\n"
|
|
: "+rm" (*ptr)
|
|
:
|
|
: "x20", "cc", "memory");
|
|
}
|
|
|
|
static inline void BULK_FSW(unsigned long n,
|
|
unsigned long *ptr)
|
|
{
|
|
int j;
|
|
|
|
for (j = 0; j < (n); j++) {
|
|
FIXED_SIZE_WORK(ptr);
|
|
}
|
|
}
|
|
|
|
double nspw; /* nsec per work */
|
|
unsigned long nsec;
|
|
|
|
void fwq_init(unsigned long *mem)
|
|
{
|
|
struct timespec start, end;
|
|
unsigned long nsec;
|
|
|
|
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &start);
|
|
BULK_FSW(N_INIT, mem);
|
|
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &end);
|
|
nsec = (TS2NS(end.tv_sec, end.tv_nsec) -
|
|
TS2NS(start.tv_sec, start.tv_nsec));
|
|
nspw = nsec / (double)N_INIT;
|
|
printf("nsec=%ld, nspw=%f\n", nsec, nspw);
|
|
}
|
|
|
|
void fwq(long delay_nsec, unsigned long *mem)
|
|
{
|
|
BULK_FSW(delay_nsec / nspw, mem);
|
|
}
|
|
|
|
int print_cpu_last_executed_on(const char *name) {
|
|
char fn[256];
|
|
char* result;
|
|
pid_t tid = syscall(SYS_gettid);
|
|
int fd;
|
|
int offset;
|
|
int mpi_errno = 0;
|
|
|
|
sprintf(fn, "/proc/%d/task/%d/stat", getpid(), (int)tid);
|
|
//printf("fn=%s\n", fn);
|
|
fd = open(fn, O_RDONLY);
|
|
if(fd == -1) {
|
|
printf("open() failed\n");
|
|
goto fn_fail;
|
|
}
|
|
|
|
result = malloc(65536);
|
|
if(result == NULL) {
|
|
printf("malloc() failed");
|
|
goto fn_fail;
|
|
}
|
|
|
|
int amount = 0;
|
|
offset = 0;
|
|
while(1) {
|
|
amount = read(fd, result + offset, 65536);
|
|
// printf("amount=%d\n", amount);
|
|
if(amount == -1) {
|
|
printf("read() failed");
|
|
goto fn_fail;
|
|
}
|
|
if(amount == 0) {
|
|
goto eof;
|
|
}
|
|
offset += amount;
|
|
}
|
|
eof:;
|
|
//printf("result:%s\n", result);
|
|
|
|
char* next_delim = result;
|
|
char* field;
|
|
int i;
|
|
for(i = 0; i < 39; i++) {
|
|
field = strsep(&next_delim, " ");
|
|
}
|
|
|
|
int cpu = sched_getcpu();
|
|
if(cpu == -1) {
|
|
printf("getcpu() failed\n");
|
|
goto fn_fail;
|
|
}
|
|
|
|
printf("[INFO] %s (tid: %d) is running on %02d,%02d\n", name, tid, atoi(field), cpu);
|
|
fn_exit:
|
|
free(result);
|
|
return mpi_errno;
|
|
fn_fail:
|
|
mpi_errno = -1;
|
|
goto fn_exit;
|
|
}
|
|
|