void hook_start_roi_() {
// trash the cache
const int kAllocSize = 48 * 1024 * 2014;
long *tmp = malloc(kAllocSize);
int i;
for (i = 0; i < kAllocSize / sizeof(long); i++) tmp[i] = 0;
free(tmp);
struct timeval t;
gettimeofday(&t,NULL);
time_begin = (double)t.tv_sec+(double)t.tv_usec*1e-6;
//if (perf_event_fds == NULL) warnx("perfctr FDs not initialized");
//else perfctr_start(perf_event_fds, g_num_events);
// perfctr_start(perf_event_fds2, g_num_events);
oprofile_start();
}
static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
if (val)
retval = oprofile_start();
else
oprofile_stop();
if (retval)
return retval;
return count;
}