void *
rw4k_thread(void *p)
{
struct RR *rr = (typeof(rr))p;
uint8_t * const buf = alloc_buf(rr);
uint64_t cap = 0;
ioctl(rr->fd, BLKGETSIZE64, &cap);
if (cap == 0) {
cap = lseek(rr->fd, 0, SEEK_END);
}
assert(cap);
cap = (rr->perc * (double)cap);
setup_affinity(rr);
const uint64_t start = debug_time_usec();
const uint64_t dur = rr->duration_sec * 1000000;
uint64_t count = 0;
const uint64_t round = 10;
for (;;) {
for (uint64_t i = 0; i < round; i++) {
do_random_rw(rr->fd, rr->mask, buf, rr->write, cap);
}
count += round;
if (debug_time_usec() - start > dur) break;
}
// record
rr->nr_io = count;
free(buf);
pthread_exit(NULL);
}
/*
* Called when affinity is set via /proc/irq
*/
int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
int ret;
raw_spin_lock_irqsave(&desc->lock, flags);
ret = setup_affinity(irq, desc, mask);
raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
/*
* Called when affinity is set via /proc/irq
*/
int irq_select_affinity_usr(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
int ret;
raw_spin_lock_irqsave(&desc->lock, flags);
ret = setup_affinity(irq, desc);
if (!ret)
irq_set_thread_affinity(desc);
raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}