unsigned long measure_bw_and_set_irq(void)
{
long r_mbps, w_mbps, mbps;
ktime_t ts;
unsigned int us;
preempt_disable();
ts = ktime_get();
us = ktime_to_us(ktime_sub(ts, prev_ts));
if (!us)
us = 1;
mon_disable(RD_MON);
mon_disable(WR_MON);
r_mbps = mon_get_count(RD_MON, prev_r_start_val);
r_mbps = beats_to_mbps(r_mbps, us);
w_mbps = mon_get_count(WR_MON, prev_w_start_val);
w_mbps = beats_to_mbps(w_mbps, us);
prev_r_start_val = mon_set_limit_mbyte(RD_MON, to_limit(r_mbps));
prev_w_start_val = mon_set_limit_mbyte(WR_MON, to_limit(w_mbps));
prev_ts = ts;
mon_enable(RD_MON);
mon_enable(WR_MON);
preempt_enable();
mbps = r_mbps + w_mbps;
pr_debug("R/W/BW/us = %ld/%ld/%ld/%d\n", r_mbps, w_mbps, mbps, us);
return mbps;
}
static void measure_bw(void)
{
int r_mbps, w_mbps, mbps;
ktime_t ts;
unsigned int us;
mutex_lock(&bw_lock);
/*
* Since we are stopping the counters, we don't want this short work
* to be interrupted by other tasks and cause the measurements to be
* wrong. Not blocking interrupts to avoid affecting interrupt
* latency and since they should be short anyway because they run in
* atomic context.
*/
preempt_disable();
ts = ktime_get();
us = ktime_to_us(ktime_sub(ts, prev_ts));
if (!us)
us = 1;
mon_disable(0);
mon_disable(1);
r_mbps = mon_get_mbps(0, prev_r_start_val, us);
w_mbps = mon_get_mbps(1, prev_w_start_val, us);
prev_r_start_val = mon_set_limit_mbyte(0, to_limit(r_mbps));
prev_w_start_val = mon_set_limit_mbyte(1, to_limit(w_mbps));
mon_enable(0);
mon_enable(1);
preempt_enable();
mbps = r_mbps + w_mbps;
pr_debug("R/W/BW/us = %d/%d/%d/%d\n", r_mbps, w_mbps, mbps, us);
compute_bw(mbps);
prev_ts = ts;
mutex_unlock(&bw_lock);
}
unsigned long measure_bw_and_set_irq(void)
{
long r_mbps, w_mbps, mbps;
ktime_t ts;
unsigned int us;
/*
* Since we are stopping the counters, we don't want this short work
* to be interrupted by other tasks and cause the measurements to be
* wrong. Not blocking interrupts to avoid affecting interrupt
* latency and since they should be short anyway because they run in
* atomic context.
*/
preempt_disable();
ts = ktime_get();
us = ktime_to_us(ktime_sub(ts, prev_ts));
if (!us)
us = 1;
mon_disable(RD_MON);
mon_disable(WR_MON);
r_mbps = mon_get_count(RD_MON, prev_r_start_val);
r_mbps = beats_to_mbps(r_mbps, us);
w_mbps = mon_get_count(WR_MON, prev_w_start_val);
w_mbps = beats_to_mbps(w_mbps, us);
prev_r_start_val = mon_set_limit_mbyte(RD_MON, to_limit(r_mbps));
prev_w_start_val = mon_set_limit_mbyte(WR_MON, to_limit(w_mbps));
prev_ts = ts;
mon_enable(RD_MON);
mon_enable(WR_MON);
preempt_enable();
mbps = r_mbps + w_mbps;
pr_debug("R/W/BW/us = %ld/%ld/%ld/%d\n", r_mbps, w_mbps, mbps, us);
return mbps;
}
