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Commit 5f238f43 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "usb: dwc3: gadget: Keep track of IRQ timing statistics"

parents da67ca60 117192b5

drivers/usb/dwc3/core.h

+4 −0
Original line number Diff line number Diff line
@@ -911,6 +911,10 @@ struct dwc3 { 
	unsigned                bh_completion_time[MAX_INTR_STATS];

	unsigned                bh_handled_evt_cnt[MAX_INTR_STATS];

	unsigned                bh_dbg_index;

	ktime_t			irq_start_time[MAX_INTR_STATS];

	unsigned                irq_completion_time[MAX_INTR_STATS];

	unsigned                irq_event_count[MAX_INTR_STATS];

	unsigned                irq_dbg_index;

};



/* -------------------------------------------------------------------------- */

drivers/usb/dwc3/debugfs.c

+10 −1
Original line number Diff line number Diff line
@@ -1175,7 +1175,16 @@ static int dwc3_gadget_int_events_show(struct seq_file *s, void *unused) 
	seq_printf(s, "unknown_event:%u\n", dbg_gadget_events->unknown_event);



	seq_printf(s, "\n\t== Last %d interrupts stats ==\t\n", MAX_INTR_STATS);

	seq_puts(s, "events count:\t");

	seq_puts(s, "@ time (us):\t");

	for (i = 0; i < MAX_INTR_STATS; i++)

		seq_printf(s, "%lld\t", ktime_to_us(dwc->irq_start_time[i]));

	seq_puts(s, "\nhard irq time (us):\t");

	for (i = 0; i < MAX_INTR_STATS; i++)

		seq_printf(s, "%d\t", dwc->irq_completion_time[i]);

	seq_puts(s, "\nevents count:\t");

	for (i = 0; i < MAX_INTR_STATS; i++)

		seq_printf(s, "%d\t", dwc->irq_event_count[i]);

	seq_puts(s, "\nbh handled count:\t");

	for (i = 0; i < MAX_INTR_STATS; i++)

		seq_printf(s, "%d\t", dwc->bh_handled_evt_cnt[i]);

	seq_puts(s, "\ntasklet time:\t");

drivers/usb/dwc3/gadget.c

+11 −0
Original line number Diff line number Diff line
@@ -3476,7 +3476,10 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc) 
	struct dwc3			*dwc = _dwc;

	int				i;

	irqreturn_t			ret = IRQ_NONE;

	unsigned			temp_cnt = 0;

	ktime_t				start_time;



	start_time = ktime_get();

	spin_lock(&dwc->lock);



	if (dwc->err_evt_seen) {
@@ -3491,10 +3494,18 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc) 
		status = dwc3_process_event_buf(dwc, i);

		if (status == IRQ_WAKE_THREAD)

			ret = status;



		temp_cnt += dwc->ev_buffs[i]->count;

	}



	spin_unlock(&dwc->lock);



	dwc->irq_start_time[dwc->irq_dbg_index] = start_time;

	dwc->irq_completion_time[dwc->irq_dbg_index] =

		ktime_us_delta(ktime_get(), start_time);

	dwc->irq_event_count[dwc->irq_dbg_index] = temp_cnt / 4;

	dwc->irq_dbg_index = (dwc->irq_dbg_index + 1) % MAX_INTR_STATS;



	if (ret == IRQ_WAKE_THREAD) {

		disable_irq_nosync(irq);

		tasklet_schedule(&dwc->bh);