Commit 8c977a17 authored by Kan Liang's avatar Kan Liang Committed by Peter Zijlstra
Browse files

alpha/perf: Remove driver-specific throttle support 



The throttle support has been added in the generic code. Remove
the driver-specific throttle support.

Besides the throttle, perf_event_overflow may return true because of
event_limit. It already does an inatomic event disable. The pmu->stop
is not required either.

Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-11-kan.liang@linux.intel.com
parent f1a6fe2a

arch/alpha/kernel/perf_event.c

+3 −8
Original line number Diff line number Diff line
@@ -852,14 +852,9 @@ static void alpha_perf_event_irq_handler(unsigned long la_ptr, 
	alpha_perf_event_update(event, hwc, idx, alpha_pmu->pmc_max_period[idx]+1);

	perf_sample_data_init(&data, 0, hwc->last_period);



	if (alpha_perf_event_set_period(event, hwc, idx)) {

		if (perf_event_overflow(event, &data, regs)) {

			/* Interrupts coming too quickly; "throttle" the

			 * counter, i.e., disable it for a little while.

			 */

			alpha_pmu_stop(event, 0);

		}

	}

	if (alpha_perf_event_set_period(event, hwc, idx))

		perf_event_overflow(event, &data, regs);



	wrperfmon(PERFMON_CMD_ENABLE, cpuc->idx_mask);



	return;