Commit d2c19a05 authored Dec 24, 2024 by Dmitrii Golovanov Committed by Fabio Baltieri Jan 06, 2025

arch: nios2: timing: Fix timing cycles rollover



Fix arch_timing_cycles_get() to prevent overflow on the clock rollover.

The issue is observable on tests/benchmarks/wait_queues and
tests/benchmarks/sched_queues with BENCHMARK_NUM_ITERATIONS is large
enough, e.g. default 1000.

Signed-off-by: Dmitrii Golovanov <dmitrii.golovanov@intel.com>

parent 9fcb1740

arch/nios2/core/timing.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -41,7 +41,13 @@ timing_t arch_timing_counter_get(void)
		uint64_t arch_timing_cycles_get(volatile timing_t *const start,
		volatile timing_t *const end)
		{
		return (end - start);
		timing_t start_ = *start;
		timing_t end_ = *end;

		if (end_ >= start_) {
		return (end_ - start_);
		}
		return (end_ + NIOS2_SUBTRACT_CLOCK_CYCLES(start_));
		}

		uint64_t arch_timing_freq_get(void)

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