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CONFIG_PREEMPTIRQ_DELAY_TEST: Test module to create a preempt / IRQ disable delay thread to test latency tracers

General informations

The Linux kernel configuration item CONFIG_PREEMPTIRQ_DELAY_TEST has multiple definitions:

Test module to create a preempt / IRQ disable delay thread to test latency tracers found in kernel/trace/Kconfig

The configuration item CONFIG_PREEMPTIRQ_DELAY_TEST:

Help text

Select this option to build a test module that can help test latency tracers by executing a preempt or irq disable section with a user configurable delay. The module busy waits for the duration of the critical section.

For example, the following invocation generates a burst of three irq-disabled critical sections for 500us: modprobe preemptirq_delay_test test_mode=irq delay=500 burst_size=3

If unsure, say N

Preempt / IRQ disable delay thread to test latency tracers found in kernel/trace/Kconfig

The configuration item CONFIG_PREEMPTIRQ_DELAY_TEST:

Help text

Select this option to build a test module that can help test latency tracers by executing a preempt or irq disable section with a user configurable delay. The module busy waits for the duration of the critical section.

For example, the following invocation generates a burst of three irq-disabled critical sections for 500us: modprobe preemptirq_delay_test test_mode=irq delay=500 burst_size=3

If unsure, say N

Hardware

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