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Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index dcc0166d1997..e15fadbe5dfb 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -687,6 +687,21 @@ config RING_BUFFER_STARTUP_TEST If unsure, say N +config PREEMPTIRQ_DELAY_TEST + tristate "Preempt / IRQ disable delay thread to test latency tracers" + depends on m + help + 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 forces a one-time irq-disabled + critical section for 500us: + modprobe preemptirq_delay_test test_mode=irq delay=500000 + + If unsure, say N + config TRACE_EVAL_MAP_FILE bool "Show eval mappings for trace events" depends on TRACING |