Documentation/tools/rtla/common_timerlat_options.rst
-a, --auto us
Set the automatic trace mode. This mode sets some commonly used options
while debugging the system. It is equivalent to use **-T** *us* **-s** *us*
**-t**. By default, *timerlat* tracer uses FIFO:95 for *timerlat* threads,
thus equilavent to **-P** *f:95*.
-p, --period us
Set the *timerlat* tracer period in microseconds.
-i, --irq us
Stop trace if the *IRQ* latency is higher than the argument in us.
-T, --thread us
Stop trace if the *Thread* latency is higher than the argument in us.
-s, --stack us
Save the stack trace at the *IRQ* if a *Thread* latency is higher than the
argument in us.
--dma-latency us Set the /dev/cpu_dma_latency to us, aiming to bound exit from idle latencies. cyclictest sets this value to 0 by default, use --dma-latency 0 to have similar results.
-u, --user-threads
Set timerlat to run without a workload, and then dispatches user-space workloads
to wait on the timerlat_fd. Once the workload is awakes, it goes to sleep again
adding so the measurement for the kernel-to-user and user-to-kernel to the tracer
output.