| **-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. |
