diff options
Diffstat (limited to 'Documentation/tools/rtla/common_timerlat_options.rst')
| -rw-r--r-- | Documentation/tools/rtla/common_timerlat_options.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst index e9c1bfd55d48..bacdea6de7a3 100644 --- a/Documentation/tools/rtla/common_timerlat_options.rst +++ b/Documentation/tools/rtla/common_timerlat_options.rst @@ -1,3 +1,10 @@ +**-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. @@ -14,3 +21,8 @@ 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. |