How to use ARM ETM/ETB at linux?

[Frank Li]

Anyone use ARM ETM/ETB before?

I run.
echo 1 > /sys/devices/etm/trace_running

root at freescale /$ echo v >/proc/sysrq-trigger
SysRq : etm
Trace buffer contents length: 4
--- ETB buffer begin ---
01000000000000000000000000000000

--- ETB buffer end ---


best regards
Frank Li