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How to enable a ftrace function on L3.14.28 BSP for i.MX6DL

Question asked by yuuki on Aug 19, 2018
Latest reply on Jun 25, 2019 by eric mascio

Dear all,


We want to implement ftrace function in L3.14.28 Linux BSP.
(bb file is based on the
However I cannot enable the ftrace function.

Would you tell me how to enable the ftrace function?


We refer to the following URL.



We added the following line to conf/local.conf.
  $ EXTRA_IMAGE_FEATURES = "debug-tweaks tools-profile"
  $ PACKAGE_DEBUG_SPLIT_STYLE = 'debug-file-directory'


And then bitbak is executed.
However, tracing folder is not made under /sys/kernel/debug/.


We suspect that a procedure is not enough.
If there is the package which should be added to IMAGE_INSTALL_append more, would you tell us it?


On the other hand, we exclude the following item from IMAGE_INSTALL_append
 - packagegroup-fsl-tools-testapps
 - packagegroup-fsl-tools-benchmark

May we have any advice?

Best Regards,