We want to implement ftrace function in L3.14.28 Linux BSP.
(bb file is based on the fsl-image-gui.bb)
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
May we have any advice?
I was able to get it to work by using menuconfig to enable ftrace. Just modifying the local.conf file did not work as specified in the yocto directions and I am not sure that step is necessary.
what I did to fix the problem
I have the same problem. I made the changes as described in the wiki
I did a clean and rebuild of the image.
$> bitbake -c clean fsl-image-validation-imx
$> bitbake fsl-image-validation-imx
Then loaded the .sdcard image onto the target. There is no tracing directory as described in the wiki page at /sys/kernel/debug/.
On the target the debugfs, where the tracing sub-directories should be, is mounted,
> debugfs on /sys/kernel/debug type debugfs (rw,relatime).
is there a different image that should be built or a different way to build it?