perf cannot find external module symbols

问题

When running perf it finds the kernel symbols and symbols of my program but it does not find external module symbols. I have written a kernel module which I load using insmod how can I tell perf to find its symbols as well?

I am running a 2.6.37.6 kernel (can't upgrade), my perf does not yet support the dwarf option but I think its a symbol issue. I have compiled everything with -g -fno-omit-frame-pointer

回答1:

I had to make it a kernel module, then perf could find its symbols:

IN_TREE_DIR=/lib/modules/`uname -r`/kernel/modulename
mkdir -p $IN_TREE_DIR
cp modulename.ko $IN_TREE_DIR
depmod -a 

来源：https://stackoverflow.com/questions/22487625/perf-cannot-find-external-module-symbols