LXR linux/kernel/gcov/Kconfig

   1menu "GCOV-based kernel profiling"
   2
   3config GCOV_KERNEL
   4        bool "Enable gcov-based kernel profiling"
   5        depends on DEBUG_FS && CONSTRUCTORS
   6        default n
   7        ---help---
   8        This option enables gcov-based code profiling (e.g. for code coverage
   9        measurements).
  10
  11        If unsure, say N.
  12
  13        Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data
  14        for the entire kernel. To enable profiling for specific files or
  15        directories, add a line similar to the following to the respective
  16        Makefile:
  17
  18        For a single file (e.g. main.o):
  19                GCOV_PROFILE_main.o := y
  20
  21        For all files in one directory:
  22                GCOV_PROFILE := y
  23
  24        To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL
  25        is specified, use:
  26
  27                GCOV_PROFILE_main.o := n
  28        and:
  29                GCOV_PROFILE := n
  30
  31        Note that the debugfs filesystem has to be mounted to access
  32        profiling data.
  33
  34config GCOV_PROFILE_ALL
  35        bool "Profile entire Kernel"
  36        depends on GCOV_KERNEL
  37        depends on S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE
  38        default n
  39        ---help---
  40        This options activates profiling for the entire kernel.
  41
  42        If unsure, say N.
  43
  44        Note that a kernel compiled with profiling flags will be significantly
  45        larger and run slower. Also be sure to exclude files from profiling
  46        which are not linked to the kernel image to prevent linker errors.
  47
  48endmenu
  49