Peter Oberparleiter | 2521f2c | 2009-06-17 16:28:08 -0700 | [diff] [blame] | 1 | menu "GCOV-based kernel profiling" |
| 2 | |
| 3 | config GCOV_KERNEL |
| 4 | bool "Enable gcov-based kernel profiling" |
Josh Triplett | d2c3225 | 2011-06-15 15:08:47 -0700 | [diff] [blame] | 5 | depends on DEBUG_FS |
Vitaliy Ivanov | 947be5d | 2011-07-26 16:08:49 -0700 | [diff] [blame] | 6 | select CONSTRUCTORS if !UML |
Peter Oberparleiter | 2521f2c | 2009-06-17 16:28:08 -0700 | [diff] [blame] | 7 | default n |
| 8 | ---help--- |
| 9 | This option enables gcov-based code profiling (e.g. for code coverage |
| 10 | measurements). |
| 11 | |
| 12 | If unsure, say N. |
| 13 | |
| 14 | Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data |
| 15 | for the entire kernel. To enable profiling for specific files or |
| 16 | directories, add a line similar to the following to the respective |
| 17 | Makefile: |
| 18 | |
| 19 | For a single file (e.g. main.o): |
| 20 | GCOV_PROFILE_main.o := y |
| 21 | |
| 22 | For all files in one directory: |
| 23 | GCOV_PROFILE := y |
| 24 | |
| 25 | To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL |
| 26 | is specified, use: |
| 27 | |
| 28 | GCOV_PROFILE_main.o := n |
| 29 | and: |
| 30 | GCOV_PROFILE := n |
| 31 | |
| 32 | Note that the debugfs filesystem has to be mounted to access |
| 33 | profiling data. |
| 34 | |
| 35 | config GCOV_PROFILE_ALL |
| 36 | bool "Profile entire Kernel" |
| 37 | depends on GCOV_KERNEL |
Chris Smith | d4f7e51 | 2010-11-12 16:26:54 +0100 | [diff] [blame] | 38 | depends on SUPERH || S390 || X86 || (PPC && EXPERIMENTAL) || MICROBLAZE |
Peter Oberparleiter | 2521f2c | 2009-06-17 16:28:08 -0700 | [diff] [blame] | 39 | default n |
| 40 | ---help--- |
| 41 | This options activates profiling for the entire kernel. |
| 42 | |
| 43 | If unsure, say N. |
| 44 | |
| 45 | Note that a kernel compiled with profiling flags will be significantly |
| 46 | larger and run slower. Also be sure to exclude files from profiling |
| 47 | which are not linked to the kernel image to prevent linker errors. |
| 48 | |
| 49 | endmenu |