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Diffstat (limited to 'kernel/gcov/Kconfig')
-rw-r--r-- | kernel/gcov/Kconfig | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig new file mode 100644 index 000000000000..70a298d6da71 --- /dev/null +++ b/kernel/gcov/Kconfig | |||
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1 | menu "GCOV-based kernel profiling" | ||
2 | |||
3 | config 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 | |||
34 | config 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 | |||
48 | endmenu | ||