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83 lines
2.1 KiB
83 lines
2.1 KiB
menu "GCOV-based kernel profiling" |
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config GCOV_KERNEL |
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bool "Enable gcov-based kernel profiling" |
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depends on DEBUG_FS |
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select CONSTRUCTORS if !UML |
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default n |
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---help--- |
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This option enables gcov-based code profiling (e.g. for code coverage |
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measurements). |
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If unsure, say N. |
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Additionally specify CONFIG_GCOV_PROFILE_ALL=y to get profiling data |
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for the entire kernel. To enable profiling for specific files or |
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directories, add a line similar to the following to the respective |
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Makefile: |
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For a single file (e.g. main.o): |
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GCOV_PROFILE_main.o := y |
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For all files in one directory: |
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GCOV_PROFILE := y |
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To exclude files from being profiled even when CONFIG_GCOV_PROFILE_ALL |
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is specified, use: |
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GCOV_PROFILE_main.o := n |
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and: |
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GCOV_PROFILE := n |
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Note that the debugfs filesystem has to be mounted to access |
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profiling data. |
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config ARCH_HAS_GCOV_PROFILE_ALL |
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def_bool n |
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config GCOV_PROFILE_ALL |
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bool "Profile entire Kernel" |
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depends on !COMPILE_TEST |
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depends on GCOV_KERNEL |
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depends on ARCH_HAS_GCOV_PROFILE_ALL |
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default n |
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---help--- |
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This options activates profiling for the entire kernel. |
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If unsure, say N. |
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Note that a kernel compiled with profiling flags will be significantly |
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larger and run slower. Also be sure to exclude files from profiling |
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which are not linked to the kernel image to prevent linker errors. |
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choice |
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prompt "Specify GCOV format" |
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depends on GCOV_KERNEL |
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default GCOV_FORMAT_AUTODETECT |
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---help--- |
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The gcov format is usually determined by the GCC version, but there are |
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exceptions where format changes are integrated in lower-version GCCs. |
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In such a case use this option to adjust the format used in the kernel |
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accordingly. |
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If unsure, choose "Autodetect". |
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config GCOV_FORMAT_AUTODETECT |
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bool "Autodetect" |
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---help--- |
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Select this option to use the format that corresponds to your GCC |
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version. |
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config GCOV_FORMAT_3_4 |
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bool "GCC 3.4 format" |
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---help--- |
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Select this option to use the format defined by GCC 3.4. |
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config GCOV_FORMAT_4_7 |
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bool "GCC 4.7 format" |
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---help--- |
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Select this option to use the format defined by GCC 4.7. |
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endchoice |
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endmenu
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