diff options
Diffstat (limited to 'linux')
| -rw-r--r-- | linux/Config.tools.in | 18 | ||||
| -rw-r--r-- | linux/linux-tool-perf.mk | 87 |
2 files changed, 105 insertions, 0 deletions
diff --git a/linux/Config.tools.in b/linux/Config.tools.in index 008e68c5f4..24ef8cd743 100644 --- a/linux/Config.tools.in +++ b/linux/Config.tools.in @@ -8,4 +8,22 @@ config BR2_LINUX_KERNEL_TOOL_CPUPOWER cpupower is a collection of tools to examine and tune power saving related features of your processor. +config BR2_LINUX_KERNEL_TOOL_PERF + bool "perf" + help + perf (sometimes "Perf Events" or perf tools, originally + "Performance Counters for Linux") - is a performance + analyzing tool in Linux, available from kernel version + 2.6.31. User-space controlling utility, called 'perf' has + git-like interface with subcommands. It is capable of + statistical profiling of entire system (both kernel and user + code), single CPU or severals threads. + + This will build and install the userspace 'perf' + command. It is up to the user to ensure that the kernel + configuration has all the suitable options enabled to allow a + proper operation of 'perf'. + + https://perf.wiki.kernel.org/ + endmenu diff --git a/linux/linux-tool-perf.mk b/linux/linux-tool-perf.mk new file mode 100644 index 0000000000..0bd0ed1a13 --- /dev/null +++ b/linux/linux-tool-perf.mk @@ -0,0 +1,87 @@ +################################################################################ +# +# perf +# +################################################################################ + +LINUX_TOOLS += perf + +PERF_DEPENDENCIES = host-flex host-bison + +ifeq ($(KERNEL_ARCH),x86_64) +PERF_ARCH=x86 +else +PERF_ARCH=$(KERNEL_ARCH) +endif + +PERF_MAKE_FLAGS = \ + $(LINUX_MAKE_FLAGS) \ + ARCH=$(PERF_ARCH) \ + NO_LIBAUDIT=1 \ + NO_NEWT=1 \ + NO_GTK2=1 \ + NO_LIBPERL=1 \ + NO_LIBPYTHON=1 \ + DESTDIR=$(TARGET_DIR) \ + prefix=/usr \ + WERROR=0 \ + ASCIIDOC= + +# The call to backtrace() function fails for ARC, because for some +# reason the unwinder from libgcc returns early. Thus the usage of +# backtrace() should be disabled in perf explicitly: at build time +# backtrace() appears to be available, but it fails at runtime: the +# backtrace will contain only several functions from the top of stack, +# instead of the complete backtrace. +ifeq ($(BR2_arc),y) +PERF_MAKE_FLAGS += NO_BACKTRACE=1 +endif + +ifeq ($(BR2_PACKAGE_SLANG),y) +PERF_DEPENDENCIES += slang +endif + +ifeq ($(BR2_PACKAGE_LIBUNWIND),y) +PERF_DEPENDENCIES += libunwind +endif + +ifeq ($(BR2_PACKAGE_NUMACTL),y) +PERF_DEPENDENCIES += numactl +endif + +ifeq ($(BR2_PACKAGE_ELFUTILS),y) +PERF_DEPENDENCIES += elfutils +else +PERF_MAKE_FLAGS += NO_LIBELF=1 NO_DWARF=1 +endif + +# O must be redefined here to overwrite the one used by Buildroot for +# out of tree build. We build perf in $(@D)/tools/perf/ and not just +# $(@D) so that it isn't built in the root directory of the kernel +# sources. +define PERF_BUILD_CMDS + $(Q)if test ! -f $(@D)/tools/perf/Makefile ; then \ + echo "Your kernel version is too old and does not have the perf tool." ; \ + echo "At least kernel 2.6.31 must be used." ; \ + exit 1 ; \ + fi + $(Q)if test "$(BR2_PACKAGE_ELFUTILS)" = "" ; then \ + if ! grep -q NO_LIBELF $(@D)/tools/perf/Makefile* ; then \ + if ! test -r $(@D)/tools/perf/config/Makefile ; then \ + echo "The perf tool in your kernel cannot be built without libelf." ; \ + echo "Either upgrade your kernel to >= 3.7, or enable the elfutils package." ; \ + exit 1 ; \ + fi \ + fi \ + fi + $(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \ + -C $(@D)/tools/perf O=$(@D)/tools/perf/ +endef + +# After installation, we remove the Perl and Python scripts from the +# target. +define PERF_INSTALL_TARGET_CMDS + $(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \ + -C $(@D)/tools/perf O=$(@D)/tools/perf/ install + $(RM) -rf $(TARGET_DIR)/usr/libexec/perf-core/scripts/ +endef |
