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tools/perf/build: Speed up auto-detection

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The detection of certain rarely detected features can be delayed
to when they are actually needed.

So speed up the common case of auto-detection by pre-building only
a core set of features and populating only their feature-flags.

[ Features not listed in CORE_FEATURES need to built explicitly
  via the feature_check() function. ]

(Also order the feature names alphabetically, while at it.)

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-xQkuveknd0gqla1dfxrqKpkl@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2013-10-02 09:54:43 +02:00
parent de0f03fb8d
commit f1138ec66e
2 changed files with 46 additions and 36 deletions
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51
tools/perf/config/Makefile
View File

@ -105,30 +105,36 @@ endef
$(info )
$(info Auto-detecting system features:)
FEATURE_TESTS = \
hello \
stackprotector-all \
stackprotector \
volatile-register-var \
fortify-source \
bionic \
libelf \
glibc \
#
# Note that this is not a complete list of all feature tests, just
# those that are typically built on a fully configured system.
#
# [ Feature tests not mentioned here have to be built explicitly in
# the rule that uses them - an example for that is the 'bionic'
# feature check. ]
#
CORE_FEATURE_TESTS = \
backtrace \
dwarf \
libelf-mmap \
libelf-getphdrnum \
libunwind \
libaudit \
libslang \
fortify-source \
glibc \
gtk2 \
gtk2-infobar \
libaudit \
libbfd \
libelf \
libelf-getphdrnum \
libelf-mmap \
libnuma \
libperl \
libpython \
libpython-version \
libbfd \
libslang \
libunwind \
on-exit \
backtrace \
libnuma
stackprotector \
stackprotector-all \
volatile-register-var
#
# Special fast-path for the 'all features are available' case:
@ -136,10 +142,13 @@ FEATURE_TESTS = \
$(call feature_check,all)
ifeq ($(feature-all), 1)
$(foreach feat,$(FEATURE_TESTS),$(call feature_set,$(feat)))
#
# test-all.c passed - just set all the core feature flags to 1:
#
$(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_set,$(feat)))
else
$(shell $(MAKE) -i -j -C config/feature-checks >/dev/null 2>&1)
$(foreach feat,$(FEATURE_TESTS),$(call feature_check,$(feat)))
$(shell $(MAKE) -i -j -C config/feature-checks $(CORE_FEATURE_TESTS) >/dev/null 2>&1)
$(foreach feat,$(CORE_FEATURE_TESTS),$(call feature_check,$(feat)))
endif
feature_print = $(eval $(feature_print_code))
@ -156,7 +165,7 @@ define feature_print_code
$(info $(MSG))
endef
$(foreach feat,$(FEATURE_TESTS) DUMMY,$(call feature_print,$(feat)))
$(foreach feat,$(CORE_FEATURE_TESTS) DUMMY,$(call feature_print,$(feat)))
# newline at the end of the feature printouts:
$(info )

31
tools/perf/config/feature-checks/Makefile
View File

@ -1,28 +1,29 @@
FILES= \
test-hello \
test-stackprotector-all \
test-stackprotector \
test-volatile-register-var \
test-fortify-source \
test-all \
test-backtrace \
test-bionic \
test-libelf \
test-glibc \
test-dwarf \
test-libelf-mmap \
test-libelf-getphdrnum \
test-libunwind \
test-libaudit \
test-libslang \
test-fortify-source \
test-glibc \
test-gtk2 \
test-gtk2-infobar \
test-hello \
test-libaudit \
test-libbfd \
test-libelf \
test-libelf-getphdrnum \
test-libelf-mmap \
test-libnuma \
test-libperl \
test-libpython \
test-libpython-version \
test-libbfd \
test-libslang \
test-libunwind \
test-on-exit \
test-backtrace \
test-libnuma
test-stackprotector-all \
test-stackprotector \
test-volatile-register-var
CC := $(CC) -MD