linux-kernel - Re: [PATCH update] perf build: Use feature dump file for build-test

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Date:	Fri, 29 Jan 2016 21:02:19 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	<jolsa@...hat.com>, <acme@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...nel.org>,
	"Arnaldo Carvalho de Melo" <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH update] perf build: Use feature dump file for build-test

I tested this patch in my platform with

  $ make build-test
  $ make -f ./tests/make

All test cases passed for me.

Thank you.

On 2016/1/29 19:51, Wang Nan wrote:
> To prevent feature check run too many times, this patch utilizes
> previous introduced feature-dump make target and FEATURES_DUMP
> variable, makes sure the feature checkers run only once when doing
> build-test for normal test cases.
>
> However, since standard users doesn't reuse features dump result, we'd
> better give an option to check their behaviors. The above feature
> should be used to make build-test faster only. Only utilize it for
> build-test.
>
> Signed-off-by: Wang Nan <wangnan0@...wei.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> ---
>   tools/perf/Makefile   |  2 +-
>   tools/perf/tests/make | 33 +++++++++++++++++++++++++++++++++
>   2 files changed, 34 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> index dcd9a70..e4ff0bd 100644
> --- a/tools/perf/Makefile
> +++ b/tools/perf/Makefile
> @@ -78,7 +78,7 @@ clean:
>   # The build-test target is not really parallel, don't print the jobs info:
>   #
>   build-test:
> -	@$(MAKE) SHUF=1 -f tests/make --no-print-directory
> +	@$(MAKE) SHUF=1 -f tests/make REUSE_FEATURES_DUMP=1 --no-print-directory
>   
>   #
>   # All other targets get passed through:
> diff --git a/tools/perf/tests/make b/tools/perf/tests/make
> index f918015..7f663f4 100644
> --- a/tools/perf/tests/make
> +++ b/tools/perf/tests/make
> @@ -15,6 +15,7 @@ else
>   PERF := .
>   PERF_O := $(PERF)
>   O_OPT :=
> +FULL_O := $(shell readlink -f $(PERF_O) || echo $(PERF_O))
>   
>   ifneq ($(O),)
>     FULL_O := $(shell readlink -f $(O) || echo $(O))
> @@ -313,11 +314,43 @@ make_kernelsrc_tools:
>   	(make -C ../../tools $(PARALLEL_OPT) $(K_O_OPT) perf) > $@ 2>&1 && \
>   	test -x $(KERNEL_O)/tools/perf/perf && rm -f $@ || (cat $@ ; false)
>   
> +FEATURES_DUMP_FILE := $(FULL_O)/BUILD_TEST_FEATURE_DUMP
> +FEATURES_DUMP_FILE_STATIC := $(FULL_O)/BUILD_TEST_FEATURE_DUMP_STATIC
> +
>   all: $(run) $(run_O) tarpkg make_kernelsrc make_kernelsrc_tools
>   	@echo OK
> +	@rm -f $(FEATURES_DUMP_FILE) $(FEATURES_DUMP_FILE_STATIC)
>   
>   out: $(run_O)
>   	@echo OK
> +	@rm -f $(FEATURES_DUMP_FILE) $(FEATURES_DUMP_FILE_STATIC)
> +
> +ifeq ($(REUSE_FEATURES_DUMP),1)
> +$(FEATURES_DUMP_FILE):
> +	$(call clean)
> +	@cmd="cd $(PERF) && make FEATURE_DUMP_COPY=$@ $(O_OPT) feature-dump"; \
> +	echo "- $@: $$cmd" && echo $$cmd && \
> +	( eval $$cmd ) > /dev/null 2>&1
> +
> +$(FEATURES_DUMP_FILE_STATIC):
> +	$(call clean)
> +	@cmd="cd $(PERF) && make FEATURE_DUMP_COPY=$@ $(O_OPT) LDFLAGS='-static' feature-dump"; \
> +	echo "- $@: $$cmd" && echo $$cmd && \
> +	( eval $$cmd ) > /dev/null 2>&1
> +
> +# Add feature dump dependency for run/run_O targets
> +$(foreach t,$(run) $(run_O),$(eval \
> +	$(t): $(if $(findstring make_static,$(t)),\
> +		$(FEATURES_DUMP_FILE_STATIC),\
> +		$(FEATURES_DUMP_FILE))))
> +
> +# Append 'FEATURES_DUMP=' option to all test cases. For example:
> +# make_no_libbpf: NO_LIBBPF=1  --> NO_LIBBPF=1 FEATURES_DUMP=/a/b/BUILD_TEST_FEATURE_DUMP
> +# make_static: LDFLAGS=-static --> LDFLAGS=-static FEATURES_DUMP=/a/b/BUILD_TEST_FEATURE_DUMP_STATIC
> +$(foreach t,$(run),$(if $(findstring make_static,$(t)),\
> +			$(eval $(t) := $($(t)) FEATURES_DUMP=$(FEATURES_DUMP_FILE_STATIC)),\
> +			$(eval $(t) := $($(t)) FEATURES_DUMP=$(FEATURES_DUMP_FILE))))
> +endif
>   
>   .PHONY: all $(run) $(run_O) tarpkg clean make_kernelsrc make_kernelsrc_tools
>   endif # ifndef MK