From bb4c5500c9c5b809696eee212843e731721a6e15 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 14 Nov 2013 08:33:24 +0100 Subject: [PATCH] tools/perf/build: Fix timerfd feature check 'feature_timerfd' is checked all the time and calculated explicitly, in a serial fashion. Add it to CORE_FEATURE_TESTS which causes it to be built in parallel, using the newfangled parallel build autodetection code. This shaves 137 msecs off the perf build time on my system, which speeds up the common case cached build by 43%: Before: comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/ [...] 0,453771441 seconds time elapsed ( +- 0,09% ) After: comet:~/tip> perf stat --null --repeat 5 make -C tools/perf/ [...] 0,316290185 seconds time elapsed ( +- 0,24% ) Cc: David Ahern Cc: Arnaldo Carvalho de Melo Cc: Linus Torvalds Link: http://lkml.kernel.org/n/tip-bb92CmexihopoSyqnkqepvsy@git.kernel.org Signed-off-by: Ingo Molnar --- tools/perf/config/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index f5905f2b197d..861379ec7632 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -142,7 +142,8 @@ CORE_FEATURE_TESTS = \ libunwind \ on-exit \ stackprotector \ - stackprotector-all + stackprotector-all \ + timerfd # # So here we detect whether test-all was rebuilt, to be able @@ -405,7 +406,6 @@ else endif endif -$(call feature_check,timerfd) ifeq ($(feature-timerfd), 1) CFLAGS += -DHAVE_TIMERFD_SUPPORT else -- 2.20.1