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-rw-r--r--INSTALL14
-rw-r--r--Makefile21
2 files changed, 29 insertions, 6 deletions
diff --git a/INSTALL b/INSTALL
index ba01e7421..6ec7a24e1 100644
--- a/INSTALL
+++ b/INSTALL
@@ -28,7 +28,7 @@ set up install paths (via config.mak.autogen), so you can write instead
If you're willing to trade off (much) longer build time for a later
faster git you can also do a profile feedback build with
- $ make prefix=/usr PROFILE=BUILD all
+ $ make prefix=/usr profile
# make prefix=/usr PROFILE=BUILD install
This will run the complete test suite as training workload and then
@@ -36,10 +36,20 @@ rebuild git with the generated profile feedback. This results in a git
which is a few percent faster on CPU intensive workloads. This
may be a good tradeoff for distribution packagers.
+Alternatively you can run profile feedback only with the git benchmark
+suite. This runs significantly faster than the full test suite, but
+has less coverage:
+
+ $ make prefix=/usr profile-fast
+ # make prefix=/usr PROFILE=BUILD install
+
Or if you just want to install a profile-optimized version of git into
your home directory, you could run:
- $ make PROFILE=BUILD install
+ $ make profile-install
+
+or
+ $ make profile-fast-install
As a caveat: a profile-optimized build takes a *lot* longer since the
git tree must be built twice, and in order for the profiling
diff --git a/Makefile b/Makefile
index ba64be9fb..a76040237 100644
--- a/Makefile
+++ b/Makefile
@@ -1643,13 +1643,20 @@ SHELL = $(SHELL_PATH)
all:: shell_compatibility_test
ifeq "$(PROFILE)" "BUILD"
-ifeq ($(filter all,$(MAKECMDGOALS)),all)
-all:: profile-clean
+all:: profile
+endif
+
+profile:: profile-clean
$(MAKE) PROFILE=GEN all
$(MAKE) PROFILE=GEN -j1 test
$(MAKE) PROFILE=GEN -j1 perf
-endif
-endif
+ $(MAKE) PROFILE=USE all
+
+profile-fast: profile-clean
+ $(MAKE) PROFILE=GEN all
+ $(MAKE) PROFILE=GEN -j1 perf
+ $(MAKE) PROFILE=USE all
+
all:: $(ALL_PROGRAMS) $(SCRIPT_LIB) $(BUILT_INS) $(OTHER_PROGRAMS) GIT-BUILD-OPTIONS
ifneq (,$X)
@@ -2336,6 +2343,12 @@ mergetools_instdir_SQ = $(subst ','\'',$(mergetools_instdir))
install_bindir_programs := $(patsubst %,%$X,$(BINDIR_PROGRAMS_NEED_X)) $(BINDIR_PROGRAMS_NO_X)
+profile-install: profile
+ $(MAKE) install
+
+profile-fast-install: profile-fast
+ $(MAKE) install
+
install: all
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(bindir_SQ)'
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(gitexec_instdir_SQ)'