[tip:perf/urgent] perf tools: Allow shuffling the build tests

[tip:perf/urgent] perf tools: Allow shuffling the build tests

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  98916392a0bdfd71668b711fd93915791f45df02
Gitweb:     http://git.kernel.org/tip/98916392a0bdfd71668b711fd93915791f45df02
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Wed, 4 Nov 2015 16:25:32 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 5 Nov 2015 11:39:54 -0300

perf tools: Allow shuffling the build tests

Those tests take a long time and sometimes we stop it, so allow randomly
shuffling the tests so that we have a better chance of running more of
them in partial 'make build-test' runs.

Using it just on the 'build-test' target, i.e.:

   make -C tools/perf build-test

Is equivalent to:

   make SHUF=1 -C tools/perf -f tests/make

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ey7461i9q4k8u0987j8guun6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Makefile   | 2 +-
 tools/perf/tests/make | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 480546d..dcd9a70 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:
-	@$(MAKE) -f tests/make --no-print-directory
+	@$(MAKE) SHUF=1 -f tests/make --no-print-directory
 
 #
 # All other targets get passed through:
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index 2cbd0c6..8ea3dff 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -221,6 +221,11 @@ test_O = $(if $(test_$1),$(test_$1),$(test_default_O))
 
 all:
 
+ifdef SHUF
+run := $(shell shuf -e $(run))
+run_O := $(shell shuf -e $(run_O))
+endif
+
 ifdef DEBUG
 d := $(info run   $(run))
 d := $(info run_O $(run_O))