[PATCH 1/1] perf build-test: Honour JOBS to override detection of

From: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
To: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/1] perf build-test: Honour JOBS to override detection of
Date: Mon, 30 Mar 2020 10:03:01 -0300	[thread overview]
Message-ID: <20200330130301.GA31702@kernel.org> (raw)

Jiri,

	Ack?

----

When one does:

  $ make -C tools/perf build-test

The makefile in tools/perf/tests/ will, just like the main one, detect
how many cores are in the system and use it with -j.

Sometimes we may need to override that, for instance, when using
icecream or distcc to use multiple machines in the build process, then
we need to, as with the main makefile, use:

  $ make JOBS=N -C tools/perf build-test

Fix the tests makefile to honour that.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/make | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index c850d1664c56..5d0c3a9c47a1 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -28,9 +28,13 @@ endif
 
 PARALLEL_OPT=
 ifeq ($(SET_PARALLEL),1)
-  cores := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
-  ifeq ($(cores),0)
-    cores := 1
+  ifeq ($(JOBS),)
+    cores := $(shell (getconf _NPROCESSORS_ONLN || egrep -c '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+    ifeq ($(cores),0)
+      cores := 1
+    endif
+  else
+    cores=$(JOBS)
   endif
   PARALLEL_OPT="-j$(cores)"
 endif
-- 
2.25.1

