linux-kernel - [PATCH v3 12/12] selftests/nolibc: speed up some targets with multiple jobs

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Message-Id: <ca03989b38085a74bde33b7dc5040b33a76f3c4b.1690489039.git.falcon@tinylab.org>
Date:   Fri, 28 Jul 2023 04:35:01 +0800
From:   Zhangjin Wu <falcon@...ylab.org>
To:     thomas@...ch.de, w@....eu
Cc:     falcon@...ylab.org, arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: [PATCH v3 12/12] selftests/nolibc: speed up some targets with multiple jobs

The sysroot install and kernel build targets are time cost, let's use
-j<N> to parallelize them with multiple jobs.

Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
---
 tools/testing/selftests/nolibc/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index ad2538ec5eb0..1b45c22f9a94 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -171,7 +171,7 @@ PHONY = sysroot/$(ARCH)/include
 sysroot/$(ARCH)/include:
 	$(Q)rm -rf sysroot/$(ARCH) sysroot/sysroot
 	$(QUIET_MKDIR)mkdir -p sysroot
-	$(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
+	$(Q)$(MAKE) -j$$(nproc) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
 	$(Q)mv sysroot/sysroot sysroot/$(ARCH)
 
 ifneq ($(NOLIBC_SYSROOT),0)
@@ -211,7 +211,7 @@ initramfs: nolibc-test
 	$(Q)cp nolibc-test initramfs/init
 
 # common macros for kernel targets
-MAKE_KERNEL   = $(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE)
+MAKE_KERNEL   = $(MAKE) -j$$(nproc) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE)
 KERNEL_CONFIG = $(objtree)/.config
 KERNEL_IMAGE  = $(objtree)/$(IMAGE)
 
-- 
2.25.1