From: Kyungsik Lee <kyungsik.lee@lge.com> To: Andrew Morton <akpm@linux-foundation.org>, Michal Marek <mmarek@suse.cz> Cc: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, x86@kernel.org, celinux-dev@lists.celinuxforum.org, linux-arm-kernel@lists.infradead.org, hyojun.im@lge.com, chan.jeong@lge.com, raphael.andy.lee@gmail.com, Kyungsik Lee <kyungsik.lee@lge.com>, Thomas Gleixner <tglx@linutronix.de>, Russell King <rmk@arm.linux.org.uk>, Borislav Petkov <bp@alien8.de>, Florian Fainelli <florian@openwrt.org>, Yann Collet <yann.collet.73@gmail.com> Subject: [PATCH -next 1/2] arm: Remove enforced Os flag for LZ4 decompressor Date: Mon, 6 May 2013 17:42:54 +0900 [thread overview] Message-ID: <1367829775-4434-1-git-send-email-kyungsik.lee@lge.com> (raw) -Os is enforced here, based on the test result of decompression time below, slightly faster than -O2. But further tests with UA show that using -O2 will be the right choice especially in the case of the unaligned access enabled and the gap, few counts in the normal decompression mode is small enough to remove -Os. Decompression Time(counts) Normal UA enabled -Os 6717 3447 -O2 6720 2728 Note: ARM v7, Kernel 3.4 counter freq. = 32768 HZ UA(Unaligned Access) gcc version 4.6.2 Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Florian Fainelli <florian@openwrt.org> Cc: Yann Collet <yann.collet.73@gmail.com> --- arch/arm/boot/compressed/Makefile | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 001a13a..198a4ad 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -27,9 +27,6 @@ OBJS += misc.o decompress.o ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) OBJS += debug.o endif -ifeq ($(CONFIG_KERNEL_LZ4),y) -CFLAGS_decompress.o := -Os -endif FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c # string library code (-Os is enforced to keep it much smaller) -- 1.8.1.1
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From: kyungsik.lee@lge.com (Kyungsik Lee) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH -next 1/2] arm: Remove enforced Os flag for LZ4 decompressor Date: Mon, 6 May 2013 17:42:54 +0900 [thread overview] Message-ID: <1367829775-4434-1-git-send-email-kyungsik.lee@lge.com> (raw) -Os is enforced here, based on the test result of decompression time below, slightly faster than -O2. But further tests with UA show that using -O2 will be the right choice especially in the case of the unaligned access enabled and the gap, few counts in the normal decompression mode is small enough to remove -Os. Decompression Time(counts) Normal UA enabled -Os 6717 3447 -O2 6720 2728 Note: ARM v7, Kernel 3.4 counter freq. = 32768 HZ UA(Unaligned Access) gcc version 4.6.2 Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Florian Fainelli <florian@openwrt.org> Cc: Yann Collet <yann.collet.73@gmail.com> --- arch/arm/boot/compressed/Makefile | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 001a13a..198a4ad 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -27,9 +27,6 @@ OBJS += misc.o decompress.o ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) OBJS += debug.o endif -ifeq ($(CONFIG_KERNEL_LZ4),y) -CFLAGS_decompress.o := -Os -endif FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c # string library code (-Os is enforced to keep it much smaller) -- 1.8.1.1
next reply other threads:[~2013-05-06 8:43 UTC|newest] Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-05-06 8:42 Kyungsik Lee [this message] 2013-05-06 8:42 ` [PATCH -next 1/2] arm: Remove enforced Os flag for LZ4 decompressor Kyungsik Lee 2013-05-06 8:42 ` [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format Kyungsik Lee 2013-05-06 8:42 ` Kyungsik Lee 2013-05-06 9:51 ` Borislav Petkov 2013-05-06 9:51 ` Borislav Petkov 2013-07-10 8:12 ` Geert Uytterhoeven 2013-07-10 8:12 ` Geert Uytterhoeven 2013-07-10 8:12 ` Geert Uytterhoeven 2013-07-10 9:36 ` Borislav Petkov 2013-07-10 9:36 ` Borislav Petkov 2013-07-10 9:36 ` Borislav Petkov 2013-07-10 18:28 ` Markus Trippelsdorf 2013-07-10 18:28 ` Markus Trippelsdorf 2013-07-10 18:28 ` Markus Trippelsdorf 2013-07-10 18:28 ` Markus Trippelsdorf 2013-07-10 20:01 ` Borislav Petkov 2013-07-10 20:01 ` Borislav Petkov 2013-07-10 20:01 ` Borislav Petkov 2013-07-10 20:01 ` Borislav Petkov 2013-07-11 4:34 ` Kyungsik Lee 2013-07-11 4:34 ` Kyungsik Lee 2013-07-11 4:34 ` Kyungsik Lee 2013-07-11 4:34 ` Kyungsik Lee 2013-07-11 9:46 ` [PATCH] .gitignore: ignore *.lz4 files Markus Trippelsdorf 2013-07-11 9:46 ` Markus Trippelsdorf 2013-07-11 9:46 ` Markus Trippelsdorf 2013-07-11 9:46 ` Markus Trippelsdorf 2013-07-12 7:56 ` [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format Ingo Molnar 2013-07-12 7:56 ` Ingo Molnar 2013-07-12 8:01 ` Borislav Petkov 2013-07-12 8:01 ` Borislav Petkov 2013-07-12 10:13 ` Ingo Molnar 2013-07-12 10:13 ` Ingo Molnar 2013-07-12 10:23 ` Borislav Petkov 2013-07-12 10:23 ` Borislav Petkov 2013-07-12 11:18 ` Andrew Morton 2013-07-12 11:18 ` Andrew Morton 2013-07-12 12:06 ` Ingo Molnar 2013-07-12 12:06 ` Ingo Molnar 2013-07-12 12:13 ` Borislav Petkov 2013-07-12 12:13 ` Borislav Petkov 2013-07-12 12:34 ` Florian Fainelli 2013-07-12 12:34 ` Florian Fainelli 2013-07-12 12:34 ` Florian Fainelli 2013-07-12 12:46 ` Borislav Petkov 2013-07-12 12:46 ` Borislav Petkov 2013-07-12 12:46 ` Borislav Petkov 2013-07-15 22:03 ` Andrew Morton 2013-07-15 22:03 ` Andrew Morton 2013-07-15 22:08 ` H. Peter Anvin 2013-07-15 22:08 ` H. Peter Anvin 2013-07-16 7:47 ` Andrew Morton 2013-07-16 7:47 ` Andrew Morton 2013-07-16 7:56 ` Andrew Morton 2013-07-16 7:56 ` Andrew Morton 2013-07-16 8:08 ` Yann E. MORIN 2013-07-16 8:08 ` Yann E. MORIN 2013-07-16 8:27 ` Andrew Morton 2013-07-16 8:27 ` Andrew Morton 2013-07-16 9:05 ` Borislav Petkov 2013-07-16 9:05 ` Borislav Petkov 2013-07-16 9:12 ` Yann E. MORIN 2013-07-16 9:12 ` Yann E. MORIN 2013-07-16 9:22 ` Borislav Petkov 2013-07-16 9:22 ` Borislav Petkov 2013-07-16 9:32 ` Yann E. MORIN 2013-07-16 9:32 ` Yann E. MORIN 2013-07-16 9:38 ` Borislav Petkov 2013-07-16 9:38 ` Borislav Petkov 2013-07-16 9:45 ` Yann E. MORIN 2013-07-16 9:45 ` Yann E. MORIN 2013-07-16 9:59 ` Borislav Petkov 2013-07-16 9:59 ` Borislav Petkov 2013-07-16 10:04 ` Florian Fainelli 2013-07-16 10:04 ` Florian Fainelli 2013-07-16 10:04 ` Florian Fainelli 2013-07-16 18:04 ` Sam Ravnborg 2013-07-16 18:04 ` Sam Ravnborg 2013-07-17 21:16 ` Sam Ravnborg 2013-07-17 21:16 ` Sam Ravnborg 2013-07-17 21:44 ` Borislav Petkov 2013-07-17 21:44 ` Borislav Petkov 2013-07-17 22:30 ` Yann E. MORIN 2013-07-17 22:30 ` Yann E. MORIN 2013-07-17 23:22 ` H. Peter Anvin 2013-07-17 23:22 ` H. Peter Anvin 2013-07-18 8:02 ` Geert Uytterhoeven 2013-07-18 8:02 ` Geert Uytterhoeven 2013-07-18 8:02 ` Geert Uytterhoeven 2013-07-18 7:22 ` Geert Uytterhoeven 2013-07-18 7:22 ` Geert Uytterhoeven 2013-07-18 7:22 ` Geert Uytterhoeven 2013-07-18 7:34 ` Andrew Morton 2013-07-18 7:34 ` Andrew Morton 2013-07-18 7:34 ` Andrew Morton 2013-07-18 7:47 ` Yann E. MORIN 2013-07-18 7:47 ` Yann E. MORIN 2013-07-18 7:47 ` Yann E. MORIN 2013-07-18 7:52 ` Andrew Morton 2013-07-18 7:52 ` Andrew Morton 2013-07-18 7:52 ` Andrew Morton 2013-07-18 20:47 ` Sam Ravnborg 2013-07-18 20:47 ` Sam Ravnborg 2013-07-16 9:13 ` Florian Fainelli 2013-07-16 9:13 ` Florian Fainelli 2013-07-16 9:13 ` Florian Fainelli 2013-07-16 9:25 ` Yann E. MORIN 2013-07-16 9:25 ` Yann E. MORIN 2013-07-16 9:25 ` Yann E. MORIN
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