Messages in this thread | | | Date | Sat, 26 Jan 2013 13:52:08 +0100 | From | Borislav Petkov <> | Subject | Re: [tip:x86/asm] x86/defconfig: Turn on CONFIG_CC_OPTIMIZE_FOR_SIZE= y in the 64-bit defconfig |
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On Sat, Jan 26, 2013 at 04:25:57AM -0800, tip-bot for Ma Ling wrote: > During the same time (269.410275674 seconds) IPC from Os is > 0.37, O2 is 0.36, Os improved performance 2.7%. > > Signed-off-by: Ma Ling <ling.ml@alipay.com> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Arjan van de Ven <arjan@linux.intel.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Jan Beulich <jbeulich@suse.com> > Cc: Steven Rostedt <rostedt@goodmis.org> > Link: http://lkml.kernel.org/r/1359123061-6139-1-git-send-email-ling.ma@alipay.com > [ So, this is a bit symbolic as most people don't use the defconfig, > but the measurements are useful nevertheless so let's commit this > if there are no objections. ]
What about
commit 3a55fb0d9fe8e2f4594329edd58c5fd6f35a99dd Author: Kirill Smelkov <kirr@mns.spb.ru> Date: Fri Nov 2 15:41:01 2012 +0400
Tell the world we gave up on pushing CC_OPTIMIZE_FOR_SIZE
?
Reportedly, -Os generates suboptimal code in certain cases and we advise against it with this patch.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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