linux-kernel - Re: [PATCH 1/2] kbuild: Support split debug info v3

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Message-ID: <20140723182802.GV18735@two.firstfloor.org>
Date:	Wed, 23 Jul 2014 20:28:02 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Andi Kleen <ak@...ux.intel.com>, Andi Kleen <andi@...stfloor.org>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dirk Gouders <dirk@...ders.net>, mmarek@...e.cz
Subject: Re: [PATCH 1/2] kbuild: Support split debug info v3

> echo time make -j4 -s KCFLAGS=-gsplit-dwarf
> time make -j4 -s KCFLAGS=-gsplit-dwarf
> echo time make -j4 -s KCFLAGS=-g
> time make -j4 -s KCFLAGS=-g
> echo time make -j4 -s KCFLAGS=-gsplit-dwarf
> time make -j4 -s KCFLAGS=-gsplit-dwarf
> echo time make -j4 -s KCFLAGS=-g
> time make -j4 -s KCFLAGS=-g
> echo time make -j4 -s KCFLAGS=-gsplit-dwarf
> time make -j4 -s KCFLAGS=-gsplit-dwarf
> echo time make -j4 -s KCFLAGS=-g
> time make -j4 -s KCFLAGS=-g
> 
> The figures are from last run - but the other runs had compareable times.
> So in short I see a ~3 seconds speedup - out of 210 seconds.
> Thats less than I anticipated.

Thanks. How much smaller is it? 

Just saving disk space is a good thing.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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