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Date: Sun, 5 Nov 2006 07:30:37 +0100 From: Adrian Bunk <bunk@...sta.de> To: Arnaldo Carvalho de Melo <acme@...driva.com> Cc: Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org, lwn@....net Subject: Re: Top 100 inline functions (make allyesconfig) was Re: [ANNOUNCE] pahole and other DWARF2 utilities On Sat, Nov 04, 2006 at 06:03:32PM -0300, Arnaldo Carvalho de Melo wrote: > On Fri, Nov 03, 2006 at 04:07:29PM -0300, Arnaldo Carvalho de Melo wrote: > > On Mon, Oct 30, 2006 at 08:33:34PM -0800, Andrew Morton wrote: > > > On Mon, 30 Oct 2006 18:33:19 -0300 > > > Arnaldo Carvalho de Melo <acme@...driva.com> wrote: > > > > > > > Further ideas on how to use the DWARF2 information include tools > > > > that will show where inlines are being used, how much code is added by > > > > inline functions, > > > > > > It would be quite useful to be able to identify inlined functions which are > > > good candidates for uninlining. > > > > Top 50 inline functions expanded more than once by sum of its expansions > > in a vmlinux file built for qemu, most things are modules, columns are > > (inline function name, number of times it was expanded, sum in bytes of > > its expansions, number of source files where expansions ocurred): > > > > [acme@...toy guinea_pig-2.6]$ pfunct --total_inline_stats > > ../../acme/OUTPUT/qemu/net-2.6/vmlinux | grep -v ': 1 ' | sort -k3 -nr | > > head -50 > > > > get_current 676 5732 155 > > Ok, this time for a 'make allyesconfig' build, top 100, for the list of > all 6021 inline functions that were expanded more than once in this 281 > MB vmlinux image download the 93 KB files at: >... Thanks, this is interesting data. One thing you could do for improving the result: allyesconfig turns on all debugging option, and there might be functions that are significantely larger due to this fact. Unsetting *DEBUG* options in the .config might bring a better focus on the real-world problems. > - Arnaldo >... cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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