Subject: Re: SymCache optimization (was Re: New ld.elf_so from FreeBSD)
To: Charles Hannum <abuse@spamalicious.com>
From: Matt Thomas <matt@3am-software.com>
List: tech-toolchain
Date: 09/05/2002 18:53:43
At 02:39 PM 9/5/2002, Charles Hannum wrote:
>Actually, there is another solution for C++ startup performance:
>Solaris's `-z combreloc'. It appears that BFD already sorts
>relocations by symbol, so the only support necessary for this is in
>ld.elf_so. I've checked in some changes, for i386, `#ifdef
>COMBRELOC', that implement this. You can see that it's trivial.
I don't see that. From libstdc++.so via readelf -a:
001495a0 00020
R_SPARC_64 0000000000149548 cout + 0
001495d8 00020
R_SPARC_64 00000000001495d8 cin + 10
001495e8 00020
R_SPARC_64 0000000000149ae0 _IO_stdin_buf + 0
001495f0 00020
R_SPARC_64 0000000000149548 cout + 0
00149630 00020
R_SPARC_64 0000000000149630 clog + 8
00149638 00020
R_SPARC_64 0000000000149c10 _IO_stderr_buf + 0
00149640 00020
R_SPARC_64 0000000000149548 cout + 0
Notice that cout is not in adjacent reloc.
--
Matt Thomas Internet: matt@3am-software.com
3am Software Foundry WWW URL: http://www.3am-software.com/bio/matt/
Cupertino, CA Disclaimer: I avow all knowledge of this message