Date: Tue, 26 Mar 2002 13:58:08 -0500 From: "Brian F. Feldman" <green@FreeBSD.ORG> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: sw@anthologeek.net, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: ports/lang Makefile ports/lang/icc Makefile distinfo pkg-comment pkg-descr pkg-plist ports/lang/icc/files patch-include Message-ID: <200203261858.g2QIw8o86204@green.bikeshed.org> In-Reply-To: Your message of "Tue, 26 Mar 2002 18:39:22 %2B0100." <200203261739.g2QHdM1Z009901@Magelan.Leidinger.net>
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Alexander Leidinger <Alexander@Leidinger.net> wrote: > On 26 Mär, Sameh Ghane wrote: > > >> > Log: > >> > This is Intels C/C++ compiler. It is setup to produce native FreeBSD objects. > >> > This port is not able to produce native executables on its own. You need to do > >> > it yourself with gcc. > >> > >> I've seen a speed increase of ~20% (compared to gcc produced code) in > >> some test cases. Just in case some is interested. > > > > Of course we are interested in such speed improvements ! > > > > Can we build kernel with this (with gcc's help) ? > > Feel free to try it and to send patches if it doesn't. :-) I think we'd really have to move every bit of __asm__() out and only use actual .[Ss] files, or provide some alternative form of in-line assembly. I haven't determined if icc provides in-line assembly at all; even if it did, it would be totally backward from the syntax we currently use in the most basic ways, so it would be impossible to write to both of them. > > What about servers like Apache (it would be great for busy servers) ? > > I've seen this speed improvement in FPU intensive code (no MMX or SIMD > used, plain FPU code, testet on an AMD Duron). I don't expect such a > large speed improvement in "ordinary server code". And trust me, it > would be a lot of hassle to get apache compiled with icc. I got Ruby compiled with icc some weeks back and I seem to recall around a 20% speed improvement, as well. An interpreter is a good benchmark for a compiler's ability to generate both fast and correct code :) -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org <> bfeldman@tislabs.com \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the messagehelp
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