Date: Mon, 04 Jun 2007 08:26:34 -0700 From: Garrett Cooper <youshi10@u.washington.edu> To: Joao Barros <joao.barros@gmail.com> Cc: current@freebsd.org Subject: Re: Kudos to everyone who worked on the gcc-4.2 merge Message-ID: <46642F2A.8000501@u.washington.edu> In-Reply-To: <70e8236f0706040705h6d459373n8fa83b32aeaca117@mail.gmail.com> References: <Pine.LNX.4.43.0706031730150.8063@hymn03.u.washington.edu> <20070604091628.51e9632a@kan.dnsalias.net> <70e8236f0706040705h6d459373n8fa83b32aeaca117@mail.gmail.com>
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Joao Barros wrote: > On 6/4/07, Alexander Kabaev <kabaev@gmail.com> wrote: >> On Sun, 3 Jun 2007 17:30:15 -0700 (PDT) >> youshi10@u.washington.edu wrote: >> >> > I just wanted to thank everyone who helped make the gcc 4.2 merge >> > possible -- I can see a noticeable performance increase (1.5x ~ 2.0x >> > load time decrease) in my server (P4 HTT with SMP). >> > >> > This will be one of the great changes that will put FreeBSD back on >> > the map closer to many Linux distros. >> > >> > Once gcc 4.2.1 gets in the tree, things will be much better, I'm >> > sure :). >> > >> > Thank you very much, and let me know if you need testing with gcc >> > 4.2.1 when it rolls around ;). >> > >> > -Garrett >> > >> Thanks, but I think kudos are addressed to wrong people. I very much >> doubt that GCC can be responsible for any, let alone dramatic, >> performance differences. Most likely you see effects of hard work done >> by SMP scalability guys. >> >> -- >> Alexander Kabaev >> >> > > I emailed Garrett but forgot to cc current@ > > My question was: "Can you specify the workload that you verify that > much improvement?" > Like you I had my doubts gcc was responsible for such an improvement. > > The differences I saw (ok, limited), were a decrease in bootup time (about 15-30 seconds faster), login via ssh (almost instantaneous when the sshd thread seemingly hasn't gone to sleep), restarting the samba daemon (3 seconds to ~1 second), and running make buildworld and installworld. The only thing that I've noticed so far is that acpi is broken again... I was shocked when I hit my power button and my machine instantly shut off 0_0... Synced to HEAD yesterday and rebuilt. ASUS P4800DX motherboard with a P4 3.0GHz Northwood chip. -Garrett
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