On 9/22/05, jason <[EMAIL PROTECTED]> wrote: > Andrew P. wrote: > > >Hello! > > > >So I have a Sempron 2500+ CPU, one that supports > >SSE3. What should I place in my /etc/make.conf? I use > >ssh with X11Forward very often, so OpenSSL should > >be compiled to be as fast as it can be on this CPU. > >Here's a part of dmesg: > > > >CPU: AMD Sempron(tm) Processor 2500+ > >(1407.05-MHz 686-class CPU) > >Origin = "AuthenticAMD" Id = 0x20fc2 Stepping = 2 > > > > Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR, > >PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV, > >PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2> > > Features2=0x1<SSE3> > > AMD Features=0xe2500800<SYSCALL,NX,MMX+, > ><b25>,LM,3DNow+,3DNow> > > > >I want to use SSE3, but I don't want to set CPUTYPE > >to nocona, cause that way compilers won't ever use > >AMD features. Is there a way to tell compilers to use > >every feature I've got? > > > > > >Thanks very much, > >Andrew P. > >_______________________________________________ > >freebsd-questions@freebsd.org mailing list > >http://lists.freebsd.org/mailman/listinfo/freebsd-questions > >To unsubscribe, send any mail to "[EMAIL PROTECTED]" > > > > > > > man make.conf and man gcc > > You will be limited by the gcc version on FreeBSD. You can use gcc 4 > for your apps, and all that SSE and 3DNow stuff is not currently > allowed in the kernel. > > I remember ready, maybe on slashdot, where a man did very little work to > do a native port of ssh to native amd64 code and got a hugh speed > boost. Making sure you get a optimized version os ssh like what I > described will make a much bigger difference than just adding amd64 as > your cp type to make.conf. > > Jason
I run FreeBSD/i386, not amd64. make.conf, gcc and cpp manpages tell you nothing about the subj. I roamed mailing lists for a few hours and settled on adding "-march=pentium4 -msse3" to CFLAGS and COPTFLAGS. I didn't do any serious benchmarking, but the `top` output feels like sshd got 2-3% performance boost. Will try to recompile with "-mfpmath=sse" later. Also, I tried forwarding X11 over network without SSH, and some things kept lagging. My guess is network connection and my solution is a Gigabit switch; the funny thing is that I have Gb NICs in most of my PCs, but I still use a 100Mb switch. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"