On Friday 19 December 2003 23:34, Scott Long wrote: > On Fri, 19 Dec 2003, Mike Tancsa wrote: > > We are replacing a box that is fairly busy with many different processes > > (sendmail / pop3). The new MB and CPU is hyperthreading capable. Is it > > worth it to enable this ? Does anyone have any real world experiences > > with it in RELENG_4 that say one way or the other to use or not use it ? > > > > dmesg shows, > > > > CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2992.52-MHz 686-class CPU) > > Origin = "GenuineIntel" Id = 0xf29 Stepping = 9 > > > > Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE, > >MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,S SE2,SS,HTT,TM,PBE> > > Hyperthreading: 2 logical CPUs > > > > ---Mike > > HyperThreading usually requires special smarts in the OS process > scheduler so that the cores don't bottleneck each other with cache > thrashing and pipeline stalls/starvation. Without this, Hyperthreading > is usually slightly slower than non-Hyperthreading. 4.x does not have > a scheduler that understand HTT, but 5.2-CURRENT does.
Do you mean ULE or 4BSD regarding HTT capable? Thanks, -Harry > > Scott > _______________________________________________ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "[EMAIL PROTECTED]"
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