On 03-Mar-2003 Petri Helenius wrote: > After some reading around I ended up putting a return; on top of > the mptable_hyperthread_fixup function and my performance is back. > Setting the sysctl helps some but it does not really fix the performance issues. > > I would like to make the suggestion of making the HT "fixup" maybe a default > but allow disabling with a kernel variable?
I'm going to add a 'HTT' kernel option that I'll backport prior to 4.8. > Pete > > On Mon, 3 Mar 2003, Petri Helenius wrote: > >> >> I seem to want to quite the opposite what other people would like to happen, >> we have a supermicro P4DPR board with two Xeon´s. Since lately the kernel seems to >> want to launch the virtual cores regardless of BIOS setting of HyperThreading being >> [Disabled]. >> >> Any ideas how to disable the cores since our workload is does not benefit from >> having more than two cores in a machine. >> >> Pete >> > > Currently, AFAIK, there is no way to do this. > > Depending on what you are doing you can increase performance slightly by > setting machdep.cpu_idle_hlt=1 > > -Trish > > -- > Trish Lynch [EMAIL PROTECTED] > Ecartis Core Team [EMAIL PROTECTED] > EFNet IRC Operator @ efnet.demon.co.uk [EMAIL PROTECTED] > EFNet IRC Operator/SysAdmin @ irc.dkom.at [EMAIL PROTECTED] > Key fingerprint = 781D 2B47 AA4B FC88 B919 0CD6 26B2 1D62 6FC1 FF16 > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-current" in the body of the message -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
