On Fri, Mar 08, 2013 at 11:07:25AM +0100, Janne Johansson wrote: > 2013/3/8 Andres Perera <andre...@zoho.com> > > > wait wait ~ > > can someone comment on this > > http://www.daemonology.net/hyperthreading-considered-harmful/ ? > > is it still in vogue? > > > > I run very few obsd systems where people get to sit and measure cache > behaviour while I generate ssl/ssh keys, so even if it can be done, the > window seems small. > Disabling HT may be good for other reasons, so if you are scared of that, > just turn it off in the BIOS and forget about the problem. > > HT was good in a short period to accustom stiff old people to the fact that > SMP was coming. It's mostly irrelevant now, unless you spend ALL your cpu > on distributed.net/BOINC or similar house warming projects where all cores > are executing the same small code path all the time.
I don't believe it. Someone please compile a kernel with time make -j$(sysctl -n hw.ncpu) with or and without HT and report back... (and please, not on a space heater xeon 4 from 2003...) > > -- > May the most significant bit of your life be positive.
