Re: SMP detection

2006-09-01 Thread backyard
--- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > 2006/8/31, Skylar Thompson <[EMAIL PROTECTED]>: > > > > Michal Mertl wrote: > > > No! Kernel threads (e.g. handling interrupts) > aren't that much different > > > to normal processes. > > > > > > Logical CPUs on a single HTT capable CPU share > mos

Re: shared cache -- Re: SMP detection

2006-09-01 Thread Scott Bennett
On Thu, 31 Aug 2006 08:18:57 -0700 (PDT) backyard <[EMAIL PROTECTED]> wrote: >--- "Chad Leigh -- Shire.Net LLC" <[EMAIL PROTECTED]> >wrote: > >> >> On Aug 30, 2006, at 12:12 PM, backyard wrote: >> >> > with HT disabling in FreeBSD is more for the >> security >> > issues about a potential ex

Re: SMP detection

2006-09-01 Thread Scott Bennett
On Thu, 31 Aug 2006 07:05:05 -0700 (PDT) [EMAIL PROTECTED] wrote: >--- Skylar Thompson <[EMAIL PROTECTED]> wrote: > >> Jordi Carrillo wrote: >> > 2006/8/30, backyard <[EMAIL PROTECTED]>: >> >> >> >> >> >> >> >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: >> >> >> >> > I've read that SMP sho

Re: SMP detection

2006-08-31 Thread backyard
--- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > 2006/8/31, backyard <[EMAIL PROTECTED]>: > > > > --- Michal Mertl <[EMAIL PROTECTED]> wrote: > > > > > Skylar Thompson wrote: > > > > Jordi Carrillo wrote: > > > > > 2006/8/30, backyard > > > <[EMAIL PROTECTED]>: > > > > >> > > > > >> > > > > >> >

Re: SMP detection

2006-08-31 Thread Jordi Carrillo
2006/8/31, backyard <[EMAIL PROTECTED]>: --- Michal Mertl <[EMAIL PROTECTED]> wrote: > Skylar Thompson wrote: > > Jordi Carrillo wrote: > > > 2006/8/30, backyard > <[EMAIL PROTECTED]>: > > >> > > >> > > >> > > >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > > >> > > >> > I've read that SMP s

Re: SMP detection

2006-08-31 Thread Michal Mertl
backyard píše v čt 31. 08. 2006 v 07:45 -0700: > --- Michal Mertl <[EMAIL PROTECTED]> wrote: > > > Skylar Thompson wrote: > > > Jordi Carrillo wrote: > > > > 2006/8/30, backyard > > <[EMAIL PROTECTED]>: > > > >> > > > >> > > > >> > > > >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > > > >> > >

Re: shared cache -- Re: SMP detection

2006-08-31 Thread Josh Carroll
Core 2 Duos have the EM64T extensions. Core Duos (Yonah) are a mobile chip only, not a full line of processors like the Core 2 architecture (Merom, Conroe, Woodcrest). I suspect the Core 2 chips do not suffer from the same security implications as HT-enabled processors. I'm not certain, but I thi

Re: shared cache -- Re: SMP detection

2006-08-31 Thread backyard
--- "Chad Leigh -- Shire.Net LLC" <[EMAIL PROTECTED]> wrote: > > On Aug 30, 2006, at 12:12 PM, backyard wrote: > > > with HT disabling in FreeBSD is more for the > security > > issues about a potential exploit whereby one > process > > in one pipe can access the priveledged information > of >

Re: SMP detection

2006-08-31 Thread backyard
--- Michal Mertl <[EMAIL PROTECTED]> wrote: > Skylar Thompson wrote: > > Jordi Carrillo wrote: > > > 2006/8/30, backyard > <[EMAIL PROTECTED]>: > > >> > > >> > > >> > > >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > > >> > > >> > I've read that SMP should be disabled for > > >> > performance i

Re: SMP detection

2006-08-31 Thread backyard
--- Skylar Thompson <[EMAIL PROTECTED]> wrote: > Jordi Carrillo wrote: > > 2006/8/30, backyard <[EMAIL PROTECTED]>: > >> > >> > >> > >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > >> > >> > I've read that SMP should be disabled for > >> > performance issues (I did not know > >> > that before

Re: SMP detection

2006-08-31 Thread Michal Mertl
Skylar Thompson wrote: > Michal Mertl wrote: > > No! Kernel threads (e.g. handling interrupts) aren't that much different > > to normal processes. > > > > Logical CPUs on a single HTT capable CPU share most of the CPU logic, > > especially all the external stuff (handling interrupts). Scheduling >

Re: SMP detection

2006-08-31 Thread Jordi Carrillo
2006/8/31, Skylar Thompson <[EMAIL PROTECTED]>: Michal Mertl wrote: > No! Kernel threads (e.g. handling interrupts) aren't that much different > to normal processes. > > Logical CPUs on a single HTT capable CPU share most of the CPU logic, > especially all the external stuff (handling interrupts

Re: SMP detection

2006-08-30 Thread Skylar Thompson
Michal Mertl wrote: > No! Kernel threads (e.g. handling interrupts) aren't that much different > to normal processes. > > Logical CPUs on a single HTT capable CPU share most of the CPU logic, > especially all the external stuff (handling interrupts). Scheduling > handling of interrupts on the "seco

Re: SMP detection

2006-08-30 Thread Michal Mertl
Skylar Thompson wrote: > Jordi Carrillo wrote: > > 2006/8/30, backyard <[EMAIL PROTECTED]>: > >> > >> > >> > >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > >> > >> > I've read that SMP should be disabled for > >> > performance issues (I did not know > >> > that before installing freebsd). I hav

Re: SMP detection

2006-08-30 Thread backyard
--- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > 2006/8/30, backyard <[EMAIL PROTECTED]>: > > > > > > > > --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > > > > > I've read that SMP should be disabled for > > > performance issues (I did not know > > > that before installing freebsd). I have a P4 >

Re: SMP detection

2006-08-30 Thread Skylar Thompson
Jordi Carrillo wrote: > Skylar, > So, 50% is used for processes and the other 50% to handle hardware > interrupts. Is that right? > I believe so, but the blurb that I read that in is from 2003. There's a good chance someone will jump in to correct me. :) It was in /usr/src/UPDATING: 20031022:

shared cache -- Re: SMP detection

2006-08-30 Thread Chad Leigh -- Shire.Net LLC
On Aug 30, 2006, at 12:12 PM, backyard wrote: with HT disabling in FreeBSD is more for the security issues about a potential exploit whereby one process in one pipe can access the priveledged information of a process in another pipe because the two cores share one processor cache and thus one c

Re: SMP detection

2006-08-30 Thread Jordi Carrillo
Skylar, So, 50% is used for processes and the other 50% to handle hardware interrupts. Is that right? 2006/8/30, Skylar Thompson <[EMAIL PROTECTED]>: Jordi Carrillo wrote: > 2006/8/30, backyard <[EMAIL PROTECTED]>: >> >> >> >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: >> >> > I've read that

Re: SMP detection

2006-08-30 Thread Skylar Thompson
Jordi Carrillo wrote: > 2006/8/30, backyard <[EMAIL PROTECTED]>: >> >> >> >> --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: >> >> > I've read that SMP should be disabled for >> > performance issues (I did not know >> > that before installing freebsd). I have a P4 3GHz >> > with hyperthreading >> > t

Re: SMP detection

2006-08-30 Thread Jordi Carrillo
2006/8/30, backyard <[EMAIL PROTECTED]>: --- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > I've read that SMP should be disabled for > performance issues (I did not know > that before installing freebsd). I have a P4 3GHz > with hyperthreading > technology. I have the SMP-GENERIC kernel and it

Re: SMP detection

2006-08-30 Thread backyard
--- Jordi Carrillo <[EMAIL PROTECTED]> wrote: > I've read that SMP should be disabled for > performance issues (I did not know > that before installing freebsd). I have a P4 3GHz > with hyperthreading > technology. I have the SMP-GENERIC kernel and it > only launches one cpu. So, > I've decided

Re: SMP detection

2006-08-30 Thread Simon Phoenix
On Wednesday 30 August 2006 20:20, Jordi Carrillo wrote: > I've read that SMP should be disabled for performance issues (I did not > know that before installing freebsd). I have a P4 3GHz with hyperthreading > technology. I have the SMP-GENERIC kernel and it only launches one cpu. So, > I've decide

Re: SMP detection

2006-08-30 Thread Skylar Thompson
Jordi Carrillo wrote: > I've read that SMP should be disabled for performance issues (I did > not know > that before installing freebsd). I have a P4 3GHz with hyperthreading > technology. I have the SMP-GENERIC kernel and it only launches one > cpu. So, > I've decided to disable SMP from BIOS. Is