Re: implications of SMP kernel on UP

2004-04-02 Thread Robert Watson
On Thu, 1 Apr 2004, Thierry Herbelot wrote: > Le Thursday 01 April 2004 09:10, Bjoern A. Zeeb a écrit : > > Hi, > > > > what are the implications on running an SMP enabled kernel on a UP > > machine ? > > > > I first thought of things like: > > - performence (most likely not worth the discussion

Re: implications of SMP kernel on UP

2004-04-02 Thread Helge Oldach
Thierry Herbelot: >Le Thursday 01 April 2004 09:10, Bjoern A. Zeeb a écrit : >> what are the implications on running an SMP enabled kernel on a UP >> machine ? >> >> I first thought of things like: >> - performence (most likely not worth the discussion ?) > >I got an improvement with a factor of te

Re: implications of SMP kernel on UP

2004-04-02 Thread Thierry Herbelot
Le Thursday 01 April 2004 09:10, Bjoern A. Zeeb a écrit : > Hi, > > what are the implications on running an SMP enabled kernel on a UP > machine ? > > I first thought of things like: > - performence (most likely not worth the discussion ?) I got an improvement with a factor of ten between an SMP a

Re: implications of SMP kernel on UP

2004-04-02 Thread Robert Watson
On Thu, 1 Apr 2004, Bjoern A. Zeeb wrote: > what are the implications on running an SMP enabled kernel on a UP > machine ? > > I first thought of things like: > - performence (most likely not worth the discussion ?) > - additional locking problematic ? > - ... ? > > Or asked the other way roun

Re: implications of SMP kernel on UP

2004-04-01 Thread Claudiu Dragalina-Paraipan
hello, what about SMP enabled kernel on Intel P4 with HT technology ? I have one but I didn't had the chance to test it yet. Colin Percival wrote: > At 08:10 01/04/2004, Bjoern A. Zeeb wrote: > >>what are the implications on running an SMP enabled kernel on a UP >>machine ? >> >>I first thought of

Re: implications of SMP kernel on UP

2004-04-01 Thread Colin Percival
At 08:10 01/04/2004, Bjoern A. Zeeb wrote: >what are the implications on running an SMP enabled kernel on a UP >machine ? > >I first thought of things like: >- performence (most likely not worth the discussion ?) At least in 5.2-RELEASE, there is a significant performance delta; buildworld takes

implications of SMP kernel on UP

2004-03-31 Thread Bjoern A. Zeeb
Hi, what are the implications on running an SMP enabled kernel on a UP machine ? I first thought of things like: - performence (most likely not worth the discussion ?) - additional locking problematic ? - ... ? Or asked the other way round: why would I want to disable SMP on a kernel that is go