Re: [AMD64-SMP] I can't get my cpus working at 100%

Hi there,

On 24/08/06, Kris Kennaway <kris@xxxxxxxxxxxxxx> wrote:
[...]

How do you know the applications are running with two threads?
Presumably you need to specify the amount of parallelism.

Kris

To make matters worse you can't even tell if an application running
with several threads uses more then one CPU. Originally, threading was
implemented with single CPU systems in mind, especially in regard to
shares memory and things like this.
A nice example of a program being able to do threading, but one CPU
(core) only is python.
So you don't only want to know how many threads an application is
working with, but on what cores they are processed. You might want to
man ps for a list of possible option, I don't have a SMP system at
hand, but i think ps -aHl might be suitable.
_______________________________________________
freebsd-stable@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: [AMD64-SMP] I cant get my cpus working at 100%
    ... with several threads uses more then one CPU. ... implemented with single CPU systems in mind, ... but one CPU (core) only is python. ... threads for each running process are shown. ...
    (freebsd-stable)
  • Re: what are the most popular building and packaging tools for python ??
    ... I don't think it's a stretch to imagine a CPU core with a "secure kitchen" ... Using this kind of system, a customer would give you his CPU's public key and serial number, ... >net is available and must still offer full functionality no matter what. ...
    (comp.lang.python)
  • Re: new computer
    ... Core Duo. ... I also agree that Dell is the best "factory made". ... currently plan to use Vista). ... Is Dual CPU 1.6 Faster than Single CPU 3.4? ...
    (alt.sys.pc-clone.dell)
  • Re: 16-Node Parallel System
    ... Opteron soon will only be dual core. ... the interconnect of a SMP's 16 CPU interconnect will not ... >>>match the bandwidth of the sum of the bandwidth of the 8 interconnects ... >>>processes are fully independent (e.g. no cache line interference like ...
    (comp.parallel.mpi)
  • Re: MCE Rollup 2 Dual Processor support
    ... The AMD issue is/was that once you enable Cool&Quite ... CPU speed throttling, the CPU cores seem to be throttled independently ... As a result, when a thread is switched from one core to the other, ... > there are two separate CPUs, a HT CPU or a Dual Core CPU. ...
    (microsoft.public.windows.mediacenter)