CPU utilisation

> I'm new here so I'm sorry if this is something already covered. I spent a bit of time browsing the archive but didn't see anything obvious.
>
> When Pharo is under load it doesn't appear to making use of all processor cores.
>
> I'm using Pharo-1.1.1-- Latest update: #11414 with VM 4.2.1b1 under Mac OS X with a Core 2 Duo.
>
> Attached is an image of the CPU history:
>
>
>
> The thing to notice is that it only appears to be using a single core at any one time.
>
> Is this a known issue?
>

> In addition to Igor comment, there is also some effort in trying to make
> multiple core vms. For example, https://github.com/smarr/RoarVM/
>
> Gemstone Smalltalk does use also different cores. And maybe Eliot is working
> on that for the CogVM (I don't know).
>
> Now I am wondering.....I remember (not sure) that in Linux you could specify
> which core to run certain process. If that is true, maybe you are able to
> run several vms at the same time in different cores?  I am thinking in case
> of having to scale a web application for example.
>

> Does someone know?
>
> thanks
>
> mariano
>
> On Thu, Dec 23, 2010 at 9:40 PM, Igor Stasenko <[hidden email]> wrote:
>>
>> On 23 December 2010 21:22, Phil <[hidden email]> wrote:
>> > I'm new here so I'm sorry if this is something already covered. I spent
>> > a bit of time browsing the archive but didn't see anything obvious.
>> >
>> > When Pharo is under load it doesn't appear to making use of all
>> > processor cores.
>> >
>> > I'm using Pharo-1.1.1-- Latest update: #11414 with VM 4.2.1b1 under Mac
>> > OS X with a Core 2 Duo.
>> >
>> > Attached is an image of the CPU history:
>> >
>> >
>> >
>> > The thing to notice is that it only appears to be using a single core at
>> > any one time.
>> >
>> > Is this a known issue?
>> >
>>
>> Yes. Squeak VM using green threading model - it runs a language-side
>> processes using single native thread.
>>
>> > Cheers,
>> >
>> > Phil
>> >
>>
>>
>>
>> --
>> Best regards,
>> Igor Stasenko AKA sig.
>>
>
>