[xep-support] Performance and synchronization

[David Tolpin]

On 22.04.2005, at 23:23, Irv Salisbury III wrote:

> I am not using En Masse.  I am using straight up XEP.  It definitely 
> is in the XEP code.  (As can be expected from your previous emails)  I 
> wrote a load balancer specific to our app and it now scales linearly.  
> (With XEP in only one thread per VM)
>
> Try testing with straight up XEP and you will see the contention.  On 
> solaris, you can actually use a status tool to see the contention.
>

Irv,

CLISER/EnMasse IS a straight up XEP with several threads running inside 
a single virtual machine. I have tested on a multi-processor 
configuration with multiple threads, and I don't see contention. Could 
you please find out and check what exact stage of formatting causes 
contention in your case?

My previous e-mails had explained what was synchronized in the 
formatting kernel, but these synchronization do not cause noticeable 
slow-down - they are infrequent and critical sections are short.

David

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