Re: [Quantlib-dev] [Quantlib-users] QuantLibXL, Office 2007, dual core machines...

[Toyin A. <toy...@ho...>]

Hey Eric,

That's pretty cool.

Thanks for the update. I've just obtained a couple of new dual core servers 
to test stuff on...

Toy out.

>From: "eric ehlers" <eri...@gm...>
>To: "Toyin Akin" <toy...@ho...>
>CC: qua...@li...,qua...@li...
>Subject: Re: [Quantlib-users] QuantLibXL, Office 2007, dual core 
>machines...
>Date: Mon, 30 Jul 2007 11:10:53 +0200
>
>Hi Toyin,
>
>On 7/25/07, Toyin Akin <toy...@ho...> wrote:
> > Hi,
> >
> > I've been reading up on some of QuantLibXL docs and came across a 
>potential
> > issue with the way QuantLib is designed when run on Excel 2007 with
> > dual/quad core machines.
>
>When an XLL registers a function with Excel, the XLL may pass an
>additional new parameter recognized by Excel 2007 to indicate that the
>function is thread safe.  Excel 2007 invokes an XLL's functions in
>parallel only if they have been registered as thread safe.
>
>In other words, we can take our existing code as-is and run it under
>Excel 2007 and it should behave exactly as it did under earlier
>versions of Excel, with all calculations running in a single thread.
>
>Of course longer term we would like to take advantage of
>multithreading, and as you mention we would need to take account of
>QuantLib's processing of the evaluation date.  One simple approach
>would be to implement a startup routine which explicilty sets the
>evaluation date in each thread to be used by the XLL.
>
>Regards,
>Eric
>
>-------------------------------------------------------------------------
>This SF.net email is sponsored by: Splunk Inc.
>Still grepping through log files to find problems?  Stop.
>Now Search log events and configuration files using AJAX and a browser.
>Download your FREE copy of Splunk now >>  http://get.splunk.com/
>_______________________________________________
>QuantLib-users mailing list
>Qua...@li...
>https://lists.sourceforge.net/lists/listinfo/quantlib-users

_________________________________________________________________
The next generation of Hotmail is here!  http://www.newhotmail.co.uk