Getting profiling info from Seaside in a VW environment..

I've got Seaside running under VW 7.4 and don't see the feature that I
saw under Squeak which was to show the profiling information for a page
once the halos were toggled.. Does this feature require some extra turn-on
to get it enabled?  I saw it by default in Squeak but can't seem to find
it on VW's bundled version..  Any ideas?

Thanks!


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Rick F. a écrit :

>I've got Seaside running under VW 7.4 and don't see the feature that I
>saw under Squeak which was to show the profiling information for a page
>once the halos were toggled.. Does this feature require some extra turn-on
>to get it enabled?  I saw it by default in Squeak but can't seem to find
>it on VW's bundled version..  Any ideas?
>
>  
>
Hi Rick,
This feature is currently restricted to Squeak, it has not been
translated into
the VW equivalent. Sorry for that. This is probably not too difficult to do,
using the AT Profiling stuff.
You may want to research this subject and contribute.
Michel.

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Since I am currently working on the VW port of 2.6a2 I had a look
to the profiling feature. It's quite easy to integrate and it will
be included in the next port.

A question though.

I noticed that profiling is only available for the rendering phase.
Sure, this is useful, but not as quite useful as profiling the callback
phase. Has anything tried for profiling the callback phase ?

Thanks,
Michel.


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On Jan 25, 2006, at 5:53 AM, Bany, Michel wrote:

It's actually harder to do than you would think, because often the  
callback phase involves the invocation of one or more continuations -  
which means that the stack is really messy.  Squeak's profiler,  
anyway, doesn't have an easy time with that.  I agree that it would  
be very useful, however, if someone finds a clever way to do it.

Avi
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I have written a decorator that logs a lot of interesting information
(in an extended common-log format) for the rendering and the
callback-phase, this includes simple profiling information. For the
callbacks I had to do some fancy continuation tricks, but it works.
The relevant piece of code is the one below (ugly):

processCallbackStream: aStream
        | timing continuation |
        timing := Time millisecondClockValue.
        continuation := self session instVarNamed: 'escapeContinuation'.
        self session instVarNamed: 'escapeContinuation' put: [ :value |
                self
                        logRequest: self session currentRequest nativeRequest
                        response: value kind: #callback
                        time: Time millisecondClockValue - timing.
                continuation value: value ].
        ^super processCallbackStream: aStream.

The timing is not entirely correct, but I guess it should give a
figure somewhere close to the real value. If necessary I can publish
the whole code, but I have to negotiate with netstyle.ch first ;-)

Lukas

--
Lukas Renggli
http://www.lukas-renggli.ch
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