so this means that the cpu which my request ran on is a much less
powerful one. Since the request takes much more cpu secs that it
should according to that equation. Right?
On Aug 17, 9:05 pm, Alkis Evlogimenos ('Αλκης Ευλογημένος)
<[email protected]> wrote:
> The cpu in the equation is a 1ghz equivalent cpu which is not necessarily
> the same as the cpu you request ran on.
>
> - alkis (mobile)
>
> On Aug 17, 2010 7:41 PM, "MyElasticEye" <[email protected]> wrote:
>
>
>
> > Hi,
>
> > I have been trying to optimize the App Engine application my team is
> > working on. As I read on Google's documentation,
>
> > 1 megacycles = 1/1200 cpu seconds
>
> > And if I a check how many megacycles it takes to load an empty sinlge
> > page without any templates using webapp.py, it takes 0 megacycles.
> > However, the amount of cpu miliseconds used for the request usually
> > becomes around 200 ms. That's understandable because of the overheads
> > of the request.
>
> > However, I see that when I do like:
>
> > class SomePage(..):
> > def get(self):
> > start = quota.get_request_cpu_usage()
> > # do some dense operations here...
> > end = quota.get_request_cpu_usage()
> > logging.info("the operation cost %d megacycles." % (start -
> > end))
> > return
>
> > I can't see a relation btw the megacycles it takes and the cpu
> > miliseconds used. According to the equation above, 1200 megacycles = 1
> > cpu second, and if the result of the operation is 2400 megacycles, it
> > means that it should equal to 2 cpu seconds. Let's say there is an
> > overhead occuring even if we load an empty page or whatever, and then
> > it should equal to 2400 + 200 = 2600 ms
>
> > However, the logs of the request says that it takes much more than 2
> > cpu secs, more like 7000 or 9000 cpu milisecs.
>
> > Why is this occuring?
>
> > Thanks
>
> > --
> > You received this message because you are subscribed to the Google Groups
>
> "Google App Engine" group.> To post to this group, send email to
> [email protected].
> > To unsubscribe from this group, send email to
>
> [email protected]<google-appengine%2Bunsubscrib
> [email protected]>
> .> For more options, visit this group at
>
> http://groups.google.com/group/google-appengine?hl=en.
>
>
>
>
--
You received this message because you are subscribed to the Google Groups
"Google App Engine" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-appengine?hl=en.
