Re: [Gems-users] ruby cycles

["Carole-Jean Wu" <carolewu@xxxxxxxxxxxxx>]

Hello Dan,

I can confirm with you now.... the counter does overflow.

This is a sample result for fprintf( File, "%lld", mcycle)
.
.
.
4146000000      
4246000150    
139000000      
239000413      
339000862      
439001276       
539001713      
544000000       
644000538       
744000858       
793000000     
893000371      
993000796   
1093000839      
.
.
.
3627002781      
3727002825      
3813000000      
3913000278      
4013000668      
4113000796      
4213001291      
727000000  

Any ideas?
-Carole

On Wed, Feb 27, 2008 at 3:04 PM, Dan Gibson <degibson@xxxxxxxx> wrote:

I'm tempted to try to explain this as a cout formatting problem, since
it would be very unusual for time to be flowing backwards in Ruby,
especially by billions of cycles. Can you try printf("%lld\n",mcycles); ?

Regards,
Dan

Carole-Jean Wu wrote:

> I am using
>
> cout
>
> to print
>
> On Wed, Feb 27, 2008 at 2:57 PM, Dan Gibson <degibson@xxxxxxxx

> <mailto:degibson@xxxxxxxx>> wrote:
>
>     Time is typedef'd as an int64, so it shouldn't be overflowing until
>     values start to get to the 2^63 range. How are you printing the
>     values?
>
>     Regards,
>     Dan
>
>     Carole-Jean Wu wrote:
>     > Hello Dan,
>     >
>     > They are not continuously decreasing. For example, it will go up to
>     > 3x10^9 or a bit more, then a while later (at my next sample
>     interval),
>     > it becomes in the order of 10^8, and etc. Is it possible that
>     there is
>     > an overflow in the counter that holds ruby cycles?
>     >
>     >
>     > Thanks for your quick response,
>     > Carole
>     >
>     > On Wed, Feb 27, 2008 at 2:46 PM, Dan Gibson <degibson@xxxxxxxx
>     <mailto:degibson@xxxxxxxx>

>     > <mailto:degibson@xxxxxxxx <mailto:degibson@xxxxxxxx>>> wrote:
>     >
>     >     Are they decreasing? That would be very unusual indeed.
>     >
>     >     Carole-Jean Wu wrote:
>     >     > Hello,
>     >     >
>     >     > In ruby/system/Sequencer.C, I am getting ruby cycles from
>     >     >
>     >     > Time mcycles = g_eventQueue_ptr->getTime(); however, the ruby
>     >     cycles I
>     >     > am getting are not monotonically increasing. Does anyone
>     know what
>     >     > causes this problem?
>     >     >
>     >     >
>     >     >
>     >     > Thanks,
>     >     > Carole
>     >     >
>     >
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