Re: [Gems-users] ruby cycles


Date: Wed, 27 Feb 2008 14:04:52 -0600
From: Dan Gibson <degibson@xxxxxxxx>
Subject: Re: [Gems-users] ruby cycles
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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