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ANTS Performance Profiler 6
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Greater than one thousand percent processor time

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camios



Joined: 08 Jul 2011
Posts: 6

PostPosted: Fri Jul 08, 2011 5:05 am    Post subject: Greater than one thousand percent processor time Reply with quote

See the screen shot. ANT Performance Profiler 6.2 is reporting greater than 1000% Processor Time
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Chris.Allen



Joined: 12 Mar 2009
Posts: 594

PostPosted: Fri Jul 08, 2011 9:53 am    Post subject: Reply with quote

Are you trying to crack AES? Wink)))
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Chris.Allen



Joined: 12 Mar 2009
Posts: 594

PostPosted: Fri Jul 08, 2011 9:58 am    Post subject: Reply with quote

No but seriously, (and I've never agreed with this but ...) ANTS' "percentage" value is a function of the number of cores. How many cores do you have?
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camios



Joined: 08 Jul 2011
Posts: 6

PostPosted: Mon Jul 11, 2011 12:18 am    Post subject: Re: Reply with quote

Chris.Allen wrote:
No but seriously, (and I've never agreed with this but ...) ANTS' "percentage" value is a function of the number of cores. How many cores do you have?


I have a basic Intel Core 2 Duo T9900 (i.e. 2 cores).
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AndrewH



Joined: 17 Aug 2006
Posts: 137

PostPosted: Tue Jul 12, 2011 10:28 am    Post subject: Reply with quote

ANTS reports the same values here as perfmon would. Unfortunately, Microsoft's implementation of performance counters are glitchy and can produce out of range values like this. Normally it happens if they're read too frequently, but this can also happen at times of high system load.

The same effect will be visible in perfmon, but it's not as noticeable as perfmon overwrites previous data after a minute.

There's not a lot that ANTS can do about this: the most common glitch is to read too low, which can't be distinguished from a valid value. With some counters, like this one, it will 'make up' the 0 values with a large spike - note that the spike is in the middle of a series of values that are 0. The real value was probably constant at 100 over that time, and the performance counter has chosen glitchy values that wind up averaging out to about that over a longer period of time.
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