Profile Performance and Memory shows very large 'VI Time' value

When I run the Profile Performance and Memory tool on my project, I get very large numbers for VI Time (and Sub VIs Time and Total Time) for some VIs. For example 1844674407370752.5. I have selected only 'Timing statistics' and 'Timing details'. Sometimes the numbers start with reasonable values, then when updating the display with the snapshot button they might get large and stay large. Other VI Times remain reasonable.
LabVIEW 2011 Version 11.0 (32-bit). Windows 7.
What gives?
- les

les,
the number indicates some kind of overroll.... so, do you have a vi where this happens all the time? Can you share this with us?
thanks,
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

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Profile Performance and memory

Hi, guys
I am trying to analysis my Profile Data for the Profile Performance and memory.
When I check the data for VI Time, I found there are same VIs with different VI Time, what is that mean
The reason why I am doing this is because I am going to add pulse model for my VI, so I need to know the relationship between my all instruments and time, Am I in the right track
Thanks
Solved!
Go to Solution.
Attachments:
VI Time.png ‏72 KB

It looks like the timing had a resolution of 15.6 ms, which I think is common on some flavors of the Windows OS. Note that the average times on some of those VIs is zero. This suggessts that for many of the 1878 runs the time was probably recorded as zero and a few were at 15.6 ms.
This is one of the limitations of the Profiler.
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Attachments:
Generate_Square_Pulse_With_TDMS_Stream.vi ‏13 KB
Square_Pulse.vi ‏13 KB
Write_TDMS_File.vi ‏27 KB

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Just to clarify the above, I understand how to write out the data in blocks; my question is: how do I ensure that memory is freed up between subsequent writes, and how do I ensure that memory is freed up after execution of the VI?
@Jeff: I'm generating the waveform here, not reading it. I guess I'm not generating a "waveform" but rather a set of doubles. However, converting that into an actual waveform can come later.
Thanks for the replies!
Attachments:
Generate_Square_Pulse_With_TDMS_Stream.vi ‏14 KB
Write_TDMS_File.vi ‏27 KB

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SQL*Plus: Release 11.2.0.2.0 Production on Mon Jun 20 09:19:49 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to an idle instance.
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DWH11.__large_pool_size=16777216
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DWH12.__pga_aggregate_target=2902458368
DWH11.__pga_aggregate_target=2902458368
DWH12.__sga_target=4328521728
DWH11.__sga_target=4328521728
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DWH11.__shared_io_pool_size=0
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DWH11.__shared_pool_size=956301312
DWH12.__streams_pool_size=0
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DWH11.thread=1
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# Kernel sysctl configuration file for Red Hat Linux
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
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net.ipv4.ip_forward = 0
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kernel.shmmni = 4096
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net.core.wmem_default = 262144
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Profile Performanc​e and Memory shows very large 'VI Time' value

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Profile Performance and Memory shows very large 'VI Time' value