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POHow to Identify where Instances of an object are Still Referenced?
 

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    <p>After running the VS2010 profiler with Object Lifetime Tracking in my app, I have this on a particular class :</p> <p><strong>Number of Instances</strong>----------<strong>1 418 276<br></strong> %Total Instances --------------------- %5.8<br> Total Bytes Allocated ------- 158 846 912<br> %Total Bytes -------------------------- %5.94<br> Gen 0 Instances Collected --------- 5 196<br> Gen 1 Instances Collected --------54 894<br> <strong>Gen 2 Instances Collected</strong> ----<strong>747 874<br></strong> <strong>Instances Alive At End</strong> --------- <strong>610 312<br></strong> Gen 0 Bytes Collected ----------- 581 952<br> Gen 1 Bytes Collected ---------6 148 128<br> Gen 2 Bytes Collected ---------3 761 888<br></p> <p>As you cans see, <strong>half of all created instances</strong> end up mainly as <strong>Gen 2</strong>, and <strong>the other half is staying alive until the end of the App</strong>. [<em>ha, ha, ha, ha, staying alive, staying alive...</em> -> <em>Ok sorry, I could'nt resist...</em>]</p> <p>What bothers me is that these instances should have a very short lifetime (It's basically a datafield class - that could be a struct, but I preferred to make it a class to "activate" GC on it). <br>These instances are created by reading very large binary files (each line being a class/ a record) and passed via a small sized queue by delegate/event to workers that basically just read it, put it in queues (which are <em>very regularly</em> dequeued), and then terminate (background workers ending normally). I guess Events are unsubscribed to when workers no more exist.</p> <p>So, <strong>is there a way to identify where are these references hiding</strong> ? Because if they are not GC'd they ARE still referenced somewhere, but how to tell for sure ? I'm tired of guessing and trying so many hypothesis SO if somebody has more rational guidelines or a fair checklist and/or tools / precise profiler places to look at, I welcome it.</p> <p><strong>Complementary Resources to the Answers</strong><br> <a href="http://blogs.msdn.com/b/mohamedg/archive/2010/03/02/visual-gcroot-via-dgml.aspx" rel="nofollow">Visual GCRoot via DGML</a> - Thanks to Richard Szalay<br> Also, this video <a href="http://www.screencast.com/t/NWY2Njcx" rel="nofollow">GCRoot Demo</a> from Chris Lovett is very educative on the subject. </p>
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    1. CO*Still alive*, not *stay alive*...
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    2. CO@SnowBear : I knew I couldn't trust the Bee Gees...
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    3. CO@OffTopic : Ha ! I did it ! I've reached ONE 1000 REPUTATION ! My wife keeps telling me it's not like if they were convertible into Dollars, but still, I'm a happy Nerd anyway and nothing is gonna stop this Joy ! :-))))
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