[ python-Bugs-884020 ] opcode prediction distorts dynamic execution profile stats

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Bugs item #884020, was opened at 2004-01-25 01:34
Message generated for change (Settings changed) made by rhettinger
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Category: Python Interpreter Core
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Andrew I MacIntyre (aimacintyre)
Assigned to: Raymond Hettinger (rhettinger)
Summary: opcode prediction distorts dynamic execution profile stats

Initial Comment:
By defining DYNAMIC_EXECUTION_PROFILE (and DXPAIRS if
you want opcode pair counts), opcode frequencies can be
evaluated for various program runs.

However successful opcode predictions bypass the
counter updates, which happen at the top of the loop.

So the result can be significantly under-represented
opcodes in the total statistics.

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>Comment By: Raymond Hettinger (rhettinger)
Date: 2004-02-08 15:06

Message:
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Applied patch 884022.

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Comment By: Andrew I MacIntyre (aimacintyre)
Date: 2004-01-25 01:47

Message:
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See patch #884022 for a possible fix/work around.

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https://sourceforge.net/tracker/?func=detail&atid=105470&aid=884020&group_id=5470