Need a tool to identify the most cpu consuming thread.

I have the database Oracle running on Windows 2008 server edition.

Recently the oracle process has begun to consume 100% cpu it is not the particular moment where it happens.
This is why I need a tool to check the particular thread in oracle.exe process consuming more cpu which would help find most cpu of your session in the oracle database.
Thank you

Hello

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         107     2     GVR     7/23/2009           N             2
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                   ORDER BY R.DATE_SUBMITTED DESC,
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    Problem here is
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    An other problem is
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    Thanks for reading this post.

    Published by: user5495111 on July 23, 2009 13:37

    OK then, this query matches your output (with the exception of the rank column)

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    ----------- -------- ---------- ----------------- ---------- ----
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    108         1        GD         23-JUL-2009       Y          3
    103         1        GD         23-JUL-2009       Y          4
    104         1        GD         23-JUL-2009       N          5
    107         2        GVR        23-JUL-2009       N          2   
    
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