p1 "File ID",
p2 "Block ID",
p3 "Reason ID"
event = 'buffer busy waits';
Now, you can find file id and block id of buffer busy. Using the following statement you can find the object belonging to waits:
file_id = &P1
&P2 between block_id and block_id + blocks -1;
Now you have to find which session is using the object incriminated.