The keys of the %tids hash are the individual thread ids.
So add the following after building the hash in your loop 
$tidc=(keys %tidc);
print "Number of unique threads referenced is: $tidc\n";

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(keys %tids) is an array of the keys of the hash, assigning an array to a scalar sets it to the number items in the array

In reply to Re^5: thread count by Utilitarian
in thread thread count by namishtiwari

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