How to Relate Log file Parallel Write wait events in AWR

Hello

I am seeing the following in AWR for a process taking 13 hours now after a patch which should be 30 Min normally earlier.

Any body can help urgently to tell me what should be next steps to investigate ?

Background Wait Events

• ordered by wait time desc, waits desc (idle events last) 
• Only events with Total Wait Time (s) >= .001 are shown 
• %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0

Event	Waits	%Time -outs	Total Wait Time (s)	Avg wait (ms)	Waits /txn	% bg time
log file parallel write	6,422,976	0	12,314	2	0.63	49.96
gcs log flush sync	484,425	6	1,181	2	0.05	4.79
db file parallel write	298,015	0	963	3	0.03	3.91
log file sequential read