a4fly
I don’t know a great deal about how the Cirrus "performs" when carrying ice - my suspicion would be that relatively low amounts of ice accumulation are going to cause a dramatic loss of performance because of the design of the wings. I would however want to do some reading on what Cirrus operators who have encountered these conditions have to say.
Obviously the first option would always be to extricate oneself from icing conditions without pulling the chute which in most cases should prove possible.
However if I could not get out of cloud and out of freezing conditions and there were any indications of ice accumulation causing the onset of flight control issues personally I would pull the chute.
Icing in an aircraft with no means of removing or preventing it (I appreciate some Cirrius have a wet wing and prop system) is in my book an emergency situation and one where you need to do something about it fast.