in cluster-trace-gpu-v2020/simulator/node.py [0:0]
def alloc_gpus(self, num_gpus=0):
'''
If enough free gpus, allocate gpus
Return: True, for success;
False, for failure
'''
if num_gpus > self.idl_gpus:
return False
else:
self.idl_gpus -= num_gpus
return True