def multi_zdotu(s, x, y, nvec):
for i in range(nvec):
s[i] = dotu(x[i], y[i])
wfs.gd.comm.sum(s)
return s
def multi_zdotu(s, x,y, nvec):
for i in range(nvec):
s[i] = dotu(x[i],y[i])
wfs.gd.comm.sum(s)
return s