vm.swapcache.data_enable=1; curburst=1000000; accrate=100000:
t0: 1000000
t10-normal: 1940000
accrate=-100000 set
t10-negative: 940000
t20-negative: -60000
restored (accrate=100000, data_enable=0, curburst=4000000000)
(4GB swap partition active: /dev/vbd0s1b)