Multiple Sequential Reader vs Multiple Sequential Reader
===============================================
Vanilla CFQ
-----------------------------------
[Multiple Sequential Reader]        [Multiple Sequential Reader]        
nr  Agg-bandw Max-latency Agg-iops  nr  Agg-bandw Max-latency Agg-iops  
16  13705KB/s 2573K usec  3419      1   714KB/s   1619K usec  178       
16  12372KB/s 2110K usec  3087      2   1507KB/s  1890K usec  376       
16  11156KB/s 1924K usec  2781      4   2276KB/s  1924K usec  567       
16  9351KB/s  2368K usec  2330      8   4136KB/s  2367K usec  1031      
16  6739KB/s  3168K usec  1677      16  6626KB/s  3169K usec  1649      

IO scheduler controller + CFQ
-----------------------------------
[Multiple Sequential Reader]        [Multiple Sequential Reader]        
nr  Agg-bandw Max-latency Agg-iops  nr  Agg-bandw Max-latency Agg-iops  
16  7003KB/s  3415K usec  1742      1   5826KB/s  427K usec   1456      
16  6892KB/s  3245K usec  1715      2   6553KB/s  334K usec   1637      
16  6939KB/s  3457K usec  1728      4   6556KB/s  1013K usec  1638      
16  6808KB/s  3148K usec  1693      8   6591KB/s  1648K usec  1644      
16  6717KB/s  3132K usec  1672      16  6481KB/s  3132K usec  1613      

dm-ioaband + CFQ
-----------------------------------
[Multiple Sequential Reader]        [Multiple Sequential Reader]        
nr  Agg-bandw Max-latency Agg-iops  nr  Agg-bandw Max-latency Agg-iops  
16  11020KB/s 1468K usec  2748      1   1749KB/s  1438K usec  437       
16  9110KB/s  1456K usec  2270      2   3709KB/s  1330K usec  927       
16  8162KB/s  1751K usec  2033      4   4941KB/s  1717K usec  1233      
16  8367KB/s  2098K usec  2084      8   5485KB/s  2095K usec  1366      
16  7197KB/s  2851K usec  1790      16  6446KB/s  2795K usec  1604