A bunch of quick and dirty scripts
This is tested on my Fedora 22, and I make no guarantees whether I will port to a different flavor or not.
limit.io - wrapper for limiting bandwidth using blkio controller
In this example you can see that sudo password is asked once:
$> ./limit.io 300000 dd if=/dev/zero of=~/dd bs=5M count=1 oflag=direct
[sudo] password for gfigueir:
253:1 300000
253:1 300000
1+0 records in
1+0 records out
5242880 bytes (5.2 MB) copied, 17.4814 s, 300 kB/s
dd will only be throttled if oflag=direct is used.
Since it is a wrapper, you can run it with sudo with no problems:
./limit.io 2000000 sudo sosreport --batch
During sosreport's read part, note that bi is often bellow 2000
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 2 587072 14816 27640 1145460 0 38 2078 50 648 1078 3 1 24 72
0
0 2 587072 15116 27072 1145184 0 0 2053 3 633 649 1 0 21 77
0
0 2 587072 14968 27088 1147048 0 0 2042 202 581 1143 2 1 8 89
0
1 2 587072 16192 27088 1144944 0 0 2040 1 689 1312 2 1 2 94
0
0 2 587072 14912 27092 1146612 0 0 1864 2 493 619 2 1 7 91
0
0 2 587072 17756 27100 1143596 0 0 2047 4 285 555 1 0 46 53
0
0 2 587072 19376 27100 1141976 0 0 2056 0 259 472 0 0 32 67
0
0 2 587072 17652 27100 1143768 0 0 2057 0 226 407 0 0 50 49
0
0 2 587080 16272 27100 1145296 0 0 2060 0 226 398 0 0 46 54
0
0 2 587600 18112 27504 1144092 0 104 1791 105 506 831 5 2 47 46
0
0 2 589128 16684 27568 1124856 0 382 1910 447 682 1235 4 2 37 58
0
0 2 589716 20144 27456 1122392 0 149 2022 158 390 583 1 1 3 94
0
1 2 591792 38516 27472 1080320 0 375 2018 440 381 469 2 2 1 95
0