1 Demonstrations of vfsstat, the Linux eBPF/bcc version. 2 3 4 This traces some common VFS calls and prints per-second summaries. By default, 5 the output interval is one second: 6 7 # ./vfsstat 8 TIME READ/s WRITE/s CREATE/s OPEN/s FSYNC/s 9 18:35:32: 231 12 4 98 0 10 18:35:33: 274 13 4 106 0 11 18:35:34: 586 86 4 251 0 12 18:35:35: 241 15 4 99 0 13 18:35:36: 232 10 4 98 0 14 18:35:37: 244 10 4 107 0 15 18:35:38: 235 13 4 97 0 16 18:35:39: 6749 2633 4 1446 0 17 18:35:40: 277 31 4 115 0 18 18:35:41: 238 16 6 102 0 19 18:35:42: 284 50 8 114 0 20 ^C 21 22 23 Here we are using an output interval of five seconds, and printing three output 24 lines: 25 26 # ./vfsstat 5 3 27 TIME READ/s WRITE/s CREATE/s OPEN/s FSYNC/s 28 18:35:55: 238 8 3 101 0 29 18:36:00: 962 233 4 247 0 30 18:36:05: 241 8 3 100 0 31 32 33 Full usage: 34 35 # ./vfsstat -h 36 USAGE: ./vfsstat [interval [count]] 37
