| Demonstrations of vfscount, the Linux eBPF/bcc version. |
| |
| |
| This counts VFS calls during time, by tracing all kernel functions beginning |
| with "vfs_", By defaults, the time is 99999999s |
| # ./vfscount |
| Tracing... Ctrl-C to end. |
| ^C |
| ADDR FUNC COUNT |
| ffffffff811f3c01 vfs_create 1 |
| ffffffff8120be71 vfs_getxattr 2 |
| ffffffff811f5f61 vfs_unlink 2 |
| ffffffff81236ca1 vfs_lock_file 6 |
| ffffffff81218fb1 vfs_fsync_range 6 |
| ffffffff811ecaf1 vfs_fstat 319 |
| ffffffff811e6f01 vfs_open 475 |
| ffffffff811ecb51 vfs_fstatat 488 |
| ffffffff811ecac1 vfs_getattr 704 |
| ffffffff811ec9f1 vfs_getattr_nosec 704 |
| ffffffff811e80a1 vfs_write 1764 |
| ffffffff811e7f71 vfs_read 2283 |
| |
| Here we are using an output in 10 seconds, and printing 10 seconds summaries |
| # ./vfscount 10 |
| Tracing... Ctrl-C to end. |
| |
| ADDR FUNC COUNT |
| ffffffffa1283671 vfs_rename 1 |
| ffffffffa129f471 vfs_setxattr 1 |
| ffffffffa12831c1 vfs_mkdir 1 |
| ffffffffa1282a51 vfs_rmdir 10 |
| ffffffffa1283f31 vfs_unlink 28 |
| ffffffffa1273e61 vfs_writev 53 |
| ffffffffa12ae061 vfs_statfs 55 |
| ffffffffa129e971 vfs_getxattr 138 |
| ffffffffa1288561 vfs_readlink 157 |
| ffffffffa12d6311 vfs_lock_file 223 |
| ffffffffa1274da1 vfs_write 537 |
| ffffffffa12798f1 vfs_statx_fd 2337 |
| ffffffffa1279971 vfs_statx 3064 |
| ffffffffa1271ba1 vfs_open 4334 |
| ffffffffa12798b1 vfs_getattr 4823 |
| ffffffffa1279821 vfs_getattr_nosec 4823 |
| ffffffffa1274af1 vfs_read 9060 |
| |
| |
| This can be useful for workload characterization, to see what types of |
| operations are in use. |
| |
| You can edit the script to customize what kernel functions are matched. |
| |
| Full usage: |
| |
| # ./vfsstat -h |
| USAGE: ./vfsstat [time] |
