1 Demonstrations of vfscount, the Linux eBPF/bcc version. 2 3 4 This counts VFS calls, by tracing all kernel functions beginning with "vfs_": 5 6 # ./vfscount 7 Tracing... Ctrl-C to end. 8 ^C 9 ADDR FUNC COUNT 10 ffffffff811f3c01 vfs_create 1 11 ffffffff8120be71 vfs_getxattr 2 12 ffffffff811f5f61 vfs_unlink 2 13 ffffffff81236ca1 vfs_lock_file 6 14 ffffffff81218fb1 vfs_fsync_range 6 15 ffffffff811ecaf1 vfs_fstat 319 16 ffffffff811e6f01 vfs_open 475 17 ffffffff811ecb51 vfs_fstatat 488 18 ffffffff811ecac1 vfs_getattr 704 19 ffffffff811ec9f1 vfs_getattr_nosec 704 20 ffffffff811e80a1 vfs_write 1764 21 ffffffff811e7f71 vfs_read 2283 22 23 This can be useful for workload characterization, to see what types of 24 operations are in use. 25 26 You can edit the script to customize what kernel functions are matched. 27
