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Linux jobworks 6.8.0-136-generic #136-Ubuntu SMP PREEMPT_DYNAMIC Wed Jul 1 21:53:05 UTC 2026 x86_64
Apache/2.4.58 (Ubuntu)
Server IP : 10.0.1.5 & Your IP : 216.73.217.52
Domains : Cant Read [ /etc/named.conf ]
User : www-data

Name	Size	Permission	Date
bashreadline_example.txt	722 B	-rw-r--r--	2024-03-07 22:14
biolatency_example.txt	1.75 KB	-rw-r--r--	2024-03-07 22:14
biosnoop_example.txt	2.01 KB	-rw-r--r--	2024-03-07 22:14
biostacks_example.txt	1.87 KB	-rw-r--r--	2024-03-07 22:14
bitesize_example.txt	2.93 KB	-rw-r--r--	2024-03-07 22:14
capable_example.txt	2.6 KB	-rw-r--r--	2024-03-07 22:14
cpuwalk_example.txt	4.8 KB	-rw-r--r--	2024-03-07 22:14
dcsnoop_example.txt	4.5 KB	-rw-r--r--	2024-03-07 22:14
execsnoop_example.txt	1.5 KB	-rw-r--r--	2024-03-07 22:14
gethostlatency_example.txt	923 B	-rw-r--r--	2024-03-07 22:14
killsnoop_example.txt	846 B	-rw-r--r--	2024-03-07 22:14
loads_example.txt	864 B	-rw-r--r--	2024-03-07 22:14
mdflush_example.txt	1.82 KB	-rw-r--r--	2024-03-07 22:14
naptime_example.txt	844 B	-rw-r--r--	2024-03-07 22:14
oomkill_example.txt	1.63 KB	-rw-r--r--	2024-03-07 22:14
opensnoop_example.txt	2.47 KB	-rw-r--r--	2024-03-07 22:14
pidpersec_example.txt	1.47 KB	-rw-r--r--	2024-03-07 22:14
runqlat_example.txt	8.43 KB	-rw-r--r--	2024-03-07 22:14
runqlen_example.txt	980 B	-rw-r--r--	2024-03-07 22:14
setuids_example.txt	2.38 KB	-rw-r--r--	2024-03-07 22:14
ssllatency_example.txt	4.4 KB	-rw-r--r--	2024-03-07 22:14
sslsnoop_example.txt	1.87 KB	-rw-r--r--	2024-03-07 22:14
statsnoop_example.txt	2.67 KB	-rw-r--r--	2024-03-07 22:14
swapin_example.txt	549 B	-rw-r--r--	2024-03-07 22:14
syncsnoop_example.txt	541 B	-rw-r--r--	2024-03-07 22:14
syscount_example.txt	1.12 KB	-rw-r--r--	2024-03-07 22:14
tcpaccept_example.txt	1.32 KB	-rw-r--r--	2024-03-07 22:14
tcpconnect_example.txt	1.06 KB	-rw-r--r--	2024-03-07 22:14
tcpdrop_example.txt	1.23 KB	-rw-r--r--	2024-03-07 22:14
tcplife_example.txt	1.56 KB	-rw-r--r--	2024-03-07 22:14
tcpretrans_example.txt	1.13 KB	-rw-r--r--	2024-03-07 22:14
tcpsynbl_example.txt	940 B	-rw-r--r--	2024-03-07 22:14
threadsnoop_example.txt	1.15 KB	-rw-r--r--	2024-03-07 22:14
undump_example.txt	680 B	-rw-r--r--	2024-03-07 22:14
vfscount_example.txt	1.17 KB	-rw-r--r--	2024-03-07 22:14
vfsstat_example.txt	929 B	-rw-r--r--	2024-03-07 22:14
writeback_example.txt	1.92 KB	-rw-r--r--	2024-03-07 22:14
xfsdist_example.txt	3.34 KB	-rw-r--r--	2024-03-07 22:14

Rename

Demonstrations of vfscount, the Linux bpftrace/eBPF version.

Tracing all VFS calls:

# ./vfscount.bt
Attaching 54 probes...
cannot attach kprobe, Invalid argument
Warning: could not attach probe kprobe:vfs_dedupe_get_page.isra.21, skipping.
Tracing VFS calls... Hit Ctrl-C to end.
^C

@[vfs_fsync_range]: 4
@[vfs_readlink]: 14
@[vfs_statfs]: 56
@[vfs_lock_file]: 60
@[vfs_write]: 276
@[vfs_statx]: 328
@[vfs_statx_fd]: 394
@[vfs_open]: 541
@[vfs_getattr]: 595
@[vfs_getattr_nosec]: 597
@[vfs_read]: 1113

While tracing, the vfs_read() call was the most frequent, occurring 1,113 times.

VFS is the Virtual File System: a kernel abstraction for file systems and other
resources that expose a file system interface. Much of VFS maps directly to the
syscall interface. Tracing VFS calls gives you a high level breakdown of the
kernel workload, and starting points for further investigation.

Note that a warning was printed: "Warning: could not attach probe
kprobe:vfs_dedupe_get_page.isra.21": these are not currently instrumentable by
bpftrace/kprobes, so a warning is printed to let you know that they will be
missed.

There is another version of this tool in bcc: https://github.com/iovisor/bcc