shmsnoop(8)

NAME
shmsnoop - Trace System V shared memory syscalls. Uses Linux eBPF/bcc.

SYNOPSIS
shmsnoop [-h] [-T] [-p] [-t] [-d DURATION] [-n NAME]

DESCRIPTION
shmsnoop traces System V shared memory syscalls: shmget, shmat, shmdt, shmctl Since this uses BPF, only the root user can use this tool.

REQUIREMENTS
CONFIG_BPF and bcc.

OPTIONS

-h  Print usage message.

-T  Include a timestamp column.

-p PID
    Trace this process ID only (filtered in-kernel).

-t TID
    Trace this thread ID only (filtered in-kernel).

-d DURATION
    Total duration of trace in seconds.

-n NAME
    Only print command lines matching this command name (regex)

EXAMPLES

Trace all shm* syscalls:
    # shmsnoop

Trace all shm* syscalls, and include timestamps:
    # shmsnoop -T

Only trace shm* syscalls where the process contains "server":
    # shmsnoop -n server

FIELDS

TIME(s)
    Time of shm syscall return, in seconds.

PID Process ID

COMM
    Parent process/command name.

RET Return value of shm syscall.

ARGS
    "arg: value" couples that represent given syscall arguments as described in their manpage

SOURCE
This is from bcc.

    https://github.com/iovisor/bcc

Also look in the bcc distribution for a companion _examples.txt file containing example usage, output, and commentary for this tool.

OS
Linux

STABILITY
Unstable - in development.

AUTHOR
Jiri Olsa

SEE ALSO
opensnoop(1)