shmsnoop(8) System Manager's Manual 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 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)
USER COMMANDS 2018-09-24 shmsnoop(8)
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