bcc-shmsnoop man page
shmsnoop — Trace System V shared memory syscalls. Uses Linux eBPF/bcc.
shmsnoop [-h] [-T] [-p] [-t] [-d DURATION] [-n NAME]
shmsnoop traces System V shared memory syscalls: shmget, shmat, shmdt, shmctl
Since this uses BPF, only the root user can use this tool.
CONFIG_BPF and bcc.
Print usage message.
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)
- Trace all shm* syscalls:
- Trace all shm* syscalls, and include timestamps:
# shmsnoop -T
- Only trace shm* syscalls where the process contains "server":
# shmsnoop -n server
Time of shm syscall return, in seconds.
Parent process/command name.
Return value of shm syscall.
"arg: value" couples that represent given syscall arguments as described in their manpage
This is from bcc.
Also look in the bcc distribution for a companion _examples.txt file containing example usage, output, and commentary for this tool.
Unstable - in development.