bcc-shmsnoop(8)

1shmsnoop(8)                 System Manager's Manual                shmsnoop(8)
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NAME

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

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

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

18       CONFIG_BPF and bcc.
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OPTIONS

21       -h     Print usage message.
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23       -T     Include a timestamp column.
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25       -p PID Trace this process ID only (filtered in-kernel).
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27       -t TID Trace this thread ID only (filtered in-kernel).
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29       -d DURATION
30              Total duration of trace in seconds.
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32       -n NAME
33              Only print command lines matching this command name (regex)
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EXAMPLES

36       Trace all shm* syscalls:
37              # shmsnoop
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39       Trace all shm* syscalls, and include timestamps:
40              # shmsnoop -T
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42       Only trace shm* syscalls where the process contains "server":
43              # shmsnoop -n server
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FIELDS

46       TIME(s)
47              Time of shm syscall return, in seconds.
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49       PID    Process ID
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51       COMM   Process/command name.
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53       RET    Return value of shm syscall.
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55       ARGS   "arg: value" couples that represent given syscall  arguments  as
56              described in their manpage
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SOURCE

59       This is from bcc.
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61              https://github.com/iovisor/bcc
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63       Also  look  in  the bcc distribution for a companion _examples.txt file
64       containing example usage, output, and commentary for this tool.
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OS

67       Linux
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STABILITY

70       Unstable - in development.
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AUTHOR

73       Jiri Olsa
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