oomkill - Trace oom_kill_process(). Uses Linux eBPF/bcc.
This traces the kernel out-of-memory killer, and prints basic details, including
the system load averages at the time of the OOM kill. This can provide more
context on the system state at the time: was it getting busier or steady,
based on the load averages? This tool may also be useful to customize for
investigations; for example, by adding other task_struct details at the time
This program is also a basic example of eBPF/bcc.
Since this uses BPF, only the root user can use this tool.
CONFIG_BPF and bcc.
- Trace OOM kill events:
- # oomkill
- Triggered by ...
- The process ID and process name of the task that was
running when another task was OOM killed.
- OOM kill of ...
- The process ID and name of the target process that was OOM
- Contents of /proc/loadavg. The first three numbers are 1,
5, and 15 minute load averages (where the average is an exponentially
damped moving sum, and those numbers are constants in the equation); then
there is the number of running tasks, a slash, and the total number of
tasks; and then the last number is the last PID to be created.
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.