December 2020
Intermediate to advanced
928 pages
28h 18m
English
Content preview from Systems Performance, 2nd Edition
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Appendix C
bpftrace One-Liners
This appendix contains some handy bpftrace one-liners. Apart from being useful in themselves, they can help you learn bpftrace, one line at a time. Most of these were included in previous chapters. Many may not work right away: They may depend on the presence of certain tracepoints or functions, or on a specific kernel version or configuration.
See Chapter 15, Section 15.2, for an introduction to bpftrace.
CPUs
Trace new processes with arguments:
bpftrace -e 'tracepoint:syscalls:sys_enter_execve { join(args->argv); }'
Count syscalls by process:
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[pid, comm] = count(); }'
Count syscalls by syscall probe ...
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