Syscall trace via perf perf

strace-like syscall trace with -s summary; lower overhead, no ptrace stop-the-world

perf trace -s -p <pid>

#perf #debug #performance #troubleshooting

more perf all 17 commands →

Dynamic probe on function perf probe --add 'tcp_sendmsg size' && perf record -e probe:tcp_sendmsg -a -- sleep 5 Record CPU cycles perf record -g ./my_app Show perf report perf report List available events perf list Stat command perf stat ls -la