# trace-cmd dump --summary --systems -i trace.dat
Tracing meta data in file trace.dat:
[Initial format]
6 [Version]
0 [Little endian]
8 [Bytes in a long]
4096 [Page size, bytes]
[Header info, 205 bytes]
[Header event, 205 bytes]
[Ftrace format, 15 events]
[Events format, 3 systems]
sched 23 [system, events]
irq 5 [system, events]
kvm 70 [system, events]
[Kallsyms, 7144493 bytes]
[Trace printk, 2131 bytes]
[Saved command lines, 157 bytes]
8 [CPUs with tracing data]
[11 options]
[Flyrecord tracing data]