Re: Emulate Rpi with QEMU fails

[Alex Bennée]

Thomas Schneider <74cmonty@gmail.com> writes:

> Are you referring to this tool?
> https://github.com/stefano-garzarella/qemu-boot-time 
> <https://github.com/stefano-garzarella/qemu-boot-time>

No - just plain perf:

  perf record $QEMU $ARGS

Then a "perf report" which will show you the hotspots, for example:

   8.92%  qemu-system-aar  qemu-system-aarch64      [.] helper_lookup_tb_ptr
   4.76%  qemu-system-aar  qemu-system-aarch64      [.] liveness_pass_1
   3.69%  qemu-system-aar  qemu-system-aarch64      [.] tcg_gen_code
   2.95%  qemu-system-aar  qemu-system-aarch64      [.] qht_lookup_custom
   2.93%  qemu-system-aar  qemu-system-aarch64      [.] tcg_optimize
   1.28%  qemu-system-aar  qemu-system-aarch64      [.] tcg_out_opc.isra.15
   1.09%  qemu-system-aar  qemu-system-aarch64      [.] get_phys_addr_lpae
   1.09%  qemu-system-aar  [kernel.kallsyms]        [k] isolate_freepages_block
   1.05%  qemu-system-aar  qemu-system-aarch64      [.] cpu_get_tb_cpu_state
   0.98%  qemu-system-aar  [kernel.kallsyms]        [k] do_syscall_64
   0.94%  qemu-system-aar  qemu-system-aarch64      [.] tb_lookup_cmp
   0.78%  qemu-system-aar  qemu-system-aarch64      [.] init_ts_info
   0.73%  qemu-system-aar  qemu-system-aarch64      [.] tb_htable_lookup
   0.73%  qemu-system-aar  qemu-system-aarch64      [.] tb_gen_code
   0.73%  qemu-system-aar  qemu-system-aarch64      [.] tlb_set_page_with_attrs

>
>
> Am 07.10.2020 um 13:00 schrieb Alex Bennée:
>> perf to record your boot


-- 
Alex Bennée