coresight perf issue, no samples

Hi All,

I follow this guide to do test on i.MX8MP, https://elinux.org/images/b/b3/Hardware_Assisted_Tracing_on_ARM.pdf

I could see dump with perf report --dump (attached), but when I use perf report --stdio, I met Error: The perf.data data has no samples! # To display the perf.data header info, please use --header/--header-only options. #

The perf I use to dump data is not compiled with CORESIGHT support, but the host perf has been compiled with CORESIGHT support. Do you know what might cause this issue?

Thanks, Peng.