funcgraph does not output anything

brendangregg / perf-tools

Performance analysis tools based on Linux perf_events (aka perf) and ftrace

GNU General Public License v2.0

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funcgraph does not output anything #112

Open BilyZ98 opened 2 years ago

BilyZ98 commented 2 years ago

I am using CentOS 7.9 with 3.10 Linux kernel version. I am trying to use funcgraph to record the duration of the kernel function. But I can't see any output from the funcgraph . How can I fix this ?