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ab4c15feb2
The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing Many tests in the bpf selftest code still refer to this older debugfs path, so let's update them to avoid confusion. Signed-off-by: Ross Zwisler <zwisler@google.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20230313205628.1058720-3-zwisler@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
44 lines
786 B
Bash
Executable file
44 lines
786 B
Bash
Executable file
#!/bin/bash
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if [[ -e /sys/kernel/tracing/trace ]]; then
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TR=/sys/kernel/tracing/
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else
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TR=/sys/kernel/debug/tracing/
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fi
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clear_trace() { # reset trace output
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echo > $TR/trace
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}
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disable_tracing() { # stop trace recording
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echo 0 > $TR/tracing_on
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}
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enable_tracing() { # start trace recording
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echo 1 > $TR/tracing_on
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}
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reset_tracer() { # reset the current tracer
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echo nop > $TR/current_tracer
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}
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disable_tracing
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clear_trace
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echo "" > $TR/set_ftrace_filter
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echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace
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echo "bpf_prog_test*" > $TR/set_graph_function
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echo "" > $TR/set_graph_notrace
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echo function_graph > $TR/current_tracer
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enable_tracing
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./test_progs -t fentry
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./test_progs -t fexit
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disable_tracing
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clear_trace
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reset_tracer
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exit 0
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