Re: [PATCH] kselftests: ftrace: limit the executing time by reading from cached trace

On Wed, 20 Oct 2021 11:55:22 +0900 Masami Hiramatsu mhiramat@kernel.org wrote:

--- a/tools/testing/selftests/ftrace/test.d/functions +++ b/tools/testing/selftests/ftrace/test.d/functions @@ -124,6 +124,12 @@ initialize_ftrace() { # Reset ftrace to initial-state [ -f uprobe_events ] && echo > uprobe_events [ -f synthetic_events ] && echo > synthetic_events [ -f snapshot ] && echo 0 > snapshot

+# Stop tracing while reading the trace file by default, to prevent +# the test results while checking it and to avoid taking a long time +# to check the result.

• [ -f options/pause-on-trace ] && echo 1 > options/pause-on-trace

Is there a way we can save the previous setting and put it back on reset?

-- Steve