Re: [PATCH v7 09/16] tracing: Add hist trigger snapshot() action test case
From: Masami Hiramatsu <mhiramat@kernel.org>
Date: 2018-11-28 02:16:09
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From: Masami Hiramatsu <mhiramat@kernel.org>
Date: 2018-11-28 02:16:09
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Hi Tom, On Tue, 27 Nov 2018 16:53:45 -0600 Tom Zanussi [off-list ref] wrote:
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+ping $LOCALHOST -c 3 +nice -n 1 ping $LOCALHOST -c 3 + +echo 0 > /sys/kernel/debug/tracing/events/sched/enableShouldn't we stop tracing instead of disabling the event?This is just reversing the enable, so should be fine, but I can stop tracing instead if you prefer.
Oops, maybe we have to check the difference between event enabling and trace enabling. echo 0 > tracing_on will stop writing ring buffer, but event may continue to be called. Does this mean hist will be updated? (and I guess preferrable behavior is to stop hist too, isn't it?) Thank you, -- Masami Hiramatsu [off-list ref]