Messages in this thread | | | Date | Thu, 3 Oct 2019 14:52:30 +0900 | From | Masami Hiramatsu <> | Subject | Re: [PATCH 3/3] x86/ftrace: Use text_poke() |
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On Wed, 2 Oct 2019 18:35:26 +0200 Daniel Bristot de Oliveira <bristot@redhat.com> wrote:
> ftrace was already batching the updates, for instance, causing 3 IPIs to enable > all functions. The text_poke() batching also works. But because of the limited > buffer [ see the reply to the patch 2/3 ], it is flushing the buffer during the > operation, causing more IPIs than the previous code. Using the 5.4-rc1 in a VM, > when enabling the function tracer, I see 250+ intermediate text_poke_finish() > because of a full buffer...
Would you have any performance numbers of the previous code and applying this?
Thank you,
-- Masami Hiramatsu <mhiramat@kernel.org>
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