netdev - Re: [RFC PATCH v3 0/3] io_uring: add napi busy polling support

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Message-ID: <20221116103117.6b82e982@kernel.org>
Date:   Wed, 16 Nov 2022 10:31:17 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Stefan Roesch <shr@...kernel.io>
Cc:     kernel-team@...com, axboe@...nel.dk, olivier@...llion01.com,
        netdev@...r.kernel.org, io-uring@...r.kernel.org
Subject: Re: [RFC PATCH v3 0/3] io_uring: add napi busy polling support

On Mon, 14 Nov 2022 23:08:57 -0800 Stefan Roesch wrote:
> This adds the napi busy polling support in io_uring.c. It adds a new
> napi_list to the io_ring_ctx structure. This list contains the list of
> napi_id's that are currently enabled for busy polling. This list is
> used to determine which napi id's enabled busy polling.
> 
> To set the new napi busy poll timeout, a new io-uring api has been
> added. It sets the napi busy poll timeout for the corresponding ring.
> 
> There is also a corresponding liburing patch series, which enables this
> feature. The name of the series is "liburing: add add api for napi busy
> poll timeout". It also contains two programs to test the this.
> 
> Testing has shown that the round-trip times are reduced to 38us from
> 55us by enabling napi busy polling with a busy poll timeout of 100us.

Acked-by: Jakub Kicinski <kuba@...nel.org>

Thanks!