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From: Hao Xu <hao.xu@linux.dev>
To: io-uring@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>,
	Pavel Begunkov <asml.silence@gmail.com>,
	linux-fsdevel@vger.kernel.org,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Luis Chamberlain <mcgrof@kernel.org>,
	Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Subject: Re: [RFC 0/5] support nonblock submission for splice pipe to pipe
Date: Tue, 14 Jun 2022 21:23:07 +0800	[thread overview]
Message-ID: <5964648e-c192-5d31-4373-eeb1400c1855@linux.dev> (raw)
In-Reply-To: <20220607080619.513187-1-hao.xu@linux.dev>

On 6/7/22 16:06, Hao Xu wrote:
> From: Hao Xu <howeyxu@tencent.com>
> 
> splice from pipe to pipe is a trivial case, and we can support nonblock
> try for it easily. splice depends on iowq at all which is slow. Let's
> build a fast submission path for it by supporting nonblock.
> 
> Wrote a simple test to test time spent of splicing from pipe to pipe:
> 
> 
> Did 50 times test for each, ignore the highest and lowest number,
> calculate the average number:
> 
> before patchset: 119.85 usec
> with patchset: 29.5 usec
> 

Hi Al,
Any comments on this one?

Regards,
Hao


      parent reply	other threads:[~2022-06-14 13:23 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-07  8:06 [RFC 0/5] support nonblock submission for splice pipe to pipe Hao Xu
2022-06-07  8:06 ` [PATCH 1/5] io_uring: move sp->len check up for splice and tee Hao Xu
2022-06-07  8:06 ` [PATCH 2/5] pipe: add trylock helpers for pipe lock Hao Xu
2022-06-07  8:06 ` [PATCH 3/5] splice: support nonblock for splice from pipe to pipe Hao Xu
2022-06-07  8:06 ` [PATCH 4/5] io_uring: support nonblock try for splicing " Hao Xu
2022-06-07 21:38   ` kernel test robot
2022-06-08 14:18   ` kernel test robot
2022-06-09  2:24   ` kernel test robot
2022-06-07  8:06 ` [PATCH 5/5] io_uring: add file_in in io_splice{} to avoid duplicate calculation Hao Xu
2022-06-07  8:13 ` [RFC 0/5] support nonblock submission for splice pipe to pipe Hao Xu
2022-06-07  9:27 ` Pavel Begunkov
2022-06-08  4:19   ` Hao Xu
2022-06-08  4:31     ` Jens Axboe
2022-06-08 11:33     ` Pavel Begunkov
2022-06-14 13:23 ` Hao Xu [this message]

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