From: Jens Axboe <axboe@kernel.dk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 2/4] fs: add support for LOOKUP_NONBLOCK
Date: Tue, 15 Dec 2020 12:03:01 -0700 [thread overview]
Message-ID: <5e9f9121-68dd-81a1-38b7-8e1b4fd0cf0f@kernel.dk> (raw)
In-Reply-To: <CAHk-=wgyKDvLhiKfQ1xvBxFkD_+v_SCmMeJvzNJ_maibWH6QRQ@mail.gmail.com>
On 12/15/20 11:47 AM, Linus Torvalds wrote:
> On Tue, Dec 15, 2020 at 10:44 AM Jens Axboe <axboe@kernel.dk> wrote:
>>
>> In usecs again, same test, this time just using io_uring:
>>
>> Cached 5.10-git 5.10-git+LOOKUP_NONBLOCK
>> --------------------------------------------------------
>> 33% 1,014,975 900,474
>> 100% 435,636 151,475
>
> Ok, that's quite convincing. Thanks,
Just for completeness, here's 89% (tool is pretty basic, closest I can
get to 90%):
Cached 5.10-git 5.10-git+LOOKUP_NONBLOCK
--------------------------------------------------------
89% 545,466 292,937
which is about an 1.8x win, where 100% is a 2.8x win.
And for comparison, doing the same thing with the regular openat2()
system call takes 867,897 usec.
--
Jens Axboe
next prev parent reply other threads:[~2020-12-15 19:04 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-14 19:13 [PATCHSET v3 0/4] fs: Support for LOOKUP_NONBLOCK / RESOLVE_NONBLOCK Jens Axboe
2020-12-14 19:13 ` [PATCH 1/4] fs: make unlazy_walk() error handling consistent Jens Axboe
2020-12-14 19:13 ` [PATCH 2/4] fs: add support for LOOKUP_NONBLOCK Jens Axboe
2020-12-15 12:24 ` Matthew Wilcox
2020-12-15 15:29 ` Jens Axboe
2020-12-15 15:33 ` Matthew Wilcox
2020-12-15 15:37 ` Jens Axboe
2020-12-15 16:08 ` Jens Axboe
2020-12-15 16:14 ` Jens Axboe
2020-12-15 18:29 ` Linus Torvalds
2020-12-15 18:44 ` Jens Axboe
2020-12-15 18:47 ` Linus Torvalds
2020-12-15 19:03 ` Jens Axboe [this message]
2020-12-15 19:32 ` Linus Torvalds
2020-12-15 19:38 ` Jens Axboe
2020-12-16 2:36 ` Al Viro
2020-12-16 3:30 ` Jens Axboe
2020-12-16 2:43 ` Al Viro
2020-12-16 3:32 ` Jens Axboe
2020-12-14 19:13 ` [PATCH 3/4] fs: expose LOOKUP_NONBLOCK through openat2() RESOLVE_NONBLOCK Jens Axboe
2020-12-15 22:25 ` Dave Chinner
2020-12-15 22:31 ` Linus Torvalds
2020-12-15 23:25 ` Jens Axboe
2020-12-16 2:37 ` Al Viro
2020-12-16 3:39 ` Linus Torvalds
2020-12-14 19:13 ` [PATCH 4/4] io_uring: enable LOOKUP_NONBLOCK path resolution for filename lookups Jens Axboe
2020-12-15 3:06 ` [PATCHSET v3 0/4] fs: Support for LOOKUP_NONBLOCK / RESOLVE_NONBLOCK Linus Torvalds
2020-12-15 3:18 ` Jens Axboe
2020-12-15 6:11 ` Al Viro
2020-12-15 15:29 ` Jens Axboe
2021-01-04 5:31 ` Al Viro
2021-01-04 14:43 ` Jens Axboe
2021-01-04 16:54 ` Al Viro
2021-01-04 17:03 ` Jens Axboe
[not found] ` <m1lfbrwrgq.fsf@fess.ebiederm.org>
2021-02-14 16:38 ` [PATCHSET v3 0/4] fs: Support for LOOKUP_NONBLOCK / RESOLVE_NONBLOCK (Insufficiently faking current?) Jens Axboe
2021-02-14 20:30 ` Linus Torvalds
2021-02-14 21:24 ` Al Viro
2021-02-15 18:07 ` Eric W. Biederman
2021-02-15 18:24 ` Jens Axboe
2021-02-15 21:09 ` Jens Axboe
2021-02-15 22:41 ` Eric W. Biederman
2021-02-16 2:41 ` Jens Axboe
2021-02-17 1:18 ` Jens Axboe
2021-02-17 1:26 ` Jens Axboe
2021-02-17 3:11 ` Jens Axboe
2021-02-15 17:56 ` Eric W. Biederman
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