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From: Jens Axboe <[email protected]>
To: Kanchan Joshi <[email protected]>, [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [PATCH for-next v8 0/5] fixed-buffer for uring-cmd/passthru
Date: Fri, 23 Sep 2022 08:15:28 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 9/23/22 3:28 AM, Kanchan Joshi wrote:
> Currently uring-cmd lacks the ability to leverage the pre-registered
> buffers. This series adds that support in uring-cmd, and plumbs
> nvme passthrough to work with it.
> 
> Using registered-buffers showed IOPS hike from 1.9M to 2.2M in my tests.

Ran my peak test on this, specifically:

t/io_uring -pX -d128 -b512 -s32 -c32 -F1 -B0 -R1 -X1 -n24 -P1 -u1 -O0 /dev/ng0n1 /dev/ng1n1 /dev/ng2n1 /dev/ng3n1 /dev/ng4n1 /dev/ng5n1 /dev/ng6n1 /dev/ng7n1 /dev/ng8n1 /dev/ng9n1 /dev/ng10n1 /dev/ng11n1 /dev/ng12n1 /dev/ng13n1 /dev/ng14n1 /dev/ng15n1 /dev/ng16n1 /dev/ng17n1 /dev/ng18n1 /dev/ng19n1 /dev/ng20n1 /dev/ng21n1 /dev/ng22n1 /dev/ng23n1

Before:

Polled (-p1): 96.8M IOPS
IRQ driven (-p0): 56.2M IOPS

With patches, set -B1 in the above:

Polled (-p1): 121.8M IOPS
IRQ driven (-p0): 68.7M IOPS

+22-26% improvement, which is not unexpected.

-- 
Jens Axboe



  parent reply	other threads:[~2022-09-23 14:15 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220923093906epcas5p1308a262f3de722a923339c2e804fc5ee@epcas5p1.samsung.com>
2022-09-23  9:28 ` [PATCH for-next v8 0/5] fixed-buffer for uring-cmd/passthru Kanchan Joshi
     [not found]   ` <CGME20220923093910epcas5p2624d93c6cb5caebb5f9203a1b8f4f5b1@epcas5p2.samsung.com>
2022-09-23  9:28     ` [PATCH for-next v8 1/5] io_uring: add io_uring_cmd_import_fixed Kanchan Joshi
     [not found]   ` <CGME20220923093913epcas5p4d91766a750d6f5e87a1da0b92f6c4a2e@epcas5p4.samsung.com>
2022-09-23  9:28     ` [PATCH for-next v8 2/5] io_uring: introduce fixed buffer support for io_uring_cmd Kanchan Joshi
     [not found]   ` <CGME20220923093916epcas5p387fdd905413f6d90babecf5d14da5b67@epcas5p3.samsung.com>
2022-09-23  9:28     ` [PATCH for-next v8 3/5] nvme: refactor nvme_alloc_user_request Kanchan Joshi
2022-09-23 15:38       ` Christoph Hellwig
2022-09-25 17:39         ` Kanchan Joshi
2022-09-25 19:43         ` Kanchan Joshi
2022-09-26 14:51           ` Christoph Hellwig
2022-09-27 16:57             ` Kanchan Joshi
     [not found]   ` <CGME20220923093919epcas5p3d019fa1db990101478b8d6673ac0eaa6@epcas5p3.samsung.com>
2022-09-23  9:28     ` [PATCH for-next v8 4/5] block: add helper to map bvec iterator for passthrough Kanchan Joshi
2022-09-23 15:30       ` Christoph Hellwig
     [not found]   ` <CGME20220923093924epcas5p1e1723a3937cb3331c77e55bd1a785e57@epcas5p1.samsung.com>
2022-09-23  9:28     ` [PATCH for-next v8 5/5] nvme: wire up fixed buffer support for nvme passthrough Kanchan Joshi
2022-09-23 15:40       ` Christoph Hellwig
2022-09-23 14:15   ` Jens Axboe [this message]
2022-09-25 17:56     ` [PATCH for-next v8 0/5] fixed-buffer for uring-cmd/passthru Kanchan Joshi

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