From: Christoph Hellwig <hch@infradead.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org
Subject: Re: [PATCH 4/4] nvme: add support for mq_ops->queue_rqs()
Date: Sun, 5 Dec 2021 23:40:30 -0800 [thread overview]
Message-ID: <Ya2+buqfKSFHWVvu@infradead.org> (raw)
In-Reply-To: <20211203214544.343460-5-axboe@kernel.dk>
On Fri, Dec 03, 2021 at 02:45:44PM -0700, Jens Axboe wrote:
> This enables the block layer to send us a full plug list of requests
> that need submitting. The block layer guarantees that they all belong
> to the same queue, but we do have to check the hardware queue mapping
> for each request.
>
> If errors are encountered, leave them in the passed in list. Then the
> block layer will handle them individually.
>
> This is good for about a 4% improvement in peak performance, taking us
> from 9.6M to 10M IOPS/core.
This looks pretty similar to my proposed cleanups (which is nice), but
back then you mentioned the cleaner version was much slower. Do you
know what brought the speed back in this version?
next prev parent reply other threads:[~2021-12-06 7:40 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-03 21:45 [PATCHSET v2 0/4] Add support for list issue Jens Axboe
2021-12-03 21:45 ` [PATCH 1/4] block: add mq_ops->queue_rqs hook Jens Axboe
2021-12-04 10:43 ` Hannes Reinecke
2021-12-04 20:13 ` Jens Axboe
2021-12-05 9:07 ` Hannes Reinecke
2021-12-05 13:09 ` Jens Axboe
2021-12-03 21:45 ` [PATCH 2/4] nvme: split command copy into a helper Jens Axboe
2021-12-04 10:44 ` Hannes Reinecke
2021-12-06 7:38 ` Christoph Hellwig
2021-12-06 16:33 ` Jens Axboe
2021-12-03 21:45 ` [PATCH 3/4] nvme: separate command prep and issue Jens Axboe
2021-12-04 10:45 ` Hannes Reinecke
2021-12-03 21:45 ` [PATCH 4/4] nvme: add support for mq_ops->queue_rqs() Jens Axboe
2021-12-04 10:47 ` Hannes Reinecke
2021-12-06 7:40 ` Christoph Hellwig [this message]
2021-12-06 16:33 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2021-12-15 16:24 [PATCHSET v3 0/4] Add support for list issue Jens Axboe
2021-12-15 16:24 ` [PATCH 4/4] nvme: add support for mq_ops->queue_rqs() Jens Axboe
2021-12-15 17:29 ` Keith Busch
2021-12-15 20:27 ` Jens Axboe
2021-12-16 9:08 ` Christoph Hellwig
2021-12-16 13:06 ` Max Gurtovoy
2021-12-16 15:48 ` Jens Axboe
2021-12-16 16:00 ` Max Gurtovoy
2021-12-16 16:05 ` Jens Axboe
2021-12-16 16:19 ` Max Gurtovoy
2021-12-16 16:25 ` Jens Axboe
2021-12-16 16:34 ` Max Gurtovoy
2021-12-16 16:36 ` Jens Axboe
2021-12-16 16:57 ` Max Gurtovoy
2021-12-16 17:16 ` Jens Axboe
2021-12-19 12:14 ` Max Gurtovoy
2021-12-19 14:48 ` Jens Axboe
2021-12-20 10:11 ` Max Gurtovoy
2021-12-20 14:19 ` Jens Axboe
2021-12-20 14:25 ` Jens Axboe
2021-12-20 15:29 ` Max Gurtovoy
2021-12-20 16:34 ` Jens Axboe
2021-12-20 18:48 ` Max Gurtovoy
2021-12-20 18:58 ` Jens Axboe
2021-12-21 10:20 ` Max Gurtovoy
2021-12-21 15:23 ` Jens Axboe
2021-12-21 15:29 ` Max Gurtovoy
2021-12-21 15:33 ` Jens Axboe
2021-12-21 16:08 ` Max Gurtovoy
2021-12-16 15:45 ` Jens Axboe
2021-12-16 16:15 ` Christoph Hellwig
2021-12-16 16:27 ` Jens Axboe
2021-12-16 16:30 ` Christoph Hellwig
2021-12-16 16:36 ` Jens Axboe
2021-12-16 13:02 ` Max Gurtovoy
2021-12-16 15:59 ` Jens Axboe
2021-12-16 16:06 ` Max Gurtovoy
2021-12-16 16:09 ` Jens Axboe
2021-12-16 16:05 [PATCHSET v4 0/4] Add support for list issue Jens Axboe
2021-12-16 16:05 ` [PATCH 4/4] nvme: add support for mq_ops->queue_rqs() Jens Axboe
2021-12-16 16:38 [PATCHSET v5 0/4] Add support for list issue Jens Axboe
2021-12-16 16:39 ` [PATCH 4/4] nvme: add support for mq_ops->queue_rqs() Jens Axboe
2021-12-16 17:53 ` Christoph Hellwig
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