From: Chaitanya Kulkarni <[email protected]>
To: Jens Axboe <[email protected]>, Christoph Hellwig <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>,
Jason Wang <[email protected]>, Keith Busch <[email protected]>,
Sagi Grimberg <[email protected]>,
Pavel Begunkov <[email protected]>,
"[email protected]" <[email protected]>,
"[email protected]" <[email protected]>,
"[email protected]" <[email protected]>,
"[email protected]" <[email protected]>
Subject: Re: don't reorder requests passed to ->queue_rqs
Date: Wed, 13 Nov 2024 22:23:00 +0000 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 11/13/2024 12:51 PM, Jens Axboe wrote:
>> Looks good to me. I ran the quick performance numbers [1].
>>
>> Reviewed-by: Chaitanya Kulkarni<[email protected]>
>>
>> -ck
>>
>> fio randread iouring workload :-
>>
>> IOPS :-
>> -------
>> nvme-orig: Average IOPS: 72,690
>> nvme-new-no-reorder: Average IOPS: 72,580
>>
>> BW :-
>> -------
>> nvme-orig: Average BW: 283.9 MiB/s
>> nvme-new-no-reorder: Average BW: 283.4 MiB/s
> Thanks for testing, but you can't verify any kind of perf change with
> that kind of setup. I'll be willing to bet that it'll be 1-2% drop at
> higher rates, which is substantial. But the reordering is a problem, not
> just for zoned devices, which is why I chose to merge this.
>
> -- Jens Axboe
Agree with you. My intention was to test it, since it was touching NVMe,
I thought sharing results will help either way with io_uring?
but no intention to stop this patchset and make an argument
against it (if at all) for potential drop :).
-ck
next prev parent reply other threads:[~2024-11-13 22:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-13 15:20 don't reorder requests passed to ->queue_rqs Christoph Hellwig
2024-11-13 15:20 ` [PATCH 1/6] nvme-pci: reverse request order in nvme_queue_rqs Christoph Hellwig
2024-11-13 19:10 ` Keith Busch
2024-11-13 15:20 ` [PATCH 2/6] virtio_blk: reverse request order in virtio_queue_rqs Christoph Hellwig
2024-11-13 19:03 ` Keith Busch
2024-11-13 19:05 ` Jens Axboe
2024-11-13 23:25 ` Michael S. Tsirkin
2024-11-13 15:20 ` [PATCH 3/6] block: remove rq_list_move Christoph Hellwig
2024-11-13 15:20 ` [PATCH 4/6] block: add a rq_list type Christoph Hellwig
2024-11-14 20:11 ` Nathan Chancellor
2024-11-15 9:10 ` Christoph Hellwig
2024-11-15 12:49 ` Jens Axboe
2024-11-15 19:38 ` Jens Axboe
2024-11-16 0:56 ` Nathan Chancellor
2024-11-13 15:20 ` [PATCH 5/6] block: don't reorder requests in blk_add_rq_to_plug Christoph Hellwig
2024-11-13 15:20 ` [PATCH 6/6] block: don't reorder requests in blk_mq_add_to_batch Christoph Hellwig
2024-11-13 18:33 ` don't reorder requests passed to ->queue_rqs Bart Van Assche
2024-11-13 18:39 ` Jens Axboe
2024-11-13 18:46 ` Jens Axboe
2024-11-13 20:36 ` Chaitanya Kulkarni
2024-11-13 20:51 ` Jens Axboe
2024-11-13 22:23 ` Chaitanya Kulkarni [this message]
2024-11-13 22:27 ` Jens Axboe
2024-11-14 4:16 ` Christoph Hellwig
2024-11-14 15:14 ` Jens Axboe
2024-11-18 15:23 ` Christoph Hellwig
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