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From: Bart Van Assche <bvanassche@acm.org>
To: "yukuai (C)" <yukuai3@huawei.com>, axboe@kernel.dk, ming.lei@redhat.com
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	yi.zhang@huawei.com
Subject: Re: [PATCH] blk-mq: allow hardware queue to get more tag while sharing a tag set
Date: Sun, 15 Aug 2021 21:16:51 -0700	[thread overview]
Message-ID: <a47ba8e9-520e-19b5-dd8f-7929f624bbbd@acm.org> (raw)
In-Reply-To: <010fcd39-c819-8e0e-c188-62b1947603bf@huawei.com>

On 8/14/21 2:43 AM, yukuai (C) wrote:
> test result:
> | test round | with this patch | without this patch |
> | ---------- | --------------- | ------------------ |
> | 1          | 4310k           | 4265k              |
> | 2          | 4295k           | 4327k              |
> | 3          | 4217k           | 4213k              |
> | 4          | 4355k           | 4236k              |
> | 5          | 4315k           | 4337k              |
> | average    | 4294k           | 4275k              |

Hi Kuai,

Thank you for having taken the time to rerun the IOPS measurements with
kernel debugging disabled. According to my calculations the standard
deviation (50K) is larger than the difference between the averages
(19K). Unfortunately that makes it hard to draw any conclusion ...

Bart.

      reply	other threads:[~2021-08-16  4:16 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-12  3:18 [PATCH] blk-mq: allow hardware queue to get more tag while sharing a tag set Yu Kuai
2021-07-12  3:19 ` yukuai (C)
2021-07-20 12:33 ` yukuai (C)
2021-07-31  7:13   ` yukuai (C)
2021-07-31 17:15 ` Bart Van Assche
2021-08-02 13:34   ` yukuai (C)
2021-08-02 16:17     ` Bart Van Assche
2021-08-03  2:57       ` yukuai (C)
2021-08-03 18:38         ` Bart Van Assche
2021-08-06  1:50           ` yukuai (C)
2021-08-06  2:43             ` Bart Van Assche
2021-08-14  9:43               ` yukuai (C)
2021-08-16  4:16                 ` Bart Van Assche [this message]

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