Re: [PATCH v14 0/3] scsi: ufs: Add Host Performance Booster Support

From: Bart Van Assche <bvanassche@acm.org>
To: daejun7.park@samsung.com, Greg KH <gregkh@linuxfoundation.org>
Cc: "avri.altman@wdc.com" <avri.altman@wdc.com>,
	"jejb@linux.ibm.com" <jejb@linux.ibm.com>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
	"asutoshd@codeaurora.org" <asutoshd@codeaurora.org>,
	"stanley.chu@mediatek.com" <stanley.chu@mediatek.com>,
	"cang@codeaurora.org" <cang@codeaurora.org>,
	"huobean@gmail.com" <huobean@gmail.com>,
	ALIM AKHTAR <alim.akhtar@samsung.com>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Sung-Jun Park <sungjun07.park@samsung.com>,
	yongmyung lee <ymhungry.lee@samsung.com>,
	Jinyoung CHOI <j-young.choi@samsung.com>,
	Adel Choi <adel.choi@samsung.com>,
	BoRam Shin <boram.shin@samsung.com>,
	SEUNGUK SHIN <seunguk.shin@samsung.com>
Subject: Re: [PATCH v14 0/3] scsi: ufs: Add Host Performance Booster Support
Date: Thu, 17 Dec 2020 17:58:14 -0800	[thread overview]
Message-ID: <e8b08117-0670-7222-05bb-a88910a93be1@acm.org> (raw)
In-Reply-To: <20201218010520epcms2p1f7994bde414008ea1f44c733350308db@epcms2p1>

On 12/17/20 5:05 PM, Daejun Park wrote:
> Here is my iozone script:
> iozone -r 4k -+n -i2 -ecI -t 16 -l 16 -u 16 
> -s $IO_RANGE/16 -F mnt/tmp_1 mnt/tmp_2 mnt/tmp_3 mnt/tmp_4 
> mnt/tmp_5 mnt/tmp_6 mnt/tmp_7 mnt/tmp_8 mnt/tmp_9 mnt/tmp_10 mnt/tmp_11 
> mnt/tmp_12 mnt/tmp_13 mnt/tmp_14 mnt/tmp_15 mnt/tmp_16
> 
> Result:
> +----------+--------+---------+
> | IO range | HPB on | HPB off |
> +----------+--------+---------+
> |   1 GB   | 294.8  | 300.87  |
> |   4 GB   | 293.51 | 179.35  |
> |   8 GB   | 294.85 | 162.52  |
> |  16 GB   | 293.45 | 156.26  |
> |  32 GB   | 277.4  | 153.25  |
> +----------+--------+---------+

Hi Daejun,

What are the units of the numbers in columns 2 and 3?

Thanks,

Bart.