topic Re: eMMC performance testing in i.MX Processors

eMMC performance testing

nirmalluhana — Tue, 29 Jan 2019 14:34:22 GMT

Hi,

Release: Yocto-Morty (4.9.51_GA)

Board: i.MX8MQ EVK

I have tested eMMC performance on iMX8MQ EVK board using dd & hdparm and I observed that read speed is approx 135-140 MB/s and write speed is approx 20 MB/s. While referring eMMC datasheet it mentions that eMMC performance as below image.

So, what is the reason I have got that much low performance?

Best regards,

Nirmal

Re: eMMC performance testing

igorpadykov — Tue, 29 Jan 2019 23:31:41 GMT

Hi Nirmal

slow emmc write issues were already reported on web, like

Re: slow eMMC write speed — Linux MMC Development

In particular below presentation emphasize on write performance issues for this type of media.

https://elinux.org/images/4/41/Linux_on_eMMC-_Optimizing_For_Performance.pdf

As for i.MX8MQ, it has many modules and complex architecture with bus arbiters,

so it is not possible to provide max. performance characteristics for every module.

You can increase performance for one module, but that may affect others.

General answer is provided on

USB 3.0 Raw Throughput

Best regards
igor
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Re: eMMC performance testing

nirmalluhana — Wed, 30 Jan 2019 06:25:19 GMT

Hi Igor,

Thanks for your quick support. I understood the reason why it was happening.

Best regards,

Nirmal

Re: eMMC performance testing

jagsgediya — Wed, 25 Jan 2023 01:50:33 GMT

Hi @nirmalluhana What was the reason for slow performance?

Re: eMMC performance testing

chen-wust — Mon, 20 Feb 2023 11:35:09 GMT

Now I also want to improve the read and write speed of emmc. Do you have any progress

Re: eMMC performance testing

Robbi — Thu, 28 Nov 2024 07:56:47 GMT

Hi @nirmalluhana ,

I'm using imx8, can you help with user manual or commands to test eMMC.

Thanks & Regards

Robbi