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
已解决! 转到解答。
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
Best regards
igor
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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
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hi @nirmalluhana What was the reason for slow performance?