topic Re: Reduce launch time on Real-time_Edge in i.MX Processors

Reduce launch time on Real-time_Edge

OlivierG — Wed, 28 May 2025 08:18:06 GMT

I'm using "Real-time_Edge" to reduce the launch time of an application.
This application uses Mipi for video capture (/dev/video) and for display (/dev/dri/card0).

Is there a way to reduce the launch time of this application as much as possible?
Can it be launched via Uboot?

Greetings

Olivier

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Mon, 02 Jun 2025 19:39:01 GMT

Hello @OlivierG

I hope you are doing very well.

Could you please share what processor are you using?

Also, if your processor is i.MX93, i.MX 95, i.MX 8M, i.MX 8ULP or i.MX 8QXP, you can take a look to the application note AN14093, that explains how to active Falcon boot on those processors with excellent results:

About U-boot, No, U-boot can't start applications for Linux user space.

Best regards,

Salas.

Re: Reduce launch time on Real-time_Edge

OlivierG — Tue, 03 Jun 2025 12:53:07 GMT

I use a IMX 93 card

i see in the first panel that the total boot time for this card is 9170 ms

My boot time is about 20000 ms (20 sec) even with a kernel build as "core minimal"

How is built the kernel to obtain a 9170 ms boot time ?

Greetings

Olivier

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Tue, 03 Jun 2025 16:36:56 GMT

Hello @OlivierG

Could you please clarify your kernel version?

Also, if possible, share the steps you followed to build your image and check by my side.

Best regards,

Salas.

Re: Reduce launch time on Real-time_Edge

OlivierG — Tue, 10 Jun 2025 07:22:43 GMT

I was using Yocto Real Time Edge 3.1

Now I'm using Falcon: Yocto Project BSP 6.6.23_2.0.0 Release

At Falcon startup, I get:

Trying to boot from EMMC2

for about 45 seconds

How can I eliminate this delay?

Greetings

Olivier

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Tue, 10 Jun 2025 16:10:03 GMT

Hello @OlivierG

Please double check if you followed the below step from the application note:

Best regrads,

Salas.

Re: Reduce launch time on Real-time_Edge

OlivierG — Wed, 11 Jun 2025 08:07:17 GMT

This patch was automatically apply by bitbake, i verify this in the C files

i must precise that the kernel is on a SD card not in eMMC memory

Greetings

Olivier

Re: Reduce launch time on Real-time_Edge

OlivierG — Mon, 16 Jun 2025 12:37:21 GMT

I tried flashing Falcon to an MMC drive. With the following command line:

uuu -b emmc_all imx-boot-imx93evk-fastboot-sd.bin-flash_singleboot imx-image-fastboot-imx93evk-fastboot.rootfs.wic.zst

I received the error message LIBUSB_TIME_OUT_ERROR

With the uuu utility both on Linux AND Windows (see screenshot on Windows)

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Mon, 16 Jun 2025 17:24:52 GMT

Hello @OlivierG

Can you please try just load the bootloader?

$ sudo uuu -b sd imx-boot-imx93evk-fastboot-sd.bin-flash_singleboot

Let me know if you are still having the issue.

Do you have other board to test?

Best regards,

Salas.

Re: Reduce launch time on Real-time_Edge

OlivierG — Tue, 17 Jun 2025 07:26:47 GMT

i tried this command
After a brief passage at 15% I have again the error message : LIBUSB_ERROR_TIMEOUT

Olivier

Re: Reduce launch time on Real-time_Edge

OlivierG — Tue, 17 Jun 2025 07:28:18 GMT

i precise a have not another board to tesr

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Wed, 18 Jun 2025 16:55:33 GMT

Hello @OlivierG

It make me think there is a compilation issue.

Please, try to download the bootloader of our official BSP. If you are able to load in to the board, there is a compilation issue.

In case you have the same issue, maybe there is a hardware issue.

Best regards,

Salas.

Re: Reduce launch time on Real-time_Edge

OlivierG — Thu, 19 Jun 2025 12:44:45 GMT

its works with a pre built BSP : Real-time_Edge_v3.1_IMX93-14X14-LPDDR4X-EVK

is there a pre build Falcon BSP ?

Greetings

Olivier

Re: Reduce launch time on Real-time_Edge

Manuel_Salas — Sat, 21 Jun 2025 17:59:07 GMT

Hello @OlivierG

Unfortunately, not, there is not a pre-built Falcon.

You should re-try to compile it.

Best regards,

Salas.