[1.3] Linux platform, OTA speed is very slow, how to get better speed

[GnarFang]

Reproduction steps

The OTA-provider sample can work fine, And using the wifi/Ethernet to transmit data. but the speed of it is sadly slow, I have a 77mb *.ota file, and it made alomst 3 hours how can I resolve this situation, thank you guys very much!!

My platform is Linux platform. OTA Provider and request are running on different Linux platform (Soc i.MX93 or i.MX8MM)

#provider chip-ota-provider-app --discriminator 22 --secured-device-port 5565 --KVS /tmp/chip_kvs_provider --filepath /home/root/thermostat-app.ota &

#request chip-ota-requestor-app --discriminator 18 --secured-device-port 5560 --KVS /tmp/chip_kvs_requestor --periodicQueryTimeout 60 --otaDownloadPath /home/root/download.bin

Even if I add -P 5 to decrease the polling time, but the speed didn't improve. chip-ota-provider-app --discriminator 22 --secured-device-port 5565 --KVS /tmp/chip_kvs_provider --filepath /home/root/thermostat-app.ota -P 5&

[1713415243.648261][1468:1468] CHIP:ATM: ReceiveInit [1713415243.648271][1468:1468] CHIP:ATM: Proposed Transfer Control: 0x20 [1713415243.648281][1468:1468] CHIP:ATM: Range Control: 0x0 [1713415243.648291][1468:1468] CHIP:ATM: Proposed Max Block Size: 10240 [1713415243.648301][1468:1468] CHIP:ATM: Start Offset: 0x0000000000000000 [1713415243.648311][1468:1468] CHIP:ATM: Proposed Max Length: 0x0000000000000000 [1713415243.648321][1468:1468] CHIP:ATM: File Designator Length: 29 [1713415243.648331][1468:1468] CHIP:ATM: File Designator: /home/root/thermostat-app.ota [1713415243.650419][1468:1468] CHIP:BDX: OutputEvent type: InitReceived [1713415243.650440][1468:1468] CHIP:ATM: Sending BDX Message [1713415243.650451][1468:1468] CHIP:ATM: ReceiveAccept [1713415243.650460][1468:1468] CHIP:ATM: Transfer Control: 0x20 [1713415243.650470][1468:1468] CHIP:ATM: Range Control: 0x0 [1713415243.982741][1468:1468] CHIP:ATM: Max Block Size: 1024 [1713415243.982754][1468:1468] CHIP:ATM: Length: 0x0000000000000000

The Max Block Size is limited to 1024. only 10KB data can be transferred in one second.

Bug prevalence

Whenvever I do this.

GitHub hash of the SDK that was being used

1.2 /1.3

Platform

IMX8

Platform Version(s)

No response

Type

Core SDK Performance Improvement

Anything else?

No response

[KEEPHEADU]

I have the same problem. I use efr32mg24.

[Trishia]

I also have same problem to transfer chip-ota-requestor-app-v2.ota(94M) that I made via ota_image_tool.py for testing TC-SU-3.2 as a OTA Provider/Controller DUT. It takes long time almost 3hours to download now.

And also why ~/apps/chip-ota-requestor-app(94M) on Test Harness is so big compared to chip-ota-requestor-app(8.6M) built on Mac Book?

And also, I tried optimizing options like below in examples/ota-requestor-app/linux/args.gni

# Change true to false to disable tracing support
matter_enable_tracing_support = false

# Add to disable ble
chip_config_network_layer_ble=false

# Add optimizing options for -Os
is_debug=false
optimize_for_size=true 

But the result size is 47M and it still takes 1 and half ours to download.

How to reduce the size of chip-ota-requestor-app more on Ubuntu? How can I reduce downloading time?

@bzbarsky-apple, Advise me if you have any solution plz.

[bzbarsky-apple]

No idea for Linux, sorry. You could try using nm and the like to try to investigate why the binary is as big as it is....

[andy31415]

This is a large binary and we probably go over UDP ... I am not sure we are optimized for speed there.

Was the binary stripped? Is the performance better on other platforms?

[andy31415]

@Trishia , @GnarFang for the large binary size, could you confirm if you ran strip on it?

I ran a short test on my machine and the size went from 95MB to 4.5MB for otarequestor (although that is probably not the image that should be OTAed)

[andy31415]

Added NXP tag due to usage of ota_image_tool.py. @doru91

[andy31415]

The original bug seems to be for iMX ... so assuming this is general NXP rather than linux?

[Trishia]

@Trishia , @GnarFang for the large binary size, could you confirm if you ran strip on it?

I ran a short test on my machine and the size went from 95MB to 4.5MB for otarequestor (although that is probably not the image that should be OTAed)

Thanks!!! @andy31415

I didn't know about strip before. As a result, I could reduce the size of chip-ota-requestor-app to 1.5M with Optimization options that I mentioned above (https://github.com/project-chip/connectedhomeip/issues/33039#issuecomment-2406611066).

ubuntu@raspberrypi:~/connectedhomeip/out$ ls -alh
total 4.3M
drwxrwxr-x  3 ubuntu ubuntu 4.0K Oct 14 16:21 .
drwxrwxr-x 21 ubuntu ubuntu 4.0K Oct 11 15:16 ..
-rwxrwxr-x  1 ubuntu ubuntu 1.5M Oct 14 16:03 chip-ota-requestor-app-v2
-rw-rw-r--  1 ubuntu ubuntu 1.5M Oct 14 16:16 chip-ota-requestor-th-v2.ota