# Agxxavier industrial ufs3.1 speed too slow **URL:** \ **Category:** Jetson AGX Xavier\ **Tags:** board-design\ **Created:** [September 26, 2025, 6:54am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116 "2025-09-26T06:54:38Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [September 26, 2025, 6:54am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/1 "2025-09-26T06:54:38Z")
Hi, We are working on agx xavier industrial on our custom board with R35.6.1 and would like to port a non-removed ufs device(KIOXIA THGJFGT1T45BAB8). Please see the changes below. ```auto diff --git a/sources/hardware/nvidia/platform/t19x/galen/kernel-dts/tegra194-p2888-0001-p2822-0000.dts b/sources/hardware/nvidia/platform/t19x/galen/kernel-dts/tegra194-p2888-0001-p2822-0000.dts index 0f8e25d0d..fa5ab59f9 100644 --- a/sources/hardware/nvidia/platform/t19x/galen/kernel-dts/tegra194-p2888-0001-p2822-0000.dts +++ b/sources/hardware/nvidia/platform/t19x/galen/kernel-dts/tegra194-p2888-0001-p2822-0000.dts @@ -82,6 +82,13 @@ interrupts = , ; }; }; + + ufshci@2450000 { + status = "okay"; + /delete-property/ nvidia,cd-gpios; + }; }; ``` We have already detected the UFS device as /dev/sda. However, the read/write speeds are much slower than those specified in the documentation (900~1000MB/s). ```auto p@p-desktop:~$ sudo mount /dev/sda /mnt/ufs_test p@p-desktop:~$ sudo dd if=/dev/zero of=/mnt/ufs_test/testfile.img bs=1G count=1 conv=fdatasync status=progress 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 4 s, 277 MB/s 1+0 records in 1+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 25.8974 s, 41.5 MB/s p@p-desktop:~$ sudo /sbin/sysctl -w vm.drop_caches=3 vm.drop_caches = 3 p@p-desktop:~$ sudo dd if=/mnt/ufs_test/testfile.img of=/dev/null bs=1G count=1 status=progress 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2 s, 558 MB/s 1+0 records in 1+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.93587 s, 555 MB/s ``` ![image](https://global.discourse-cdn.com/nvidia/original/4X/9/1/1/91111548455c3c9347a245768561075ed3b9721c.png) Is there anything I missed? Please see the the ufs dmesg below. ```auto p@p-desktop:~$ sudo dmesg | grep ufs [7.285931] ufs_tegra 2450000.ufshci: freq-table-hz property not specified [7.295209] ufs_tegra 2450000.ufshci: ufshcd_populate_vreg: Unable to find vdd-hba-supply regulator, assuming enabled [7.522892] scsi host0: ufshcd [7.545745] ufs_tegra 2450000.ufshci: ufshcd_print_pwr_info:[RX, TX]: gear=[1, 1], lane[1, 1], pwr[SLOWAUTO_MODE, SLOWAUTO_MODE], rate = 0 [7.546165] ufs_tegra 2450000.ufshci: dme-link-startup Successful [7.591417] ufs_tegra 2450000.ufshci: Total device capacity is 255944818688 [7.591607] ufs_tegra 2450000.ufshci: Physical erase block size is 4194304 [7.591798] ufs_tegra 2450000.ufshci: Allocation size is 4194304 [7.591991] ufs_tegra 2450000.ufshci: Max lun size is 61022 [7.597473] ufs_tegra 2450000.ufshci: default ref_clk_freq = 0 [7.608743] ufs_tegra 2450000.ufshci: HS Mode RX_Gear:gear_3 TX_Gear:gear_3 RATE_B series [7.620205] ufs_tegra 2450000.ufshci: ufs scrambling feature enabled [7.626777] ufs_tegra 2450000.ufshci: ufshcd_print_pwr_info:[RX, TX]: gear=[3, 3], lane[1, 1], pwr[FAST MODE, FAST MODE], rate = 2 ``` Thx Yen ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [September 26, 2025, 8:39am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/3 "2025-09-26T08:39:34Z")
Hi, Please get UART log for reference. Would like to ensure `odm-data UFS_x1_L1` is enabled. ---
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [September 26, 2025, 8:50am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/4 "2025-09-26T08:50:41Z")
Hi Please see the uart log below. [dmesg.log](https://forums.developer.nvidia.com/uploads/short-url/gpP8cdE0uauqZq13kq04qfXSAnQ.log) (137.0 KB) How do I enable odm-data for UFS\_x1\_L1? Thx Yen ---
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [September 30, 2025, 2:12am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/5 "2025-09-30T02:12:21Z")
Hi, Any updates? Thx Yen ---
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [September 30, 2025, 2:25am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/6 "2025-09-30T02:25:54Z")
Hi The attached log is for flashing the OS. [flash.log](https://forums.developer.nvidia.com/uploads/short-url/wDrIirJqvhSey298WtRMJxaPnwS.log) (489.3 KB) I saw UFS\_x1\_L1 in the log. Does this mean we have already enabled UFS\_x1\_L1 ? ![image](https://global.discourse-cdn.com/nvidia/original/4X/a/0/a/a0a07407da1150f9dc85e077943798b2a2b5d6f0.png) Thx Yen ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [September 30, 2025, 5:20am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/7 "2025-09-30T05:20:47Z")
Hi, The odmdata looks correct. Please check 1. Run the command to ensure ufs is enabled: ```auto $ xxd /proc/device-tree/ufshci@2450000/status ``` 1. Check if adding this is a must-have in your design ```auto /delete-property/ nvidia,cd-gpios; ``` 1. The prints are not expected and please set these in device tree correctly: ```auto [2.542965] ufs_tegra 2450000.ufshci: freq-table-hz property not specified [2.549325] ufs_tegra 2450000.ufshci: ufshcd_populate_vreg: Unable to find vdd-hba-supply regulator, assuming enabled [2.560107] ufs_tegra 2450000.ufshci: ufshcd_get_vreg: vccq get failed, err=-517 ``` 1. Please check voltage of the pins: [Cannot find ufs device in system - #12 by Trumany](https://forums.developer.nvidia.com/t/cannot-find-ufs-device-in-system/251031/12) ---
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [October 9, 2025, 6:42am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/9 "2025-10-09T06:42:45Z")
Hi, 1. ```auto p@p-desktop:~$ xxd /proc/device-tree/ufshci@2450000/status 00000000: 6f6b 6179 00 okay. ``` 2.This is necessary. `/delete-property/ nvidia,cd-gpios;` 3.After adding freq-table-hz, I got this error messge “ufs\_tegra 2450000.ufshci: ufshcd\_init\_clocks: pllrefe\_vcoout clk get failed, -517“ and the OS enters a dead loop, please see the full dmesg for details. BTW, any freq-table-hz values will show the same error message [dmesg\_20251008.txt](https://forums.developer.nvidia.com/uploads/short-url/jvsXxmtwxWfAzk7H8cM9soWYsXZ.txt) (258.2 KB) ```auto ufshci@2450000 { status = "okay"; /delete-property/ nvidia,cd-gpios; + freq-table-hz = <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>, <0 0>; }; }; ``` 4.voltage of the pins is confirmed. Any suggestions for setting freq-table-hz? Thx Yen ---
**Author:** ![yenchao](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yenchao](https://forums.developer.nvidia.com/u/yenchao)\ **Post date:** [October 15, 2025, 8:46am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/10 "2025-10-15T08:46:02Z")
Hi, Any updates? Thx Yen ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [October 15, 2025, 9:11am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/11 "2025-10-15T09:11:57Z")
Hi, The function is enabled on AGX Xavier developer kit. Would suggest compare the properties in device tree: ```auto $ ls /proc/device-tree/ufshci@2450000/ clock-names nvidia,configure-uphy-pll3 reg clocks nvidia,enable-hs-mode reset-names compatible nvidia,enable-scramble resets dma-coherent nvidia,enable-x2-config status interconnect-names nvidia,mask-fast-auto-mode ufs_variant interconnects nvidia,max-hs-gear vcc-max-microamp interrupts nvidia,max-pwm-gear vccq2-max-microamp iommus phandle vccq2-supply name pinctrl-0 vccq-max-microamp nvidia,cd-gpios pinctrl-1 vccq-supply nvidia,cd-wakeup-capable pinctrl-names vcc-supply // check all the nodes $ xxd /proc/device-tree/ufshci@2450000/vcc-supply 00000000: 0000 002d ...- $ xxd /proc/device-tree/ufshci@2450000/compatible 00000000: 7465 6772 612c 7566 735f 7661 7269 616e tegra,ufs_varian 00000010: 7400 t. $ xxd /proc/device-tree/ufshci@2450000/clocks 00000000: 0000 0004 0000 0120 0000 0004 0000 0049 ....... .......I 00000010: 0000 0004 0000 004e 0000 0004 0000 0050 .......N.......P 00000020: 0000 0004 0000 004a 0000 0004 0000 004c .......J.......L 00000030: 0000 0004 0000 004d 0000 0004 0000 004b .......M.......K 00000040: 0000 0004 0000 004f 0000 0004 0000 00a4 .......O........ 00000050: 0000 0004 0000 00a3 0000 0004 0000 0066 ...............f 00000060: 0000 0004 0000 000e 0000 0004 0000 0097 ................ 00000070: 0000 0004 0000 0079 .......y $ xxd /proc/device-tree/ufshci@2450000/... ``` To check if there is any deviation. Also would suggest insert the card to AGX Xavier developer kit and run the benchmark. ---
**Author:** ![henrylin3](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@henrylin3](https://forums.developer.nvidia.com/u/henrylin3)\ **Post date:** [October 16, 2025, 9:20am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/12 "2025-10-16T09:20:47Z")
Hi DaneLLL, I’m yen’s colleague and answer some test result below: # 1. base on your reply, I reproduce the same check base on follwoing conditions: H/W：AGX Xavier Industrial devkit(p2822+p2888) OS image：comes from original L4T R35.6.1 Other modifications： (1).convert the /boot/dtb/kernel\_tegra194-p2888-0008-p2822-0000.dtb ```auto cd /boot/dtb dtc -I dtb -O dts -o 1.dts kernel_tegra194-p2888-0008-p2822-0000.dtb ``` (2).update the status property in block **ufshci@2450000** of dts file ![20251016_convert_dtb_to_dts](https://global.discourse-cdn.com/nvidia/original/4X/7/8/7/787d87d73cfb2a19fc71727869e94e820ab792d6.png) (3).re-compile the dts file back to dtb ```auto cp kernel_tegra194-p2888-0008-p2822-0000.dtb kernel_tegra194-p2888-0008-p2822-0000.dtb.bak dtc -I dts -O dtb -o kernel_tegra194-p2888-0008-p2822-0000.dtb 1.dts ``` (4).reboot the devkit (5).check reslated info: ![20251016_dmesg_samsung_ufs](https://global.discourse-cdn.com/nvidia/original/4X/f/7/1/f710bef4b85122eb2befc22456b34ac7a043b992.png) ![20251016_samsung_ufs_string_descriptor](https://global.discourse-cdn.com/nvidia/original/4X/c/6/1/c619e886cb97126fa12d5e0aa5836cbd86b5c627.png) ![20251016_samsung_ufs_lsblk](https://global.discourse-cdn.com/nvidia/original/4X/6/7/5/6758f08956e08cbc221fbd6b8570449aeca49bba.png) (6).check the device-tree items you mentioned below: ![Forum_Check_Cmd_result](https://global.discourse-cdn.com/nvidia/original/4X/a/7/5/a756a725c032e48fc5ea82dfa0367bb6fc1b68f0.jpeg) as you can see, the result is the same as yours. # 2. using the SAMSUNG 128GB UFS card refer to the thread [cannot-find-ufs-device-in-system](https://forums.developer.nvidia.com/t/cannot-find-ufs-device-in-system/251031/23) test the read / write performance: ![20251016_test_performance_by_script](https://global.discourse-cdn.com/nvidia/original/4X/4/d/9/4d965bc4b8f628a3fa93554398b5e7b968f0183c.png) 3. compare to the UFS card’s R/W performance it claimed on the package. it should be Read 500MB/s, Write 200MB/s. The WRITE TEST looks OK, but the READ TEST result seems just half of the value it claimed. How could I improve the READ performance on the AGX Xavier industrial devkit? ---
**Author:** ![henrylin3](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@henrylin3](https://forums.developer.nvidia.com/u/henrylin3)\ **Post date:** [October 21, 2025, 12:57am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/14 "2025-10-21T00:57:29Z")
Hi DaneLLL, Base on your suggestion, we’ve collected related info from the device, any suggestion for the information we provide?? ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [October 21, 2025, 2:15am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/15 "2025-10-21T02:15:55Z")
Hi, The result on AGX Xavier developer kit is supposed to be the maximum throughput. Do you get identical result on your custom board? ---
**Author:** ![henrylin3](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@henrylin3](https://forums.developer.nvidia.com/u/henrylin3)\ **Post date:** [October 23, 2025, 2:51am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/17 "2025-10-23T02:51:37Z")
Hi, So, is it correct to say that even though the Samsung 256GB UFS card is rated at 500 MB/s read and 200 MB/s write, when used on the AGX Xavier, the maximum throughput can only reach 250 MB/s read and 180 MB/s write? ---
**Author:** ![DaneLLL](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/danelll/32/14043_2.png) [@DaneLLL](https://forums.developer.nvidia.com/u/DaneLLL)\ **Post date:** [October 23, 2025, 5:00am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/18 "2025-10-23T05:00:40Z")
Hi, Yes, this can be the best we can achieve on developer kit. With your custom board, there is error prints in _dmesg_. You may try to resolve it by adding debug prints in ufs driver. Suppose it can achieve same performance on the custom board. ---
**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\ **Post date:** [November 19, 2025, 4:30am UTC](https://forums.developer.nvidia.com/t/agxxavier-industrial-ufs3-1-speed-too-slow/346116/20 "2025-11-19T04:30:16Z")
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