I have a J120 (rev11) base board with a 1TB EVO 970 PRO installed. I’ve measured the write performance using
dd if=/dev/zero of=/tmp/test1.img bs=1G count=1 oflag=dsync
Write performance using a TX1 (Jetpack 4.3.1) is around 430 MB/s.
Running the same command on a TX2 - same board, same SSD I only get 230 MB/s.
I’ve used the https://auvidea.eu/download/firmware/TX2/v2.2/J90_v2.2_4.2.2.tar.bz2 from AUVIDEA to get the USB on the board working.
lspci -vv reports “Width x4” on both setups. I’ve also tried running jetsonclocks.
I am running a bit out of ideas. One thing I did notice is that the plugin-manager seems to have changed on 4.3.1, and that it doesn’t seem to apply any of the fragments - nothing is reported on dmesg, as I believe it used to. I also couldn’t find any documentation on what changed there. E.g. I believe ‘pcie0_lane2_mux’ is disabled.