¶ TF card reading and writing speed test
¶ 1.Hardware connection
Insert the TF card into the corresponding card slot (as shown in the picture)
¶ 2. Software testing
¶ 2.1. Turn on adb debugging
¶ 2.2. Enter the command to test
Find the node of the tf card -- my node here is mmcblk0
rk3588s_t:/dev/block # ls
By name dm-5 Loop10 Loop2 Loop8 mmcblk1boot1 mmcblk1p14 mmcblk1p6 ram1 ram15 ram7
dm-0 dm-6 loop 11 loop 3 loop 9 mmcblk1p1 mmcblk1p15 mmcblk1p7 ram10 ram2 ram8
dm-1 dm-7 Loop12 Loop4 mapper mmcblk1p10 mmcblk1p2 mmcblk1p8 ram11 ram3 ram9
dm-2 dm-8 Loop13 Loop5 mmcblk0 mmcblk1p11 mmcblk1p3 mmcblk1p9 ram12 ram4 vold
dm-3 Loop0 Loop14 Loop6 mmcblk1 mmcblk1p12 mmcblk1p4 platform ram13 ram5 zram0
dm-4 loop 1 loop 15 loop 7 mmcblk1boot0 mmcblk1p13 mmcblk1p5 ram0 ram14 ram6
¶ 2.2.1. Reading speed test
write command
dd if=/dev/zero of=/dev/block/mmcblk0 bs=4M count=64 && sync
Effect
¶ 2.2.2. Reading speed test
read command
dd if=/dev/block/mmcblk0 of=/dev/null bs=4M count=64
Effect
