We have performed SD card file system profiling on c5515 board with class 2 and class 10 card and the profiling figures are shown below.
File open operation :
To open First file, it takes nearly 6 millisecond on class 10 card and 9 millisecond in class 2.
To open Twentieth file, it takes nearly 16 millisecond.
As number of files increases, the time to open file is also increasing.
File write operation.:
Data write of 1MB on class 2 takes nearly 10sec and on class 10 takes nearly 6.5 sec
We want to write 650kb in 2sec at most, but now on class 10 it takes nearly 4.5 sec,
File read operation.
Data read of 4KB on class2 takes 26 millisecond and on class 10 takes nearly 22 milliseconds
File close operation takes around 6 millisecond.
We are expecting a better file system performance, Please can any one suggest how we can improve the performance
The filesystem driver used is from CSL version 2.50
Please let us know what best can be done to reduce the time of file operations.
Regards
Guru