Now I’m working on measuring Round Trip Time (
Since I’m using 128kbps bitrate and 10 samples per symbol, sample rate
And I do not give any options about FUSB_BLOCK_SIZE and FUSB_NBLOCKS. So
they might be 0.
In this case, the result is following:
Minimum RTT : 1.96ms
Maximum RTT : 5.12ms
As Thomas S.'s paper, this result is so reasonable. However, if I
FUSB_BLOCK_SIZE=2048 and FUSB_NBLOCKS=8 such like paper mentioned, it
to be messed up.
RTT becomes larger and variation is also broaden. Also it gives me lots
What is the effect of these two parameters? As I know, in USB bulk
mode the USB packet size is fixed as 512 bytes. So these two parameters
determine the packet size transfered between Linux kernel and user
does not affect physical USB transaction. Am I correct? If yes, why does
make overrun error?
Please give some clues. Thanks in advance!!!
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