On Wed, 18 Oct 2017, Angelo Dureghello wrote:

> Ok will do some test, maybe also adding 1 stop bit

Adding a stop bit or two will marginally reduce the effective data rate 
but it could be that 115200 baud is unrealistic.

> or killing some processes may help ? I am already into initramfs, so the 
> write should not be that heavy.

I take it you mean storing into rootfs. So the latency is caused by some 
other interrupt source (not flash storage) with higher priority than the 
uart irq...

> Will try also zmodem in case.
> 

Keep in mind that a larger block size would mean a larger penalty for a 
single overrun, which can reduce throughput.

-- 

> Regards,
> Angelo
> 
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