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Huge delay for some USB tokens

 
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hiddenman



Joined: 06 Apr 2017
Posts: 1

PostPosted: Thu Apr 06, 2017 5:57 am    Post subject: Huge delay for some USB tokens Reply with quote

Hi guys,

Thank you for the great product!

Actually, we have a problem with some USB tokens (cryptography keys eToken/ruToken): it takes up to 1 minute to read information from them, not sure why. We have a good connection between hosts.

So when the token is in the local machine, it takes few seconds to read private key from it, when it's on the remote machine, it takes at least 30 seconds).

Is it possible to debug/dump traffic somehow, to find where the delay is?

Thank you in advance.
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Peter
Site Admin


Joined: 01 Aug 2007
Posts: 653

PostPosted: Thu Apr 06, 2017 10:57 am    Post subject: Reply with quote

Hi!

Thanks for your interest in our products.

Such problem can arise on high-latency connections when USB device driver sends a lot of small USB requests (thouthands per second). Turnaround time for each request depends on the connection latency. Even 5 or 10ms latency will slow down the communication significantly.
Unfortunately there is no way around this, except changing connection to the one with lower latency.

You can try our USB Logger to dump USB traffic and check the time it takes to process USB requests:
http://www.incentivespro.com/usb-logger-2.0.9.zip
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