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Altera_Forum
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16 years ago

SignalTap offloading time difference in the same fix (linux vs windows)

I have compared SignalTap offloaiding time for Windows XP and Ubuntu (linux) Windows XP: ~2 sec Ubuntu (linux): ~40 sec Quartus 9.0 sp1 Ubuntu x32 vs Windows XP Altera USB downlo...
Altera_Forum's avatar
Altera_Forum
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16 years ago

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I guess, the performance difference is due to USB driver operation. I'm aware of similar effects with Windows applications that are operating the USB I/O in an inappropriate way. As long as the driver has no configurable settings (as the original Windows FTDI drivers have for FIFO latency), you have probably no option to influence the USB Blaster performance. Except for reporting to Altera support and hope for a change.

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But I have received such answer:

He uses Slackware linux (usb-bb2 by libusb). And he didn't have any timing problem with SignalTap.

What difference between this Linux distributives?