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Altera_Forum
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14 years ago

Timing analysis of the I/O processes

Hello i have a device driver that comunicates with an onchip mem. I need to see how much time it takes to read and write from the onchip mem. I've put several printk's with timestamp to debug how...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

On userspace you will see 1000 mSec or more sometimes, as the user program can be delayed very long by the Kernel preempting it at any point.

-Michael