Skip to main content

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

8
  • Did you tweak any kernel settings to get that kind of speed from /dev/urandom? Commented Apr 21, 2018 at 18:12
  • 1
    @kasperd I get the same ~250 MB/s on basic Ubuntu kernel on a few years old laptop. Commented Apr 21, 2018 at 19:13
  • @jpa I tried a bunch of different Ubuntu systems, and the fastest I got was 24.3 MB/s Commented Apr 21, 2018 at 19:18
  • @kasperd No, but the urandom algorithm changes from time to time. It was replaced with a significantly faster algorithm not too long ago. If you are using a recent-ish 4.1x.x kernel you should see improvements. Commented Apr 21, 2018 at 22:17
  • 1
    @jpa Yeah, I should probably ask a separate question about upgrading HWE, as it seems to not be included in apt-get dist-upgrade. I guess such a question would be better suited to Ask Ubuntu. Commented Apr 22, 2018 at 11:17