Messages in this thread | | | Date | Tue, 12 Aug 2014 11:14:28 +0200 | From | Pavel Machek <> | Subject | Re: Reading large amounts from /dev/urandom broken |
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On Sun 2014-08-10 14:51:08, Andrey Utkin wrote: > 2014-08-09 10:45 GMT+03:00 Pavel Machek <pavel@ucw.cz>: > > Warn about my quick benchmark? > > > > http://atrey.karlin.mff.cuni.cz/~pavel/quickbench.html > > > > I don't see what is insane about it. Yes, there might be more > > effective generators of random bits, but that is not the point, this > > is quick&dirty attempt at benchmark. > > > > Also people will use cat /dev/urandom > /dev/sdX (and similar) to > > clean hard drives. There should be no need to warn about > > that. (Performance is going to be disk-limited anyway). > > I believe "cat /dev/urandom" doesn't result in reading with _block > size_ more than 32 MB. As it was already explained by Theodore, > currently single read() operation will return "short read" when > requested to give more than 32 MB at once. You still can read more in > consecuential reading acts.
Well, I still don't think this behaviour change is a good idea.
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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