getting garbage faster using FreeBSD?
Charles Shannon Hendrix
shannon at widomaker.com
Sat Feb 24 00:30:37 UTC 2007
On Fri, 23 Feb 2007 12:46:19 -0800
Doug Barton <dougb at FreeBSD.org> wrote:
> Charles Shannon Hendrix wrote:
> > Sometimes I'll get good speed for awhile (seconds), and then it starts
> > slowing down or stopping.
> > /dev/random halts on me all the time.
> > FreeBSD 6.1 on SPARC64
> First, usual advice of upgrading to the latest -stable, second, what
If you mean -STABLE, no thanks. This is a server, and I've never found
-STABLE to be stable.
> are the values of:
> sysctl kern.random
caesar# sysctl kern.random
I manage to get a bursty 2.5MB/sec awhile ago. Bursty meaning periods of
reading and long pauses where reads block.
The hardware is a Sun Ultra 2, dual 300MHz CPUs.
2.5MB/sec would be fine for most of my uses if it were steady. The problem
is the long pauses where I get 0MB/sec.
For example, when I'm streaming an encrypted backup over the net from this
machine, it would be nice if /dev/random I/O didn't cause any pauses.
Most of the time it doesn't affect much, but it seems like this machine
shouldn't have such a slow /dev/random, and I thought the new code didn't
block in any case.
shannon | The trade of governing has always been monopolized by the
| most ignorant and the most rascally individuals of
| -- Thomas Paine
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