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Date:      Thu, 23 Jan 2003 22:07:05 -0600
From:      Dan Nelson <dnelson@allantgroup.com>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        Atte Peltomaki <atte.peltomaki@iki.fi>, freebsd-current@FreeBSD.ORG
Subject:   Re: Performance problems with 5.0-RELEASE
Message-ID:  <20030124040705.GA7945@dan.emsphone.com>
In-Reply-To: <3E309E58.C0745816@mindspring.com>
References:  <20030123162644.GA560@naama> <3E309E58.C0745816@mindspring.com>

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In the last episode (Jan 23), Terry Lambert said:
> Atte Peltomaki wrote:
> > Description:
> > 
> > Every time machine is under heavy load (CPU, network, disks) it
> > completely jamms for fraction of a second for every ten seconds or so,
> > everything just stops and then continues. I noticed this while compiling
> > software and copying files over NFS while listening to MP3's, later
> > realized it wasn't just MP3's that lagged, but the whole machine,
> > including console and everything.
> 
> If you lean on the keyboard, or if you set up the network adapters
> as "entropy" sources, does the problem fix itself?

If you're thinking it's /dev/random blocking on him, 5.0's output never
blocks.  Its output is a PRNG periodically seeded from random data,
including interrupt timings and LAN traffic by default.

http://www.freebsd.org/cgi/man.cgi?query=random&sektion=4&manpath=FreeBSD+5.0-current

-- 
	Dan Nelson
	dnelson@allantgroup.com

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