Date: Fri, 24 Jan 2003 14:12:55 -0800 (PST) From: Nate Lawson <nate@root.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: freebsd-current@freebsd.org Subject: Re: Performance problems with 5.0-RELEASE Message-ID: <Pine.BSF.4.21.0301241410390.75993-100000@root.org> In-Reply-To: <3E31B72F.9349FD17@mindspring.com>
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On Fri, 24 Jan 2003, Terry Lambert wrote: > Nate Lawson wrote: > > > > 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? > > > > This can't be it since /dev/random is non-blocking in 5.x > > See other posting; though I could certainly write an app that > would keep hitting /dev/random until it got what it wanted... In fact, it's non-blocking AND never returns a 0 byte read len when its entropy is depleted. Try cat /dev/random (I am not saying this behavior is good, just that it is.) -Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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