In message <20020714205918.H505@dr-evil.shagadelic.org>, Jason R Thorpe writes:
>On Sun, Jul 14, 2002 at 10:47:44PM -0500, Peter Seebach wrote:
> > The fourth machine is running NetBSD/alpha, on a PC164 at 500Mhz.  Most
> > interestingly, it is running >95% idle.

>What version of NetBSD/alpha?  What is the subnet configuration?

1.6D.  Everyone's on the same network, there's a switch in the middle, and
I think all of the systems involved are talking to it full-duplex, although
one of them is on the wrong side of a hub, so it's sharing bandwidth with a
couple of idle desktops.  Hmm.

More interesting!  A dump of / goes at around 200k/sec, a dump of a 60GB ccd
seems to go much slower, and with more idle time.  Any reason for which dump
should be horribly unhappy on huge filesystems?  e.g., looking at the output
(this is gzipped), I find that it took 94 seconds to dump 19,202,048 bytes of
compressed data from / (that's a 40GB partition), but in 60 seconds, I've
only gotten 688,128 bytes off of my scratch space; that's about 1/20th as
fast.  Hmm.  Trying again, with a longer delay between samples, I get
1,605,632 bytes in 120 seconds, or about 13k/sec.

>Can you provide a dump of:
>	sysctl net.inet

Here's the sysctl net.inet stuff:
net.inet.ip.forwarding = 0
net.inet.ip.redirect = 1
net.inet.ip.ttl = 64
net.inet.ip.forwsrcrt = 1
net.inet.ip.directed-broadcast = 0
net.inet.ip.allowsrcrt = 1
net.inet.ip.subnetsarelocal = 1
net.inet.ip.mtudisc = 1
net.inet.ip.anonportmin = 49152
net.inet.ip.anonportmax = 65535
net.inet.ip.mtudisctimeout = 600
net.inet.ip.hostzerobroadcast = 1
net.inet.ip.lowportmin = 600
net.inet.ip.lowportmax = 1023
net.inet.ip.maxfragpackets = 200
net.inet.icmp.maskrepl = 0
net.inet.icmp.returndatabytes = 8
net.inet.icmp.errppslimit = 100
net.inet.icmp.rediraccept = 1
net.inet.icmp.redirtimeout = 600
net.inet.tcp.rfc1323 = 1
net.inet.tcp.sendspace = 16384
net.inet.tcp.recvspace = 16384
net.inet.tcp.mssdflt = 512
net.inet.tcp.syn_cache_limit = 10255
net.inet.tcp.syn_bucket_limit = 105
net.inet.tcp.init_win = 1
net.inet.tcp.mss_ifmtu = 0
net.inet.tcp.sack = 1
net.inet.tcp.win_scale = 1
net.inet.tcp.timestamps = 1
net.inet.tcp.compat_42 = 0
net.inet.tcp.cwm = 0
net.inet.tcp.cwm_burstsize = 4
net.inet.tcp.ack_on_push = 0
net.inet.tcp.keepidle = 14400
net.inet.tcp.keepintvl = 150
net.inet.tcp.keepcnt = 8
net.inet.tcp.slowhz = 2
net.inet.tcp.newreno = 0
net.inet.tcp.log_refused = 0
net.inet.tcp.rstppslimit = 100
net.inet.tcp.delack_ticks = 204
net.inet.udp.checksum = 1
net.inet.udp.sendspace = 9216
net.inet.udp.recvspace = 41600