On Mon, 2009-12-07 at 18:50 -0600, Wilson, Eric wrote: > Theresa; > > When you say the speedtest.net produces good results, what exactly > does that mean? What speeds do they report for each scenario?
speedtest.net download 3.67 Mb/s upload 0.48Mb/s ping 22 ms cablemo.net download 3.11 8Mbps upload 0.48 Mbps In both cases, that's better than our paid cable plan calls for. > Browser speed results are somewhat objective and depend on how the > images are rendered. What speeds are determined from non-brower based > tasks (e.g. scp, ftp, sftp, or BitTorrent copies) Haven't tried other tasks. With the browser test, from an opened Firefox browser pointing to the home page, I started the wireshark capture, put "http://www.theregister.co.uk"; into the URL bar and hit the "enter" key. I figured the test as being "done" when the resulting page, including all its embedded ads and links, was completely done loading. > What speeds are observed on the local network amongst the various > clients? Not noticing any delay in accessing the NAS device or the networked printer. > What are the DNS settings for each client? Are DNS timeouts a > possibility? Nothing peculiar in /etc/dhcp3/dhclient.conf and nothing in /etc/resolv.conf except the nameserver IP addresses provided by our ISP (as in, I did not create those entries, they were generated by NetworkManager automatically). Ethernet connection was configured to connect automatically by Automatic (DHCP) Method. When I was running the old router and OpenBSD firewall, I had the Ethernet connection set to manual (IP address, subnet, gateway, nameserver, dns) and disabled IPV6 settings by adding this line to /etc/sysctl.conf: "net.ipv4.tcp_window_scaling=0" You can disable it temporarily by running this from a command line as root, too: "echo 0 > /proc/sys/net/ipv4/tcp_window_scaling" That line has been commented out of /etc/sysctl.conf; I tried turning the IPV4 scaling back on temporarily, and that does not do anything to improve things. If DNS timeouts are a possibility, then why is it that Firefox in the host computer (Ubuntu 9.04) is bog-slow; Firefox in any Linux virtual box (Ubuntu 9.04, 9.10, CentOS 5.4) is bog-slow; Firefox in a Windows virtual box (W2K) is fast as a screaming meemie? Thanks for the support, though ... this is frustrating! Theresa > Cheers; > > E! > > > > On Mon, Dec 7, 2009 at 4:05 PM, Theresa Kehoe <[email protected]> wrote: > Installed a new 8-port Cisco Linksys router last week. > Noticed by > Friday that web performance was very sluggish. Any URL takes > 5-15 > seconds to load. Same behavior on both home computers. Both > run Ubuntu > (one 8.10, the other 9.04), both use Firefox for web > browsing. Figured > I'd wait until Monday, see if it got worked out, if not, would > call. > > Note, speed tests say my connection speed is great (both Cable > America's > test, and www.speedtest.net) > > Called Monday; on advice of tech, disconnected router. > Plugged cable > modem directly into one desktop computer (running Ubuntu > 8.04). Reset > modem, then rebooted computer. Same problem. So, reconnected > router. > > Then I started doing some testing to see if changing browser > or > operating system makes a difference. System used for test: > > Host computer, Intel Core 2 Duo E7400 @ 2.80 GHz, 4GB RAM, > Intel 82566DC > Gigabit Network Connection, running fully updated Ubuntu 9.04 > i386, > kernel 2.6.28-17-generic. Web browser is Firefox 3.0.15. > Host runs Sun > VirtualBox 3.0.12. VirtualBox clients include CentOS 5.4, > Ubuntu 9.04 > and 9.10, and Windows 2000. > > Test: Launch Firefox, browse to http://www.theregister.co.uk > and time > how long it takes for the page to fully load. Capture eth0 > traffic with > Wireshark; save logs. > > Results: > > 1. Using Firefox 3.0.15 on host, takes 19 seconds to load. > > 2. Using CentOS 5.4 as client, Firefox 3.0.12 as browser, > takes 45 > seconds to load. > > 3. Using Windows 2000 as client, Firefox 3.0 as browser, takes > 4 seconds > to load. > > Note, did not log Wireshark, but using Firefox 3.5, using > Opera, or > running Ubuntu in a VirtualBox is just as slow. Other web > sites, same > behavior. Once a connection to a site is established, further > navigation within that site runs reasonably well. > > In the Windows 2000 virtual client, using either IE or > Firefox, all web > sites load quickly. > > I am certainly perplexed! -- does anyone have any ideas, or is > anyone > willing to plow through the Wireshark log files? > > Theresa > > -- > Central West End Linux Users Group (via Google Groups) > Main page: http://www.cwelug.org > To post: [email protected] > To subscribe: [email protected] > To unsubscribe: [email protected] > More options: http://groups.google.com/group/cwelug > > > > -- > Central West End Linux Users Group (via Google Groups) > Main page: http://www.cwelug.org > To post: [email protected] > To subscribe: [email protected] > To unsubscribe: [email protected] > More options: http://groups.google.com/group/cwelug -- Central West End Linux Users Group (via Google Groups) Main page: http://www.cwelug.org To post: [email protected] To subscribe: [email protected] To unsubscribe: [email protected] More options: http://groups.google.com/group/cwelug
