Slow browsing with *some* pages in linux only

breakerfall

Hey.. up until a few weeks ago, browsing was fine in linux but now, some pages take ages to load... downloading information a bytes a second. I know it's not the ISP at fault as I can browse these pages at full speed with other machines on the network and with windows too. I believe the problem may have started after an emerge world a while back.

At first, I thought that it was only a mozilla problem (was sure konqueror was fine) but now it seems that konqueror suffers the same problem. Thankfully, it's only very few websites - namely forum based sites (Speedguide.net linuxquestions.org).

My MTU is set to 1500 (which is right for a cable connection). I'm not receiving any collisions or errors and downloading files usually run at full speed of my downstream.

Does anyone have any idea what could be causing this kind of problem?

Thanks

Bombs14 · Tux's lil' helper Joined: 03 Sep 2003 Posts: 140

are you playing music while surfing sites? I know of one case where if you use an older version of flash/shockwave and you go onto one of those flash/shockwave sites while listening to music, it will seem to be stuck until your music stops.

breakerfall · Posted: Wed Aug 25, 2004 10:35 pm Post subject:

I wish the problem was that simple...

The pages eventually load... but it takes quite a long time, unfortunately.

breakerfall · Posted: Thu Aug 26, 2004 12:07 am Post subject:

Anyone?

Any kind of suggestion is appreciated. It's really starting to get to me. And the computer won't like me when it gets to me. :evil:

Is there any kind of file in linux which could cause slower browsing speeds? Anything? I feel silly for causing this to happen in the first place and I'm almost certain that it may have originated from an etc-update.

thumper · Guru Joined: 06 Dec 2002 Posts: 553 Location: Venice FL

Make sure your /etc/resolv.conf has proper entries for nameservers.

I have similar problems with Konqueror, however Mozilla and Mozilla-Firefox are very fast.

I found temporary workaround by installing privoxy (emerge privoxy) and setting it up.

Even in passthru mode, it still has a positive effect, this thread has some info as well: https://forums.gentoo.org/viewtopic.php?t=211449&start=25

George

breakerfall · Posted: Thu Aug 26, 2004 12:18 pm Post subject:

hmmm, it's just frustrating that I didn't have this problem until a few weeks ago

Is there anything else that could be causing this problem? I have a second gentoo box right next to me with mozilla which doesn't have this problem (although it hasn't been updated in quite a while).

Do you know of any particular global config in gentoo which could be causing these slow-down issues with browsing? My resolv.conf file is fine.

Mark Clegg · Posted: Thu Aug 26, 2004 5:43 pm Post subject:

What kernel are you using?

I've got exactly the same problem, with gentoo-dev-2.6.8-r1, I've just rebooted under gentoo-dev-2.6.7-r13 and it's working properly again.

.... need more test results.... any takers?

breakerfall · Posted: Thu Aug 26, 2004 8:04 pm Post subject:

Jeez - I hope that's it. I'm running 2.6.8-r1.. I'll test as soon as I get back home. I just have to run out. I'll test and update this thread. Watch this space.

Oh and thanks for the heads-up, hope you're right

Mark Clegg · Posted: Thu Aug 26, 2004 8:48 pm Post subject:

I've just gone to gentoo-dev-2.6.8-r3 and it's still the same. Last emerge sync has also provided kdelibs-3.2.3-r2 (from r1) and kdenetwork-3.2.3-r1 (from 3.2.3), still to merge

I'm going to try these next....

breakerfall · Posted: Thu Aug 26, 2004 9:33 pm Post subject:

I can now confirm that the problem definately lies with the kernel. I dropped back to the 2.6.7-r13 version and the problem is gone.

Again, thanks and now, what course of action? A bug report perhaps?

Mark Clegg · Posted: Fri Aug 27, 2004 7:47 pm Post subject:

emerged the updated kdelibs and kdenetwork - still the same...

Submitted a bug : https://bugs.gentoo.org/show_bug.cgi?id=61966

breakerfall · Posted: Sun Aug 29, 2004 6:13 pm Post subject:

Thanks for the link - I'll keep tabs on it.

Mark Clegg · Posted: Sun Aug 29, 2004 7:44 pm Post subject:

I've done a packet capture under 2.6.8 and am confused....

local system is 192.168.1.107, remote is 212.250.5.117

devon · l33t Joined: 23 Jun 2003 Posts: 943

I have been seaching the lkml and found some similar issues with 2.6.8. Have you tried the following?

Mark Clegg · Posted: Mon Aug 30, 2004 2:20 pm Post subject:

/me googles a bit....

You mean this

Works for me... thanks Devon.

Sounds a bit like it's a problem when behind certain firewalls, I'm behind a linksys, what about you breakerfall?

Question is, tcp_window_scaling was 1 in 2.6.7 and that worked fine, so why the different behaviour in 2.6.8?

breakerfall · Posted: Mon Aug 30, 2004 4:47 pm Post subject:

gcasillo · Posted: Mon Aug 30, 2004 11:56 pm Post subject:

I just ran into these symptoms last night between 12:00-2:00am. Not sure if I emerged something that caused it, but I had been using the same kernel, 2.6.7-r11, for a long time including today. Most hosts would take 30-60 seconds to finally load in Konqueror. Checking mail took 30-60 seconds when it used to be instantaneous. Called my ISP and confirmed that there wasn't something wrong on their end.

Just updated to 2.6.7-r13. Same problem. Tried the tcp_window_scaling trick (setting it to '0'). No help.

This sucks big time. I have a dozen or so boxes I administer at work, and I hope I don't see this creep into them. I am reluctant to update to 2.6.8 since I ran into scads of problems mainly with SATA disks and CD writers. No thanks as those are important to me.

gcasillo · Posted: Mon Aug 30, 2004 11:58 pm Post subject:

Also, I am behind a Netgear web router and switch.

thumper · Guru Joined: 06 Dec 2002 Posts: 553 Location: Venice FL

gcasillo · Posted: Tue Aug 31, 2004 2:17 am Post subject:

As I stated in that bug report, I can browse with the lynx text-only browser just fine. However, when I try to browse with Konqueror or even Firefox, I experience the problem. I will try that sysctl trick when I return home later.

Ah, I should also note (and will in the bug report too) that I also had a box running 2.6.7-r11 and kde-3.2.3 todya. No problems whatsoever browsing any sites. But as soon as I updated that box to kde-3.3.0 tonight, BAM, delayed web browsing.

I suspect the problem is in kdenetwork-3.3.0 or perhaps kdelibs-3.3.0, but I'm no code tracer.

...and yet, on my laptop (from which I type this), I am running 2.6.7-r13 and kde-3.3.0 and having no problems whatsoever...

What a wreck of a Monday it's been. :cry:

breakerfall · Posted: Tue Aug 31, 2004 2:19 am Post subject:

It seems that we have 2 different problems here.

Your issues may lie with kde whilst mine / Mark Glegg's seems to lie with the latest kernel releases.

thumper · Guru Joined: 06 Dec 2002 Posts: 553 Location: Venice FL

I HAVE SOLVED IT WHOOHOO

https://bugs.gentoo.org/show_bug.cgi?id=62330

If your not using ipv6, kdelibs still tries to do ipv6 lookups first before trying ipv4 lookups.

--with-ipv6-lookup does not appear to be supported in the configure of kdelibs, so for kdelibs having USE="-ipv6" did not do anything.

however adding KDE_NO_IPV6=1
to
/etc/env.d/99kde-env

will fix it, and now sites that would not load, load fast.

Remember, google and grep are your friends.

George

Mark Clegg · Posted: Tue Aug 31, 2004 7:06 am Post subject:

There are definately two different issues here. the IPV6 fix does not fix my problem (and probably breakerfalls), I tried that earlier.

gcasillo · Posted: Tue Aug 31, 2004 9:58 am Post subject:

Mozilla is working for me. Konqueror is not. Additionally, I can't check mail without this long ass delay.

The KDE_NO_IPV6=1 did nothing for me. You may be on to the root of the problem though, thumper. Thanks for offering the tip.

Looks like 3.3.1 should be a pretty quick release, because this is a showstopper. Or do they go the Linux route and call it 3.3.0.1? :roll:

scoobydu · Posted: Tue Aug 31, 2004 10:11 am Post subject:

Same here ... I get very slow updates in firefox with the nitro6 2.5.8.1 kernel, where as 2.6.7ck doesn't give this problem.

I don't have any KDE apps installed at all, with no libs ..... ?!
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