Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 11 Apr 2006 15:23:56 -0400 | From | John Heffner <> | Subject | Re: 2.6.17 regression: Very slow net transfer from some hosts |
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Daniel Drake wrote: > Hi, > > Since sometime after 2.6.16, some websites have been very slow to load. > Examples include: > > http://zd1211.ath.cx > http://developer.osdl.org/shemminger/blog/ > http://www.reactivated.net/weblog > > On a good kernel, "wget http://zd1211.ath.cx" says: > 20:23:38 (90.44 KB/s) - `index.html' saved [20895/20895] > > On a bad kernel: > 20:14:18 (327.01 B/s) - `index.html' saved [20895/20895] > > I reproduced this on two different internet connections (same ISP > though). However I cannot reproduce it on my other system. > > git-bisect tracked it down to: > > 7b4f4b5ebceab67ce440a61081a69f0265e17c2a is first bad commit > diff-tree 7b4f4b5ebceab67ce440a61081a69f0265e17c2a (from > 2babf9daae4a3561f3264638a22ac7d0b14a6f52) > Author: John Heffner <jheffner@psc.edu> > Date: Sat Mar 25 01:34:07 2006 -0800 > > [TCP]: Set default max buffers from memory pool size > > Indeed, reverting this patch from 2.6.17-rc1-git4 allows those sites to > load again. > > Any ideas?
I'm not seeing this behavior myself. What are the values of /proc/sys/net/ipv4/tcp_wmem, tcp_rmem, and tcp_mem? How much memory does this system have? (A binary tcpdump might be good, too.)
Thanks, -John
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