netdev - Re: limited network bandwidth with 3.2.x kernels

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Message-ID: <1329292820.2555.47.camel@edumazet-laptop>
Date:	Wed, 15 Feb 2012 09:00:20 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Bill Fink <billfink@...dspring.com>
Cc:	Neal Cardwell <ncardwell@...gle.com>, alekcejk@...glemail.com,
	netdev@...r.kernel.org
Subject: Re: limited network bandwidth with 3.2.x kernels

Le mercredi 15 février 2012 à 02:52 -0500, Bill Fink a écrit :

> Would it be useful to check if there was any difference in
> TCP parameters between the 3.1 and 3.2 kernels by performing
> the following on each:
> 
> 	grep . /sys/module/tcp_*/parameters/*
> 
> 					-Bill

I did yesterday and found nothing interesting.

# diff SYSCTL1 SYSCTL2
13a14
> kernel.sched_cfs_bandwidth_slice_us = 5000
18c19
< kernel.tainted = 513
---
> kernel.tainted = 4609
33c34
< kernel.threads-max = 48402
---
> kernel.threads-max = 48398
35c36
< kernel.random.entropy_avail = 2200
---
> kernel.random.entropy_avail = 1715
38,39c39,40
< kernel.random.boot_id = da6427fc-eb8e-40a8-8809-8cae94a65fb5
< kernel.random.uuid = 118c4362-a2a2-4973-ab3e-a09a0ed306ff
---
> kernel.random.boot_id = 2f77031a-9e65-4358-9c02-09058831507a
> kernel.random.uuid = 44cdd730-9c00-4a85-87c3-0a5b1c7c1278
52a54
> kernel.cap_last_cap = 35
102,103c104,105
< kernel.osrelease = 2.6.41.10-3.fc15.i686
< kernel.version = #1 SMP Mon Jan 23 15:44:18 UTC 2012
---
> kernel.osrelease = 2.6.42.3-2.fc15.i686
> kernel.version = #1 SMP Thu Feb 9 01:39:19 UTC 2012
111c113
< kernel.msgmni = 1675
---
> kernel.msgmni = 1674
116c118
< kernel.pty.nr = 2
---
> kernel.pty.nr = 3
152,155c154,157
< fs.inode-nr = 9875	61
< fs.inode-state = 9875	61	0	0	0	0	0
< fs.file-nr = 7328	0	309733
< fs.file-max = 309733
---
> fs.inode-nr = 23853	1607
> fs.inode-state = 23853	1607	0	0	0	0	0
> fs.file-nr = 6112	0	309720
> fs.file-max = 309720
157c159
< fs.dentry-state = 9913	1327	45	0	0	0
---
> fs.dentry-state = 27730	17922	45	0	0	0
168c170
< fs.epoll.max_user_watches = 337762
---
> fs.epoll.max_user_watches = 337644
272c274
< net.netfilter.nf_conntrack_count = 62
---
> net.netfilter.nf_conntrack_count = 26
284,285c286,287
< net.core.wmem_default = 114688
< net.core.rmem_default = 114688
---
> net.core.wmem_default = 163840
> net.core.rmem_default = 163840
301d302
< net.ipv4.route.gc_interval = 60
601c602
< net.ipv6.conf.all.regen_max_retry = 5
---
> net.ipv6.conf.all.regen_max_retry = 3
630c631
< net.ipv6.conf.default.regen_max_retry = 5
---
> net.ipv6.conf.default.regen_max_retry = 3
659c660
< net.ipv6.conf.lo.regen_max_retry = 5
---
> net.ipv6.conf.lo.regen_max_retry = 3
688c689
< net.ipv6.conf.eth0.regen_max_retry = 5
---
> net.ipv6.conf.eth0.regen_max_retry = 3


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