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Date:      Wed, 25 Mar 2009 13:12:29 +0200
From:      Eugene L Kovalenja <qwe@qwe.net.ua>
To:        freebsd-ipfw@freebsd.org
Subject:   Re: FreeBSD 7.0: dummynet 99% cpu
Message-ID:  <49CA119D.7090304@qwe.net.ua>
In-Reply-To: <20090325082925.GA13280@lath.rinet.ru>
References:  <200903181022.n2IAMsWs038026@lurza.secnetix.de>	<49C310A9.6020102@qwe.net.ua> <20090325082925.GA13280@lath.rinet.ru>

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Oleg Bulyzhin пишет:
> On Fri, Mar 20, 2009 at 05:42:33AM +0200, Eugene L Kovalenja wrote:
>   
>> Oliver Fromme ?????:
>>     
>>> Eugene L Kovalenja wrote:
>>>  > FreeBSD *** 7.0-RELEASE FreeBSD 7.0-RELEASE #6: Sun Nov 23 14:32:31 EET
>>>  > [...]
>>>  > Time in three days traffic via ipfw doesn't go. In top:
>>>  >    21 root         1 -44    -     0K     8K WAIT   7   2:15  99.02% dummynet
>>>  > (this is example, not copy\paste)
>>>
>>> There are a few problems that have been fixed (or worked
>>> around) after the release of 7.0.  For example, look at
>>> PR kern/113548 which has a work-around in 7.1.  Your
>>> problem description sounds like it could be caused by
>>> the same problem.
>>>
>>> Therefore I recommend you update to 7.1 or 7-stable.
>>>
>>> Best regards
>>>    Oliver
>>>
>>>   
>>>       
>> Hello.
>>
>> System updated to:
>> [root@taurus /usr/home/qwe]# uname -a
>> FreeBSD *** 7.1-RELEASE-p3 FreeBSD 7.1-RELEASE-p3 #0: Thu Mar 19 
>> 16:31:53 EET 2009 root@***:/usr/obj/usr/src/sys/QWEKRN70 i386
>>
>> but once trouble has repeated (30 mins ago).
>>
>>
>> After that I change my sysctl variables:
>> net.inet.ip.dummynet.io_fast=1
>> net.inet.ip.dummynet.debug=1
>> net.inet.ip.dummynet.hash_size=16384 (from 512)
>>
>> What can I'll to do?
>>
>> Sorry for my bad English :(
>> _______________________________________________
>> freebsd-ipfw@freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw
>> To unsubscribe, send any mail to "freebsd-ipfw-unsubscribe@freebsd.org"
>>     
>
> Please do the following (when dummynet will hang next time):
> 1) Grab the output of follwing commands:
> sysctl net.inet.ip.dummynet
> ipfw pipe show
> 2) wait a bit (30 seconds should be enough)
> 3) do 1) once again.
>
> Examining counters may help in understanding problem.
>
>   
before:

sysctl net.inet.ip.dummynet
net.inet.ip.dummynet.debug: 0
net.inet.ip.dummynet.pipe_byte_limit: 1048576
net.inet.ip.dummynet.pipe_slot_limit: 100
net.inet.ip.dummynet.io_pkt_drop: 14138
net.inet.ip.dummynet.io_pkt_fast: 610276
net.inet.ip.dummynet.io_pkt: 1789875
net.inet.ip.dummynet.io_fast: 1
net.inet.ip.dummynet.tick_lost: 0
net.inet.ip.dummynet.tick_diff: -891
net.inet.ip.dummynet.tick_adjustment: 9797
net.inet.ip.dummynet.tick_delta_sum: 449
net.inet.ip.dummynet.tick_delta: 0
net.inet.ip.dummynet.red_max_pkt_size: 1500
net.inet.ip.dummynet.red_avg_pkt_size: 512
net.inet.ip.dummynet.red_lookup_depth: 256
net.inet.ip.dummynet.max_chain_len: 16
net.inet.ip.dummynet.expire: 1
net.inet.ip.dummynet.search_steps: 1798977
net.inet.ip.dummynet.searches: 1788798
net.inet.ip.dummynet.extract_heap: 0
net.inet.ip.dummynet.ready_heap: 48
net.inet.ip.dummynet.curr_time: 138355446
net.inet.ip.dummynet.hash_size: 512

ipfw pipe show | grep -v ip

01241: 2.048 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01122: 4.096 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
00801: 9.000 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01242: 2.048 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01212: 256.000 Kbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01121: 4.096 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01091: 512.000 Kbit/s 0 ms 50 sl. 46 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00802: 9.000 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01211: 256.000 Kbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01092: 512.000 Kbit/s 0 ms 50 sl. 45 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00701: 9.000 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
00821: 9.000 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00791: 9.000 Mbit/s 0 ms 50 sl. 5 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01111: 2.048 Mbit/s 0 ms 50 sl. 5 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00822: 9.000 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01231: 1.024 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01072: 1.024 Mbit/s 0 ms 50 sl. 3 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00702: 9.000 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01251: 1.024 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01232: 1.024 Mbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01112: 2.048 Mbit/s 0 ms 50 sl. 5 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01071: 1.024 Mbit/s 0 ms 50 sl. 3 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00811: 9.000 Mbit/s 0 ms 50 sl. 2 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00792: 9.000 Mbit/s 0 ms 50 sl. 5 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01221: 512.000 Kbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01202: 128.000 Kbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01101: 1.024 Mbit/s 0 ms 50 sl. 18 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01082: 256.000 Kbit/s 0 ms 50 sl. 18 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00812: 9.000 Mbit/s 0 ms 50 sl. 2 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00722: 9.000 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01252: 1.024 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01222: 512.000 Kbit/s 0 ms 50 sl. 1 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01201: 128.000 Kbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail
01102: 1.024 Mbit/s 0 ms 50 sl. 16 queues (512 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0xffffffff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
01081: 256.000 Kbit/s 0 ms 50 sl. 19 queues (512 buckets) droptail
mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes 
Pkt/Byte Drp
00721: 9.000 Mbit/s 0 ms 50 sl. 0 queues (512 buckets) droptail

after:
sysctl net.inet.ip.dummynet
net.inet.ip.dummynet.debug: 0
net.inet.ip.dummynet.pipe_byte_limit: 1048576
net.inet.ip.dummynet.pipe_slot_limit: 100
net.inet.ip.dummynet.io_pkt_drop: 15177
net.inet.ip.dummynet.io_pkt_fast: 634143
net.inet.ip.dummynet.io_pkt: 1873018
net.inet.ip.dummynet.io_fast: 1
net.inet.ip.dummynet.tick_lost: 0
net.inet.ip.dummynet.tick_diff: -884
net.inet.ip.dummynet.tick_adjustment: 9803
net.inet.ip.dummynet.tick_delta_sum: 320
net.inet.ip.dummynet.tick_delta: -1
net.inet.ip.dummynet.red_max_pkt_size: 1500
net.inet.ip.dummynet.red_avg_pkt_size: 512
net.inet.ip.dummynet.red_lookup_depth: 256
net.inet.ip.dummynet.max_chain_len: 16
net.inet.ip.dummynet.expire: 1
net.inet.ip.dummynet.search_steps: 1882134
net.inet.ip.dummynet.searches: 1871939
net.inet.ip.dummynet.extract_heap: 0
net.inet.ip.dummynet.ready_heap: 48
net.inet.ip.dummynet.curr_time: 138373128
net.inet.ip.dummynet.hash_size: 512

dummynet cpu load now - 56%



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