dummynet: waking up pipe

[Luigi Rizzo]

On Fri, Jan 22, 2010 at 04:10:26PM +0300, Evgenii Davidov wrote:
> ????????????,
> 
> On Tue, Jan 12, 2010 at 02:05:39PM +0300, Evgenii Davidov ?????:
> 
> > hello
> > 
> > when i enable net.inet.ip.dummynet.debug i get a lot of:
> > 
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 1380 at 1460
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 2931 at 40
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 5189 at 40
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 4562 at 112
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 3610 at 51
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 597 at 40
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 1380 at 1400
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 1445 at 99
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 3610 at 51
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 3610 at 40
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 597 at 40
> > Jan 12 13:53:32 r2 kernel: dummynet: waking up pipe 218 at 1500
> > 
> > is it bad?

this is just a debug message so ignore it.

> > let's see 3610:
> > 
> > ipfw pipe 3610 config bw 10500Kbit/s
> > ipfw queue 3610 config pipe 3610 mask dst-ip 0xffffffff
> > ipfw table 80 add 10.168.167.227 3610
> > ipfw table 80 add 89.222.187.184 3610
> > 
> > 00040   8708035   7887386208 queue tablearg ip from any to table(80) out via bge1
> > 00050  44793529  40386675667 pipe tablearg ip from any to table(2) out via bge1
> > 00070   8006000   3713846496 pipe 16 ip from table(16) to any in via bge1
> > 00071  68767107  23673242157 pipe 5 ip from not table(16) to any in via bge1
> > 
> > ipfw pipe 3610 show
> > 
> > 03610:  10.500 Mbit/s    0 ms   50 sl. 0 queues (1 buckets) droptail
> > q03610: weight 1 pipe 3610   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
> >   5 ip           0.0.0.0/0      10.10.187.184/0     639563 40272017  0    0   0
> > 
> > my problem is that dummynet cpu usage jumps from 0 to 99%:
> > 
> >    33 root        1 -68    -     0K     8K -       1 512.6H 86.18% dummynet
> >    33 root        1 -68    -     0K     8K -       1 512.6H 85.89% dummynet
> >    33 root        1 -68    -     0K     8K -       1 512.6H 88.28% dummynet
> >    33 root        1 -68    -     0K     8K -       0 512.6H 78.17% dummynet
> >    33 root        1 -68    -     0K     8K -       0 512.6H  0.88% dummynet
> >    33 root        1 -68    -     0K     8K -       1 512.6H  0.10% dummynet
> >    33 root        1 -68    -     0K     8K -       1 512.7H  0.00% dummynet
> >    33 root        1 -68    -     0K     8K -       1 512.7H  0.10% dummynet

i am not too clear on why this happens -- there shuold be only
one instance of the dummynet thread, not 8 as in your case.

cheers
luigi