Date: Thu, 23 Dec 1999 13:03:30 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Bill Paul <wpaul@skynet.ctr.columbia.edu>, julian@whistle.com, scottm@CS.UCLA.EDU, jlemon@americantv.com, brad@shub-internet.org, jabley@patho.gen.nz, phk@critter.freebsd.dk, wollman@khavrinen.lcs.mit.edu, current@FreeBSD.ORG Subject: Re: Woa! May have found something - 'rl' driver and small packets (was Re: Odd TCP glitches in new currents) Message-ID: <199912232103.NAA07664@apollo.backplane.com> References: <199912231930.OAA11526@skynet.ctr.columbia.edu> <199912232032.MAA07521@apollo.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Heh heh. Sorry about this, I believe I have further information on
another older problem. Bill, remember those ethernet lockups I was
having with the 'xl' driver all those months ago that we could never
track down?
Well, they happen with the 'dc' driver too. But this time I'm not getting
a complete lockup. The network actually continues to work well enough,
well, just barely well enough, that I can still use it. slowly.
It appears that the 'dc' driver continues to take receive interrupts
(see the systat -vm snapshot at the end), but winds up not processing
any of the packets. Except when 64 packets accumulate then suddenly all
64 get processed all at once! Then nothing again until the next 64
accumulate.
This netstat is on the machine with the 'dc' driver that locked up, when
I ping it from another machine. The 'dc' driver still works--- barely.
It doesn't processes any packets until 64 have been received, then it
processes them all at once. The transmit side appears to work fine and
the receive side appears to get interrupts but does not appear to process
incoming packets. Yet, obviously, the packets are being accumulated
somewhere because I don't have any packet loss, just incredibly long and
odd ping times.
This occurs when I am running netscape on the same box over a remote X
connection (read: Lots of packets going over the network plus lots of
local PCI activity talking to the graphics card). Same problem occurs
with different graphics adapters but I believe this same problem also
occured with the 'xl' driver on the card I had in before I put this
card in.
dc0: <LC82C115 PNIC II 10/100BaseTX> irq 5 at device 9.0 on pci0
dc0: Ethernet address: 00:a0:cc:69:4e:2d
dc0@pci0:9:0: class=0x020000 card=0xc00111ad chip=0xc11511ad rev=0x25 hdr=0x00
input (Total) output
packets errs bytes packets errs bytes colls
64 0 7188 48 0 4792 0
0 0 0 2 0 332 0
64 0 6962 46 0 4628 0
0 0 0 2 0 348 0
64 0 8268 46 0 4592 0
0 0 0 2 0 348 0
64 0 7704 46 0 4656 0
0 0 0 2 0 332 0
64 0 7228 47 0 4614 0
0 0 0 2 0 332 0
65 0 6972 47 0 4686 0
0 0 0 3 0 522 0
64 0 14472 42 0 4188 0
0 0 0 3 0 422 0
64 0 7724 44 0 4196 0
0 0 0 1 0 134 0
64 0 6768 49 0 4830 0
0 0 0 2 0 332 0
64 0 7440 45 0 4386 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
input (Total) output
When I ping the machine faster from another box:
input (Total) output
packets errs bytes packets errs bytes colls
64 0 6712 50 0 5108 0
64 0 6724 50 0 5132 0
64 0 7948 50 0 5116 0
64 0 6816 48 0 4978 0
64 0 7072 50 0 5208 0
64 0 46144 28 0 3058 0
64 0 37416 31 0 3290 0
64 0 6712 50 0 5108 0
64 0 7004 49 0 4898 0
64 0 6712 46 0 4444 0
64 0 6724 50 0 4724 0
64 0 6432 50 0 4768 0
0 0 0 0 0 0 0
64 0 6432 50 0 4768 0
64 0 6684 50 0 4724 0
64 0 6792 55 0 5554 0
64 0 6876 53 0 5402 0
64 0 6752 52 0 5212 0
64 0 6712 5 1 4622 0
0 0 0 0 0 74 0
0 0 0 0 0 850 0
And watch what happens after I managed to 'ifconfig dc0 media auto',
it goes back to normal... suddenly everything is working properly
again.
input (Total) output
packets errs bytes packets errs bytes colls
0 0 0 0 0 170 0
0 0 0 0 0 170 0
32 0 3992 36 0 2494 0
54 0 5374 53 0 5062 0
57 0 7802 58 0 5456 0
54 0 6236 53 0 5062 0
53 0 5314 53 0 5062 0
53 0 5314 53 0 5062 0
59 0 6318 61 0 5642 0
55 0 5510 58 0 5372 0
53 0 5314 53 0 5062 0
53 0 5314 53 0 5062 0
42 0 4180 44 0 3988 0
10 0 1044 13 0 914 0
7 0 742 9 0 566 0
11 users Load 0.00 0.01 0.00 Thu Dec 23 12:50
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 19324 3876 31956 5456 30252 count
All 63628 4180 2785500 5824 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 284 total
1 20 54 1 295 284 38 6 13024 wire 40 dc0 irq11
42892 act ata-pci0 i
0.8%Sys 0.8%Intr 0.8%User 0.0%Nice 97.7%Idl 7664 inact fdc0 irq6
| | | | | | | | | | 48 cache atkbd0 irq
+ 30204 free ppc0 irq7
daefr 16 mse0 irq3
Namei Name-cache Dir-cache prcfr 100 clk irq0
Calls hits % hits % react 128 rtc irq8
1 1 100 pdwake
zfod pdpgs
Disks acd0 fd0 ofod intrn
KB/t 0.00 0.00 %slo-z 6176 buf
tps 0 0 tfree 1 dirtybuf
MB/s 0.00 0.00 6908 desiredvnodes
% busy 0 0 610 numvnodes
25 freevnodes
11 users Load 0.15 0.05 0.01 Thu Dec 23 12:51
Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
Tot Share Tot Share Free in out in out
Act 19816 3876 32700 5456 30240 count
All 63640 4180 2785500 5824 pages
Interrupts
Proc:r p d s w Csw Trp Sys Int Sof Flt cow 273 total
22 103 1 667 273 67 6 13024 wire 29 dc0 irq11
42904 act ata-pci0 i
0.0%Sys 0.0%Intr 3.1%User 0.0%Nice 96.9%Idl 7664 inact fdc0 irq6
| | | | | | | | | | 48 cache atkbd0 irq
>> 30192 free ppc0 irq7
daefr 16 mse0 irq3
Namei Name-cache Dir-cache prcfr 100 clk irq0
Calls hits % hits % react 128 rtc irq8
pdwake
zfod pdpgs
Disks acd0 fd0 ofod intrn
KB/t 0.00 0.00 %slo-z 6176 buf
tps 0 0 tfree 1 dirtybuf
MB/s 0.00 0.00 6908 desiredvnodes
% busy 0 0 610 numvnodes
25 freevnodes
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199912232103.NAA07664>