krassi at bulinfo.net
Thu Apr 19 11:12:52 UTC 2007
Robert Watson wrote:
> On Thu, 19 Apr 2007, Krassimir Slavchev wrote:
>> The problem is when I try to access ftp servers, the connection
>> stalls randomly. Also I can't do cvsup and fetch. This happens only
>> with machines running -current and when the traffic is passed through
>> router based on FreeBSD 4.4. One of the test machines is my notebook
>> which have installed 7.0-CURRENT (from today) and 5.4-STABLE and I
>> see this problem only with -current.
>> Is there any new features in -current tcp stack which may be
>> incompatible with FreeBSD 4.x?
> No, not in principle, and ideally also not in practice.
> Sounds like a bit more diagnosis is needed, though. The first thing
> we should try to determine if this is a problem with a device driver,
> the network stack, or applications.
> If you run ping on one terminal to the local router, does it
> experience problems at the same time as other applications? I.e.,
> does ftp stallage align with ping stallage?
No, ping continues.
I have made tests with 'mrt' and nothing.
> Are there any console messages suggesting driver problems, such as
> messages about interrupts, timeouts, and so on?
No, all seems to be normal.
> If you run "vmstat -i", is there any device with an extraordinarily
> high interrupt rate (second column over 10000 or so)?
7.0-CURRENT on HP nx9010:
interrupt total rate
irq0: clk 226314 992
irq1: atkbd0 650 2
irq6: fdc0 11 0
irq8: rtc 29037 127
irq9: acpi0 2108 9
irq10: fwohci0+++ 456 2
irq12: psm0 1501 6
irq14: ata0 1863 8
irq15: ata1 57 0
Total 261997 1149
sis0: <NatSemi DP8381 10/100BaseTX> port 0x2400-0x24ff mem
0xd4008000-0xd4008fff irq 10 at device 18.0 on pci0
sis0: Silicon Revision: DP83816A
miibus0: <MII bus> on sis0
ukphy0: <Generic IEEE 802.3u media interface> PHY 0 on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
sis0: Ethernet address: 00:0f:20:26:6e:78
The 'vmstat -i' does not show anything about sis0!?
7.0-CURRENT on arm board with the same problem:
# vmstat -i
interrupt total rate
irq1: at91_pio0 25079 100
irq10: at91_mci0 70116 281
irq24: ate0 218 0
irq13: at91_spi0 6 0
Total 95419 383
ate0: <EMAC> mem 0xdffbc000-0xdffbffff irq 24 on atmelarm0
miibus0: <MII bus> on ate0
rlphy0: <RTL8201L 10/100 media interface> PHY 16 on miibus0
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ate0: Ethernet address: 00:ff:01:00:00:43
> Could you try doing your network tests directly with the local router
> and avoid using the wide area network? This would help avoid having
> wide area issues affect your testing, and also demonstrate whether or
> not you can reproduce it in a purely local setup (much easier to debug).
Yes. There are problems with HTTP traffic through this router too.
lynx dies with:
Sending HTTP request.
HTTP request sent; waiting for response.
Alert!: Unexpected network read error; connection aborted.
Can't Access `http://mysite.com/'
Alert!: Unable to access document.
Some pages loaded like apache server default page!?
Also icq works!?
May be it depends on the packet size but decreasing MTU to 1400 doesn't
I can't repeat the problem with my local ftp servers.
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
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