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Message-ID: <4B700EC2.5090207@itcare.pl>
Date: Mon, 08 Feb 2010 14:16:50 +0100
From: Paweł Staszewski <pstaszewski@...are.pl>
To: Linux Network Development list <netdev@...r.kernel.org>
Subject: Problem wit route cache
Hello
From some time i have problem with route cache in linux
this is an info that i have in dmesg:
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
Route hash chain too long!
Adjust your secret_interval!
vlan0811: 9 rebuilds is over limit, route caching disabled
Route hash chain too long!
Adjust your secret_interval!
The problem is that change of net.ipv4.route.secret_interval is change
nothing -- no matter that i set secret_interval from dfault 3600 to 2 or
10000 i have always the same info about route cahce is disabled.
Also i change this parameter net.ipv4.rt_cache_rebuild_count from
default 4 to 9 and the same info - i try also change this to 12 but also
this change nothing.
The machine that have this info is:
2x Intel(R) Xeon(R) CPU X5450 @ 3.00GHz
12GB of RAM
Network controllers are:
04:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
Controller (Copper) (rev 03)
05:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet
Controller
And the weird thing is that i need to set affinity for my nics to "ff"
because when i bind network card to one cpu this cpu have always 100%
Router traffic is about 700Mbit/s RX + 700Mbit/s TX on eth0 (with 2
tagged vlans) and the same traffic on eth1 that is untagged
This traffic is forwarded by this router.
Simple topology:
Clients<- ibgp -> [ vlan0811@...0 + vlan0508@...0 - BGP process - eth1 ]<- ebgp -> Internet Provisers
Some info about fibtrie:
cat /proc/net/fib_triestat
Basic info: size of leaf: 40 bytes, size of tnode: 56 bytes.
Main:
Aver depth: 2.58
Max depth: 6
Leaves: 297506
Prefixes: 312472
Internal nodes: 69968
1: 35673 2: 14840 3: 10980 4: 4729 5: 2315 6: 956 7: 364 8: 109 9: 1 16: 1
Pointers: 570018
Null ptrs: 202545
Total size: 36990 kB
Counters:
---------
gets = 2797832581
backtracks = 149015808
semantic match passed = 2789993308
semantic match miss = 766703
null node hit= 860359377
skipped node resize = 0
Local:
Aver depth: 3.66
Max depth: 4
Leaves: 15
Prefixes: 16
Internal nodes: 11
1: 8 2: 3
Pointers: 28
Null ptrs: 3
Total size: 3 kB
Counters:
---------
gets = 2792656726
backtracks = 2185449412
semantic match passed = 5895311
semantic match miss = 0
null node hit= 818902
skipped node resize = 0
And interrupts
cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
0: 80 21 32 27 38 39 38 34 IO-APIC-edge timer
1: 0 1 0 0 0 0 1 0 IO-APIC-edge i8042
9: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi acpi
14: 0 0 0 0 0 0 0 0 IO-APIC-edge ide0
15: 0 0 0 0 0 0 0 0 IO-APIC-edge ide1
20: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb3
21: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb6
22: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb5
23: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2, uhci_hcd:usb4
29: 73903 136 135 135 134 138 136 136 PCI-MSI-edge ahci
30: 101136854 101509497 101627297 100701508 101684077 101870217 101154425 100604465 PCI-MSI-edge eth0
31: 91772747 92037311 92317341 92231065 91248484 91062342 91778136 92328099 PCI-MSI-edge eth1
32: 0 0 0 0 0 1 1 0 PCI-MSI-edge
33: 0 1 0 0 0 0 0 1 PCI-MSI-edge
34: 0 0 1 0 0 1 0 0 PCI-MSI-edge
35: 1 0 0 1 0 0 0 0 PCI-MSI-edge
36: 0 0 0 0 1 0 0 1 PCI-MSI-edge
37: 1 0 0 0 0 0 1 0 PCI-MSI-edge
38: 0 0 0 1 1 0 0 0 PCI-MSI-edge
39: 0 1 1 0 0 0 0 0 PCI-MSI-edge
NMI: 0 0 0 0 0 0 0 0 Non-maskable interrupts
LOC: 407733660 395964025 431438426 402307801 434522968 420170984 400450633 390318324 Local timer interrupts
SPU: 0 0 0 0 0 0 0 0 Spurious interrupts
PMI: 0 0 0 0 0 0 0 0 Performance monitoring interrupts
PND: 0 0 0 0 0 0 0 0 Performance pending work
RES: 14378 15781 19276 5691 14761 13579 16846 15629 Rescheduling interrupts
CAL: 378 383 92 86 364 354 92 89 Function call interrupts
TLB: 551 577 433 272 602 543 329 683 TLB shootdowns
ERR: 0
MIS: 0
Regards
Pawel
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