Hi All,
I have some doubts , please clear me.
Query 1 ) should we set irq afinity of pci lan interface or onboard lan
interface or we can do for both ?
Query 2) H/w must be APIC enabled and for them only we can do set irq
afinity , is it so?
Query 3) What are the root cause for packet loss on interface ?
Actually in one of my server , i m having strange result, i can not see
any value update for lan interface in interrupts.
cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 124 0 0 78 IO-APIC-edge timer
1: 0 0 0 614 IO-APIC-edge i8042
8: 0 0 0 1 IO-APIC-edge rtc0
9: 0 0 0 0 IO-APIC-fasteoi acpi
12: 0 0 0 159 IO-APIC-edge i8042
19: 0 13411 0 0 IO-APIC-fasteoi
ata_piix, ata_piix
21: 0 0 70 0 IO-APIC-fasteoi
ehci_hcd:usb1
23: 0 0 32 0 IO-APIC-fasteoi
ehci_hcd:usb2
40: 229974 0 0 0 HPET_MSI-edge hpet2
41: 0 85867 0 0 HPET_MSI-edge hpet3
42: 0 0 73987 0 HPET_MSI-edge hpet4
43: 0 0 0 106848 HPET_MSI-edge hpet5
45: 0 0 0 0 PCI-MSI-edge
aerdrv, PCIe PME
46: 0 0 0 0 PCI-MSI-edge
aerdrv, PCIe PME
47: 0 0 0 0 PCI-MSI-edge
PCIe PME
48: 0 0 0 0 PCI-MSI-edge
PCIe PME
49: 0 0 0 0 PCI-MSI-edge
PCIe PME
50: 0 0 0 219714 PCI-MSI-edge
51: 10880 0 0 0 PCI-MSI-edge
_ 52: 4 0 0 0 PCI-MSI-edge em1_
NMI: 44 16 8 29 Non-maskable interrupts
LOC: 282 248 158 68 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 44 16 8 29 Performance
monitoring interrupts
IWI: 0 0 0 0 IRQ work interrupts
RES: 6283 2718 2153 5353 Rescheduling interrupts
CAL: 128 100 228 278 Function call interrupts
TLB: 15 33 12 22 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 78 78 78 78 Machine check polls
ERR: 0
MIS: 0
em1 is my lan interface.
ifconfig
em1 Link encap:Ethernet HWaddr 00:25:90:0A:E6:A2
inet addr:192.168.100.152 Bcast:192.168.100.255
Mask:255.255.255.0
inet6 addr: fe80::225:90ff:fe0a:e6a2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:216457 errors:0 _dropped:16064_ overruns:0 frame:0
TX packets:12715 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:36976063 (35.2 MiB) TX bytes:2391031 (2.2 MiB)
_Interrupt:16_ Memory:fb5e0000-fb600000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
But i can not see any 16 irq no. in cat /proc/interrupts.
I tried to increase rx and tx for em1 but still same i m having packet
loss on interface.
OS : fedora 15 64 bit.
04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network
Connection
05:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network
Connection
Kernel : 2.6.40.6-0.fc15.x86_64
Please guide me to solve this issues and resolve my queries.
Warm Regards,
Benjamin
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