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Ubuntu 14.04 Interrupts
I haven't had this problem on any server until this point so hopefully someone can point me in the right direction.
I seem to be getting interrupts:
%Cpu0 : 0.3 us, 2.3 sy, 0.0 ni, 89.0 id, 1.3 wa, 7.0 hi, 0.0 si, 0.0 st
%Cpu1 : 0.3 us, 0.7 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu2 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu3 : 0.0 us, 2.0 sy, 0.0 ni, 95.3 id, 0.0 wa, 2.7 hi, 0.0 si, 0.0 st
Depending on traffic, it'll increase to 15%.
CPU0 CPU1 CPU2 CPU3
0: 48 0 0 0 IO-APIC-edge timer
1: 1 0 1 1 IO-APIC-edge i8042
7: 0 0 0 0 IO-APIC-edge parport0
8: 1 0 0 0 IO-APIC-edge rtc0
9: 0 0 0 0 IO-APIC-fasteoi acpi
12: 2 0 1 2 IO-APIC-edge i8042
16: 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb5
18: 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb4
19: 0 0 0 0 IO-APIC-fasteoi uhci_hcd:usb3
23: 7 10 7 3 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
41: 28621 979 6698 1038 PCI-MSI-edge ahci
42: 3236270 2467 1524 315 PCI-MSI-edge eth0-rx-0
43: 60 79 396 9591571 PCI-MSI-edge eth0-tx-0
44: 0 0 1 1 PCI-MSI-edge eth0
45: 0 0 0 0 PCI-MSI-edge gma500
NMI: 149 33 30 103 Non-maskable interrupts
LOC: 110766 40366 32742 21230 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 149 33 30 103 Performance monitoring interrupts
IWI: 5158 8186 4442 4452 IRQ work interrupts
RTR: 0 0 0 0 APIC ICR read retries
RES: 32433 47763 22318 20554 Rescheduling interrupts
CAL: 5685 1806 2042 2169 Function call interrupts
TLB: 388 774 379 889 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: 9 9 9 9 Machine check polls
ERR: 0
MIS: 0
ifconfig:
RX packets:4552974 errors:0 dropped:0 overruns:0 frame:0
TX packets:10551267 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:316943877 (316.9 MB) TX bytes:15765191401 (15.7 GB)
Interrupt:16 Memory:d0400000-d0420000
Any suggestions? Is it a duplex problem on eth0? Kernel problem?
Thank you!
Comments
High packet count can lead to softirq storms that can stress the server, the traffic is not big but can have 100k pps within 15 GB a day. What is the output of atop?
Hey Maounique,
Appreciate the reply. I have since reinstalled the system with a new image thinking the kernel was all outa whack. The system was just setup, with 700 GB of data transferred to it until I noticed this problem. Annoying.
This server would have done a little more than 15GB of data /day. Haha... the port would have been capped most of the day. I feel better about my decision to start fresh. Thank you Maounique, you're always very helpful.
When you folks moving iwstack to the US?
iwstack is already in us in a testing/reduced kind of way (ssd local storage instead of SAN, so not redundancy, no virtual router, firewall on ipv4 on by default (blocks everything, need to open each and every thing you need including icmp). You can choose the zone in the main ui.
Salvatore is working to a whmcs plugin to control the instances and avoid the usual pitfalls for people not accustomed with the ui.