Dear List,
on our machines with about 40 vservers we observe low network
throughput. It seems to scale inversely with the number of vms on the
respective node:
# vms bw (Mbps)
----- ---------
37 60
24 94
18 174
12 608
5 933
2 934
1 935
The measurements were obtained using iperf from a different physical
machine. It has been suggested that the slowdown may be due to
interrupt 51 being clamped to CPU 12:
# echo '::interrupts -d' | mdb -k
IRQ Vect IPL Bus Trg Type CPU Share APIC/INT# Driver Name(s)
:
49 0x40 5 PCI Edg MSI 8 1 - mpt#0
50 0x60 6 PCI Edg MSI 11 1 - e1000g#0
51 0x61 6 PCI Edg MSI 12 1 - e1000g#1
160 0xa0 0 Edg IPI all 0 - poke_cpu
:
If this is the cause of the problem we would like to deliver the
interrupts to all of the cpus. How do we achieve this with smartos?
Kind Regards,
Stefan
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