On Thu, Jul 5, 2018 at 7:18 PM Jeffrey Lane <j...@canonical.com> wrote:
> On Thu, Jul 5, 2018 at 5:07 AM, Sandro Bureca <sbur...@gmail.com> wrote:
> > For linux the following command can be used:
> >
> > cat /sys/class/net/eth0/statistics/rx_packets
> > cat /sys/class/net/eth0/statistics/tx_packets
>
> Or you could just do this:
>
> watch -n1 netstat -ni
>
> Also, if you're looking to see what cores are being hammered during
> processing:
>
> cat /proc/interrupts and look for lines matching your device (if present):
>
> 139: 37 0 0 0 0
> 0 4605821 0 IR-PCI-MSI 1048576-edge enp2s0
> 140: 0 2328 0 0 42268740
> 0 0 0 IR-PCI-MSI 1048577-edge enp2s0-TxRx-0
> 141: 0 0 243 0 0
> 0 0 1650980 IR-PCI-MSI 1048578-edge enp2s0-tx-1
> 142: 0 0 0 8748551 0
> 0 0 0 IR-PCI-MSI 1048579-edge enp2s0-tx-2
> 143: 0 0 0 0 189
> 1341058 0 0 IR-PCI-MSI 1048580-edge
> enp2s0-tx-3
>
> That's for an 8 core Skylake CPU on my desktop.
>
> Something like this will let you see it in 1 second intervals to see
> which core is getting the interrupts during network stuff:
>
> watch -n1 "cat /proc/interrupts | grep enp2s0"
>
> YMMV and all that.
>
Thanks Jeff and Sandro Bureca for the reply.
[ec2-user@ip-172-31-11-0 ~]$ cat /sys/class/net/eth0/statistics/rx_packets
1520936 -> Does it mean 1520936 packets? if it reports 1 does it mean 1
packet?
[ec2-user@ip-172-31-11-0 ~]$ cat /sys/class/net/eth0/statistics/tx_packets
1135781 -> Does it mean 1135781 packets? if it reports 1 does it mean 1
packet?
[ec2-user@ip-172-31-11-0 ~]$
watch -n1 netstat -ni
Every 1.0s: netstat -ni
Thu Jul 5 14:26:03 2018
Kernel Interface table
Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0 9001 1520859 0 0 0 1135669 0 0 0 BMRU
lo 65536 2898393 0 0 0 2898393 0 0 0 LRU
watch -n1 "cat /proc/interrupts | grep eth0"
Every 1.0s: cat /proc/interrupts | grep eth0
Thu Jul 5 14:25:29 2018
97: 161 0 0 0 1885854 0
0 0 xen-pirq-msi-x eth0-TxRx-0
98: 201 0 0 0 0 1613325
0 0 xen-pirq-msi-x eth0-TxRx-1
99: 54 0 0 0 0 0
0 0 xen-pirq-msi-x eth0
I look forward to hearing from you. How do i decide how many CPU cores i
need? Is there a thumb rule or any calculation to select AWS Instance for
example. Currently i have selected AWS t2.large instance type as per
https://aws.amazon.com/ec2/instance-types/ to set up Openswan IPsec VPN
tunnel without any basis. Correct me if i am wrong?
I look forward to hearing from you
Best Regards,
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