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Editor: PieterSmit
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Editor: PieterSmit
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== High SI (see top) software interrupts ==
 * See overview in proc, looking for eth0/ena {{{
$ cat /proc/interrupts
           CPU0 CPU1
 26: 77477 0 PCI-MSI 81920-edge ena-mgmnt@pci:0000:00:05.0
 27: 1304 182777451 PCI-MSI 81921-edge eth0-Tx-Rx-0
 28: 970 176892610 PCI-MSI 81922-edge eth0-Tx-Rx-1
}}}

AWS/LinuxNetwork

Check that we are using the ENA addapter

  • use ethtool 

    $ sudo ethtool -i eth0
driver: ena

Check for AWS dropped packets due to overload

  • use ethtool 

    $ sudo ethtool -S eth0 | grep "drop\|buffer\|miss\|exceeded"
     bw_in_allowance_exceeded: 330628747
     bw_out_allowance_exceeded: 101
     pps_allowance_exceeded: 0
     conntrack_allowance_exceeded: 0
     linklocal_allowance_exceeded: 0
     queue_0_tx_llq_buffer_copy: 0
     queue_0_tx_missed_tx: 0
     queue_1_tx_llq_buffer_cop

High SI (see top) software interrupts

  • See overview in proc, looking for eth0/ena 

    $ cat /proc/interrupts
           CPU0       CPU1
 26:      77477          0   PCI-MSI 81920-edge      ena-mgmnt@pci:0000:00:05.0
 27:       1304  182777451   PCI-MSI 81921-edge      eth0-Tx-Rx-0
 28:        970  176892610   PCI-MSI 81922-edge      eth0-Tx-Rx-1

AWS/LinuxNetwork (last edited 2022-05-05 00:30:54 by PieterSmit)