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What does high si mean on a FW Worker core?

Question asked by Phillip Runner on Feb 4, 2019
Latest reply on Feb 14, 2019 by Phillip Runner

Timothy Hall, I have an Open Server (R80.10) that has a 4 core license on it.  I've set CoreXL to consume 2 cores, and SND to 2 cores.  What does it mean when the FW Worker cores are using a high % of si in the top output?  I thought si was typically only seen in SND cores for taking traffic off of network interfaces?

 

This FW is running just the FW blade, and 94% of packets are accelerated.

 

Interfaces eth0 and eth2 are bonded together, and eth1 and eth3 are bonded together (all 10G interfaces)

 

For example:

 

[Expert@fw1:0]# fw ctl affinity -l
eth3: CPU 0
eth2: CPU 1
eth1: CPU 0
eth0: CPU 1
eth6: CPU 0
eth4: CPU 1
Kernel fw_0: CPU 3
Kernel fw_1: CPU 2
Daemon mpdaemon: CPU 2 3
Daemon wsdnsd: CPU 2 3
Daemon fwd: CPU 2 3
Daemon in.geod: CPU 2 3
Daemon lpd: CPU 2 3
Daemon in.asessiond: CPU 2 3
Daemon cpd: CPU 2 3
Daemon cprid: CPU 2 3
The current license permits the use of CPUs 0, 1, 2, 3 only.

 

[Expert@fw1:0]# top
top - 21:05:07 up 27 min, 1 user, load average: 1.73, 1.51, 1.37
Tasks: 178 total, 3 running, 175 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 76.3%id, 0.0%wa, 2.0%hi, 21.7%si, 0.0%st
Cpu1 : 0.0%us, 0.0%sy, 0.0%ni, 91.7%id, 0.0%wa, 1.3%hi, 7.0%si, 0.0%st
Cpu2 : 2.7%us, 1.7%sy, 0.0%ni, 52.7%id, 0.0%wa, 0.0%hi, 43.0%si, 0.0%st
Cpu3 : 2.3%us, 2.0%sy, 0.0%ni, 51.5%id, 1.3%wa, 0.0%hi, 42.9%si, 0.0%st
<removed extra unused cores at 100% idle>
Mem: 16262312k total, 5321028k used, 10941284k free, 52204k buffers
Swap: 17824108k total, 0k used, 17824108k free, 1995872k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5703 admin 15 0 0 0 0 R 43 0.0 11:00.16 fw_worker_1
5702 admin 15 0 0 0 0 R 43 0.0 10:45.52 fw_worker_0
7249 admin 15 0 591m 104m 40m S 7 0.7 1:48.70 fw_full
6696 admin 15 0 2884 1580 1320 S 0 0.0 0:06.24 netflowd
18626 admin 15 0 2244 1136 832 R 0 0.0 0:00.03 top
1 admin 15 0 1972 720 624 S 0 0.0 0:03.51 init

 

[Expert@fw1:0]# fwaccel stats -s
Accelerated conns/Total conns : 97389/109164 (89%)
Accelerated pkts/Total pkts : 66910366/70502200 (94%)
F2Fed pkts/Total pkts : 2872625/70502200 (4%)
PXL pkts/Total pkts : 719209/70502200 (1%)
QXL pkts/Total pkts : 0/70502200 (0%)

 

Thanks for any insight you can provide as to what may be going on here.

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