[c-nsp] CSR1000V and CPU usage

[Robert Hass]

Hi
I deployed Cisco CSR 1000V as edge router in DataCenter.

My current configuration:
- 2 x Xeon X5650
- just one CSR VM on ESXi host
- ESXi 5.1 with all latest patches
- standard vSwitch with 1 Intel Server NIC
- HT enabled
- 2xSSD in RAID1
- 8GB vRAM
- 4 vCPU
- 1 vNIC with 802.1q VLANs - few VLANs
- 100% reservation for CPU and Memory in ESXi for CSR VM
- 500MB AX license
- running IOS 03.14.01.S / 15.5(1)S1
- configured 802.1q VLANs, routing, BGP routing (2 x full-table), uRPF

Load on this CSR is around 130Mbps @ 72kpps:
#sh int gi1 | inc sec
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
  Keepalive set (10 sec)
  30 second input rate 66790000 bits/sec, 36175 packets/sec
  30 second output rate 66691000 bits/sec, 36108 packets/sec

But I'm VERY worry about CPU usage of process qfp-ucode-csr which is
currently 52%.
It's lower in the morning where we have a lot less traffic (eg. 20Mbps
summary).

#show processes cpu platform sorted | exclude 0%      0%      0%
CPU utilization for five seconds: 16%, one minute: 16%, five minutes: 15%
   Pid    PPid    5Sec    1Min    5Min  Status        Size  Name
--------------------------------------------------------------------------------
 20227   19933     52%     50%     47%  S        820830208  qfp-ucode-csr
     7       2     10%      9%      9%  S                0  sirq-net-rx/0
 14574   14284      2%      1%      1%  S       4007346176  linux_iosd-imag

Which value of CPU utilization is true above ? 52% or 16% ?
What process qfp-ucode-csr is for ? Can it use more than 1 vCPU ?
ESXi shows 3800MHz used from (from total 10,6GHz - 2,66GHz * 4 vCPUs)
Should I worry about qsfp-ucode-csr CPU usage ?

Rob