[ovs-discuss] CPU freqency is not max when running ovs_DPDK

王志克 wangzhike at jd.com
Fri Sep 22 07:34:56 UTC 2017


Hi All,

I am using OVS_DPDK, and the target CPU has running 100%. However, I notice the cpu frequency is NOT exceeding the max value, so the performance may not reach the best value. I have 2 pmd only for now, each is hyper-thread core in one physical core.

I am not sure the reason, and do not get idea after going through the BIOS and googles. Can someone kindly indicate the root cause? I am using centos7.  Appreciate your help.

# cat /sys/devices/system/cpu/cpu4/cpufreq/cpuinfo_cur_freq
2599980                                                   ---------àI expect it would be 3000000
# cat /sys/devices/system/cpu/cpu4/cpufreq/cpuinfo_max_freq
3000000
# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    2
Core(s) per socket:    16
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 79
Model name:            Intel(R) Xeon(R) CPU E5-2683 v4 @ 2.10GHz
Stepping:              1
CPU MHz:               1199.953
BogoMIPS:              4195.88
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              40960K
NUMA node0 CPU(s):     0-15,32-47
NUMA node1 CPU(s):     16-31,48-63


Br,
Wang Zhike
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