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I'd like to verify whether my server set Hyper-threading, and the way to it.

lscpu shows Thread per core is "2"

sudo dmidecode shows HTT (Multi-threading).

I expected HTT (Hyper-threading technology), if Hyper-threading is enabled.

Please let me know to check Hyper-threading state and to make enable Hyper-threading.

And lshw -c network is different capacity 1Gbit/s with ethtool eth0 10GB/s Why are those different? how to know correct network bandwidth? Regards,

Hans Lee
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cat /proc/cpuinfo |grep 'cpu cores' -- gives you number of real cores available

cat /proc/cpuinfo |grep processor |wc -l -- gives you number of 'fake' cores

If the numbers are the same, then you don't have HT enabled. this may not work on newer AMD processors but does on all manner of Intel processors from Xeon to i5

Enabling HT depends on your server/motherboard/bios settings.

Your network card speeds are a mixed bag - you should provide a screen dump. Best guess, your network card is 10Gbit capable, but your network is not. It could be a switch that is not capable or connecting cable, or other.

sergtech
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  • Thanks for your reply. lshw -c network shows network0~1 >> Product : Solarflare Communications, capacity 1Gbit/s, logical name : eth0~1, and network0~4 >> Product: NetXtreme BCM5719 GIGABIT ETHERNET PCIe, capacity 1Gbit/s, logical name : em0~4. and I benchmark with another server 7Gbits/sec by iperf -c server1 -t 30. How is it possible? The device specification tell capacity 1Gbps – Hans Lee Nov 05 '17 at 07:42
  • There is insufficient information in your reply to make an informed comment. Most likely scenario is that there is a virtual interface where channel bonding has been set up among physical adapters? Although your BCM card should only be able to handle ~4Gbps using its quad port... – sergtech Nov 06 '17 at 10:24