ESX4i IBM 46M 1076, Dual Port 1 Gb Ethernet daughter card

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  It turned out that I placed the network card in the pci slot 3 which is only x 4 routing. I moved it to 1 (x 8) slot. Now, I get full 20 GIG.

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  Hello

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  Hello

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  Those who appear to be 3rd party and are not optical Intel.  Even Cisco SR optics do not work with this card.

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  Me to consider whether or not it is possible to send/receive to 20 Gbps throughput with Intel 82599 dual port card within a guest VM on ESXi. I use to send and receive traffic PF_RING DNA of ntop. I have configured the dual-port card Direct IO mode to allow the guest VM have a direct access to the card. For the traffic generator, I use a metal machine naked with another dual port ethernet to generate traffic. The generator of nu metal machine and ESXi have their double ethernet port directly connected via SPF + cables.

  In the first experiment, the traffic generator generates 10 Gbps of traffic on port 1. The guest VM is able to capture packets at full speed without any loss of package even for 64 byte packets, which translates into 14mil PPS. I had then invited VM pass to 10 Gbps for the traffic generator, which currently receives. However, guest VM was able to generate about 7 Gbps of traffic regardless of package size. The CPU seems to be fine at around only 20% of load. I do not understand why the VM can receive at full speed but could not pass to the line rate.

  In the second experiment, the traffic generator generates 20 Gbps of traffic on ports 2. The guest VM unfortunately can only capture at the rate of 5 to 6 Gbps per port for a total of 10-12 Gbit / s. I have the receiving process listens on each port on a different processor. Then, I got VM generate 10 Gbit/s on each port. Unfortunately, could not reach 5 to 6 Gbps per port, regardless of package size.

  The naked metal machine is only an AMD 2.2 ghz machine low range to four hearts. It can send full line ate 10 Gbps for gpbs port 1 and 20 for 2 ports. The ESXi server is actually a much beefier machine with the quad core Intel Xeon 3.2 Ghz. There is a lot of memory and CPU on ESXi machine.

  5.5 runs the ESXi server. I have 1 comments running virtual machine running experience.

  I'm quite puzzled why there is no bottleneck even in Direct IO mode. Both CPU memory seem to be good. I wonder if there is any setting that I need to be playing with in ESXi. I appreciate all help. Thanks in advance.

  It turned out that I placed the network card in the pci slot 3 which is only x 4 routing. I moved it to 1 (x 8) slot. Now, I get full 20 GIG.

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  Also, you can check this theme

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