Trex Stuck in 370 Mbps in ESX

[vahid.t...@gmail.com]

Hi
i installed trex on esx, interfaces are VMXNET3 , 32core vCPU
but maximum bandwidth i get is 370Mbps , and 99% CPU load.
please advise me about this

Regards

[Yaroslav Brustinov]

Hi,

Is it with small packet size?

Thanks,

Yaroslav.

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[vahid.t...@gmail.com]

On Sunday, May 13, 2018 at 8:52:25 PM UTC+4:30, y.brustinov wrote:
> Hi,
>
>
> Is it with small packet size?
>
>
> Thanks,
> Yaroslav.
>
>
> On Sun, May 13, 2018 at 7:10 PM, <vahid.t...@gmail.com> wrote:
> Hi
>
> i installed trex on esx, interfaces are VMXNET3 , 32core vCPU
>
> but maximum bandwidth i get is 370Mbps , and 99% CPU load.
>
> please advise me about this
>
>
>
> Regards
>
>
>
> --
>
> You received this message because you are subscribed to the Google Groups "TRex Traffic Generator" group.
>

> To unsubscribe from this group and stop receiving emails from it, send an email to trex-tgn+u...@googlegroups.com.

>
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>
> For more options, visit https://groups.google.com/d/optout.

Hi yaroslav

thanks for your reply
i set L4 and Payload to none and size of packet is 64, if i got your question right.

[vahid.t...@gmail.com]

On Sunday, May 13, 2018 at 8:52:25 PM UTC+4:30, y.brustinov wrote:

> Hi,
>
>
> Is it with small packet size?
>
>
> Thanks,
> Yaroslav.
>
>
> On Sun, May 13, 2018 at 7:10 PM, <vahid.t...@gmail.com> wrote:
> Hi
>
> i installed trex on esx, interfaces are VMXNET3 , 32core vCPU
>
> but maximum bandwidth i get is 370Mbps , and 99% CPU load.
>
> please advise me about this
>
>
>
> Regards
>
>
>
> --
>
> You received this message because you are subscribed to the Google Groups "TRex Traffic Generator" group.
>

> To unsubscribe from this group and stop receiving emails from it, send an email to trex-tgn+u...@googlegroups.com.

>
> To post to this group, send email to trex...@googlegroups.com.
>
> To view this discussion on the web visit https://groups.google.com/d/msgid/trex-tgn/d257485d-7b32-4295-a10e-298ff2e6264f%40googlegroups.com.
>
> For more options, visit https://groups.google.com/d/optout.

Thank you Yaroslav

after i change the packet size to 1000, my problem resolved

regards

[Yaroslav Brustinov]

Hi,

For bidirectional traffic it's expected. For unidirectional, you should get ~twice more.

Still, vmxnet3 is not best performance-wise.

Consider using passthrough NICs:

https://trex-tgn.cisco.com/trex/doc/trex_manual.html#_configuring_pass_through

...or SR-IOV:

https://trex-tgn.cisco.com/trex/doc/trex_appendix_linux_vf_config.html

Thanks,

Yaroslav.

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