Wireblast a 100 Gbps packet generator in Go using AF_XDP
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Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#2Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#3That’s very interesting, thank you for sharing. Looks like it could be a very useful tool for testing high performance networking.
I wonder if something similar could be done using TC BPF instead of AF_XDP? My only reservation about AF XDP is that it requires a special NIC to support it, so it may not be useful for a “regular Joe” user. I wonder if TC BPF would also work since it similarly bypasses the Kernel networking stack, I believe you can put packets directly into the NIC TX queue for transmission
Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#4https://toonk.io/wireblast-building-a-line-rate-packet-gener...
Ah thanks!!
Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#5That’s very interesting, thank you for sharing. Looks like it could be a very useful tool for testing high performance networking. I wonder if something similar could be done using TC BPF instead of AF_XDP? My only reservation about AF XDP is that it requires a special NIC to support it, so it may not be useful for a “regular Joe” user. I wonder if TC BPF would also work since it similarly bypasses the Kernel network…
you can use generic af_xdp which sits at the TC layer. Just get a bit less performance.
Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#6That’s very interesting, thank you for sharing. Looks like it could be a very useful tool for testing high performance networking. I wonder if something similar could be done using TC BPF instead of AF_XDP? My only reservation about AF XDP is that it requires a special NIC to support it, so it may not be useful for a “regular Joe” user. I wonder if TC BPF would also work since it similarly bypasses the Kernel network…
you can use generic af_xdp which sits at the TC layer. Just get a bit less performance.
That's what the veth examples are using
Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#7That’s very interesting, thank you for sharing. Looks like it could be a very useful tool for testing high performance networking. I wonder if something similar could be done using TC BPF instead of AF_XDP? My only reservation about AF XDP is that it requires a special NIC to support it, so it may not be useful for a “regular Joe” user. I wonder if TC BPF would also work since it similarly bypasses the Kernel network…
You can, but the interesting thing about AF_XDP is that you've got a userland path to writing directly to the card's DMA buffers; TC BPF still allocates an skbuff for every packet you send.
Re: Wireblast a 100 Gbps packet generator in Go using AF_XDP
#8That’s very interesting, thank you for sharing. Looks like it could be a very useful tool for testing high performance networking. I wonder if something similar could be done using TC BPF instead of AF_XDP? My only reservation about AF XDP is that it requires a special NIC to support it, so it may not be useful for a “regular Joe” user. I wonder if TC BPF would also work since it similarly bypasses the Kernel network…
it seems like every NIC on the market that can do 100Gb has support in its linux kernel driver, so probably not a big deal in practice