Re: [iovisor-dev] how to run bcc xdp_redirect_cpu.py example
On Wed, 22 May 2019 12:28:46 +0800 "Gary Lin" wrote: > On Tue, May 21, 2019 at 08:17:16PM -0700, forrest0...@gmail.com wrote: > > Hi, > > I’m new to bpf and when run `iovisor/bcc` examples with > > `xdp_redirect_cpu.py` in my vm, the connection will lost and I have > > to restart my vm. In my understanding this example just foword the > > package from one cpu to another and the package should not lost. Am > > I missing something? Anyone can help me? Thank you > > > > PS: xdp is loaded in xdpgeneric mode > > > > CPUMAP is not supported by generic XDP(*). Besides, it provides very little > benefit since the packet is already packaged into a skb and there is no need > to package it again with another CPU. > > (*) https://github.com/torvalds/linux/blob/v5.1/net/core/filter.c#L3560-L3563 Thanks you Gary, for pointing this out. I added the TODO in the code, and it is still on my todo list for CPUMAP here: https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap.org -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#1675): https://lists.iovisor.org/g/iovisor-dev/message/1675 Mute This Topic: https://lists.iovisor.org/mt/31716133/21656 Group Owner: iovisor-dev+ow...@lists.iovisor.org Unsubscribe: https://lists.iovisor.org/g/iovisor-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
Re: [iovisor-dev] how to run bcc xdp_redirect_cpu.py example
On Tue, May 21, 2019 at 08:17:16PM -0700, forrest0...@gmail.com wrote: > Hi, I’m new to bpf and when run `iovisor/bcc` examples with > `xdp_redirect_cpu.py` in my vm, the connection will lost and I have to > restart my vm. In my understanding this example just foword the package from > one cpu to another and the package should not lost. Am I missing something? > Anyone can help me? Thank you > > PS: xdp is loaded in xdpgeneric mode > CPUMAP is not supported by generic XDP(*). Besides, it provides very little benefit since the packet is already packaged into a skb and there is no need to package it again with another CPU. Cheers, Gary Lin (*) https://github.com/torvalds/linux/blob/v5.1/net/core/filter.c#L3560-L3563 -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#1674): https://lists.iovisor.org/g/iovisor-dev/message/1674 Mute This Topic: https://lists.iovisor.org/mt/31716133/21656 Group Owner: iovisor-dev+ow...@lists.iovisor.org Unsubscribe: https://lists.iovisor.org/g/iovisor-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
[iovisor-dev] how to run bcc xdp_redirect_cpu.py example
Hi, I’m new to bpf and when run `iovisor/bcc` examples with `xdp_redirect_cpu.py` in my vm, the connection will lost and I have to restart my vm. In my understanding this example just foword the package from one cpu to another and the package should not lost. Am I missing something? Anyone can help me? Thank you PS: xdp is loaded in xdpgeneric mode -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#1671): https://lists.iovisor.org/g/iovisor-dev/message/1671 Mute This Topic: https://lists.iovisor.org/mt/31716133/21656 Group Owner: iovisor-dev+ow...@lists.iovisor.org Unsubscribe: https://lists.iovisor.org/g/iovisor-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
