Re: IOVisor help
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Brenden Blanco <bblanco@...>
Hello Ashhad, It would be good to know what type of use case you have in mind for transferring data between user and kernel space, then perhaps I can answer more accurately. For instance, if using the KPROBE program type, it is possible to use a BPF program as a filter of events that are later accessible through mmap, see "MMAP layout" in http://man7.org/linux/man-pages/man2/perf_event_open.2.html. Or, if using a SOCKET type, the BPF program works as it does traditionally with tcpdump, to filter packets into a socket. A userspace program can listen on said socket. For the SCHED_ACT and SCHED_CLS types, the BPF program can use a helper function to clone or redirect a packet to an ifindex of its choosing. Please let me know which of these categories you are interested in. Thanks, Brenden Blanco On Tue, Sep 22, 2015 at 4:57 AM, Ashhad Sheikh via iovisor-dev <iovisor-dev@...> wrote: Hello, I am Ashhad. A CS major undergraduate student. I am researching on iOVISOR, specifically on it's real life performance. |
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