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Alexei Starovoitov says: ==================== bpf: program testing framework Development and testing of networking bpf programs is quite cumbersome. Especially tricky are XDP programs that attach to real netdevices and program development feels like working on the car engine while the car is in motion. Another problem is ongoing changes to upstream llvm core that can introduce an optimization that verifier will not recognize. llvm bpf backend tests have no ability to run the programs. To improve this situation introduce BPF_PROG_TEST_RUN command to test and performance benchmark bpf programs. It achieves several goals: - development of xdp and skb based bpf programs can be done in a canned environment with unit tests - program performance optimizations can be benchmarked outside of networking core (without driver and skb costs) - continuous testing of upstream changes is finally practical Patches 4,5,6 add C based test cases of various complexity to cover some sched_cls and xdp features. More tests will be added in the future. The tests were run on centos7 only. For now the framework supports only skb and xdp programs. In the future it can be extended to socket_filter and tracing program types. More details are in individual patches. v1->v2: - rename bpf_program_test_run->bpf_prog_test_run - add missing #include <linux/bpf.h> since libbpf.h shouldn't depend on prior includes - reordered patches 3 and 4 to keep bisect clean ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.