selftests: bpf: Add xdp_perf test (e754f5a6) · Commits · 戴 / test

The xdp_perf is a dummy XDP test, only used to measure the the cost of jumping into a naive XDP program one million times. To build and run the program: $ cd tools/testing/selftests/bpf $ make $ ./test_progs -v -t xdp_perf Signed-off-by:

Björn Töpel <bjorn.topel@intel.com> Signed-off-by:

Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191213175112.30208-6-bjorn.topel@gmail.com

tools/testing/selftests/bpf/prog_tests/xdp_perf.c

0 → 100644

+25 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		#include <test_progs.h>

		void test_xdp_perf(void)
		{
		const char *file = "./xdp_dummy.o";
		__u32 duration, retval, size;
		struct bpf_object *obj;
		char in[128], out[128];
		int err, prog_fd;

		err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
		if (CHECK_FAIL(err))
		return;

		err = bpf_prog_test_run(prog_fd, 1000000, &in[0], 128,
		out, &size, &retval, &duration);

		CHECK(err \|\| retval != XDP_PASS \|\| size != 128,
		"xdp-perf",
		"err %d errno %d retval %d size %d\n",
		err, errno, retval, size);

		bpf_object__close(obj);
		}

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