From 6de4a9c430b57c6ebbccd2a1725f42e9be75f592 Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Wed, 22 Jan 2020 15:36:58 -0800 Subject: bpf: tcp: Add bpf_cubic example This patch adds a bpf_cubic example. Some highlights: 1. CONFIG_HZ .kconfig map is used. 2. In bictcp_update(), calculation is changed to use usec resolution (i.e. USEC_PER_JIFFY) instead of using jiffies. Thus, usecs_to_jiffies() is not used in the bpf_cubic.c. 3. In bitctcp_update() [under tcp_friendliness], the original "while (ca->ack_cnt > delta)" loop is changed to the equivalent "ca->ack_cnt / delta" operation. Signed-off-by: Martin KaFai Lau Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200122233658.903774-1-kafai@fb.com --- .../testing/selftests/bpf/prog_tests/bpf_tcp_ca.c | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c') diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c index 517318f05b1d..8482bbc67eec 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c @@ -4,6 +4,7 @@ #include #include #include "bpf_dctcp.skel.h" +#include "bpf_cubic.skel.h" #define min(a, b) ((a) < (b) ? (a) : (b)) @@ -158,6 +159,28 @@ done: close(fd); } +static void test_cubic(void) +{ + struct bpf_cubic *cubic_skel; + struct bpf_link *link; + + cubic_skel = bpf_cubic__open_and_load(); + if (CHECK(!cubic_skel, "bpf_cubic__open_and_load", "failed\n")) + return; + + link = bpf_map__attach_struct_ops(cubic_skel->maps.cubic); + if (CHECK(IS_ERR(link), "bpf_map__attach_struct_ops", "err:%ld\n", + PTR_ERR(link))) { + bpf_cubic__destroy(cubic_skel); + return; + } + + do_test("bpf_cubic"); + + bpf_link__destroy(link); + bpf_cubic__destroy(cubic_skel); +} + static void test_dctcp(void) { struct bpf_dctcp *dctcp_skel; @@ -184,4 +207,6 @@ void test_bpf_tcp_ca(void) { if (test__start_subtest("dctcp")) test_dctcp(); + if (test__start_subtest("cubic")) + test_cubic(); } -- cgit v1.2.3