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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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6df96146b2
Some highly optimised applications use SO_INCOMING_CPU to make them
efficient, but they didn't test if it's working correctly by getsockopt()
to avoid slowing down. As a result, no one noticed it had been broken
for years, so it's a good time to add a test to catch future regression.
The test does
1) Create $(nproc) TCP listeners associated with each CPU.
2) Create 32 child sockets for each listener by calling
sched_setaffinity() for each CPU.
3) Check if accept()ed sockets' sk_incoming_cpu matches
listener's one.
If we see -EAGAIN, SO_INCOMING_CPU is broken. However, we might not see
any error even if broken; the kernel could miraculously distribute all SYN
to correct listeners. Not to let that happen, we must increase the number
of clients and CPUs to some extent, so the test requires $(nproc) >= 2 and
creates 64 sockets at least.
Test:
$ nproc
96
$ ./so_incoming_cpu
Before the previous patch:
# Starting 12 tests from 5 test cases.
# RUN so_incoming_cpu.before_reuseport.test1 ...
# so_incoming_cpu.c:191:test1:Expected cpu (5) == i (0)
# test1: Test terminated by assertion
# FAIL so_incoming_cpu.before_reuseport.test1
not ok 1 so_incoming_cpu.before_reuseport.test1
...
# FAILED: 0 / 12 tests passed.
# Totals: pass:0 fail:12 xfail:0 xpass:0 skip:0 error:0
After:
# Starting 12 tests from 5 test cases.
# RUN so_incoming_cpu.before_reuseport.test1 ...
# so_incoming_cpu.c:199:test1:SO_INCOMING_CPU is very likely to be working correctly with 3072 sockets.
# OK so_incoming_cpu.before_reuseport.test1
ok 1 so_incoming_cpu.before_reuseport.test1
...
# PASSED: 12 / 12 tests passed.
# Totals: pass:12 fail:0 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
86 lines
3.4 KiB
Makefile
86 lines
3.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Makefile for net selftests
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CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
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CFLAGS += -I../../../../usr/include/ $(KHDR_INCLUDES)
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TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh \
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rtnetlink.sh xfrm_policy.sh test_blackhole_dev.sh
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TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh ip_defrag.sh
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TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
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TEST_PROGS += udpgro_bench.sh udpgro.sh test_vxlan_under_vrf.sh reuseport_addr_any.sh
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TEST_PROGS += test_vxlan_fdb_changelink.sh so_txtime.sh ipv6_flowlabel.sh
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TEST_PROGS += tcp_fastopen_backup_key.sh fcnal-test.sh l2tp.sh traceroute.sh
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TEST_PROGS += fin_ack_lat.sh fib_nexthop_multiprefix.sh fib_nexthops.sh fib_nexthop_nongw.sh
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TEST_PROGS += altnames.sh icmp.sh icmp_redirect.sh ip6_gre_headroom.sh
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TEST_PROGS += route_localnet.sh
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TEST_PROGS += reuseaddr_ports_exhausted.sh
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TEST_PROGS += txtimestamp.sh
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TEST_PROGS += vrf-xfrm-tests.sh
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TEST_PROGS += rxtimestamp.sh
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TEST_PROGS += devlink_port_split.py
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TEST_PROGS += drop_monitor_tests.sh
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TEST_PROGS += vrf_route_leaking.sh
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TEST_PROGS += bareudp.sh
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TEST_PROGS += amt.sh
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TEST_PROGS += unicast_extensions.sh
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TEST_PROGS += udpgro_fwd.sh
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TEST_PROGS += udpgro_frglist.sh
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TEST_PROGS += veth.sh
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TEST_PROGS += ioam6.sh
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TEST_PROGS += gro.sh
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TEST_PROGS += gre_gso.sh
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TEST_PROGS += cmsg_so_mark.sh
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TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
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TEST_PROGS += srv6_end_dt46_l3vpn_test.sh
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TEST_PROGS += srv6_end_dt4_l3vpn_test.sh
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TEST_PROGS += srv6_end_dt6_l3vpn_test.sh
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TEST_PROGS += srv6_hencap_red_l3vpn_test.sh
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TEST_PROGS += srv6_hl2encap_red_l2vpn_test.sh
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TEST_PROGS += srv6_end_next_csid_l3vpn_test.sh
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TEST_PROGS += vrf_strict_mode_test.sh
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TEST_PROGS += arp_ndisc_evict_nocarrier.sh
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TEST_PROGS += ndisc_unsolicited_na_test.sh
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TEST_PROGS += arp_ndisc_untracked_subnets.sh
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TEST_PROGS += stress_reuseport_listen.sh
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TEST_PROGS += l2_tos_ttl_inherit.sh
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TEST_PROGS += bind_bhash.sh
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TEST_PROGS_EXTENDED := in_netns.sh setup_loopback.sh setup_veth.sh
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TEST_PROGS_EXTENDED += toeplitz_client.sh toeplitz.sh
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TEST_GEN_FILES = socket nettest
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TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any
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TEST_GEN_FILES += tcp_mmap tcp_inq psock_snd txring_overwrite
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TEST_GEN_FILES += udpgso udpgso_bench_tx udpgso_bench_rx ip_defrag
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TEST_GEN_FILES += so_txtime ipv6_flowlabel ipv6_flowlabel_mgr so_netns_cookie
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TEST_GEN_FILES += tcp_fastopen_backup_key
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TEST_GEN_FILES += fin_ack_lat
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TEST_GEN_FILES += reuseaddr_ports_exhausted
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TEST_GEN_FILES += hwtstamp_config rxtimestamp timestamping txtimestamp
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TEST_GEN_FILES += ipsec
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TEST_GEN_FILES += ioam6_parser
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TEST_GEN_FILES += gro
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TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
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TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls tun tap
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TEST_GEN_FILES += toeplitz
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TEST_GEN_FILES += cmsg_sender
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TEST_GEN_FILES += stress_reuseport_listen
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TEST_PROGS += test_vxlan_vnifiltering.sh
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TEST_GEN_FILES += io_uring_zerocopy_tx
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TEST_PROGS += io_uring_zerocopy_tx.sh
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TEST_GEN_FILES += bind_bhash
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TEST_GEN_PROGS += sk_bind_sendto_listen
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TEST_GEN_PROGS += sk_connect_zero_addr
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TEST_PROGS += test_ingress_egress_chaining.sh
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TEST_GEN_PROGS += so_incoming_cpu
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TEST_FILES := settings
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include ../lib.mk
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include bpf/Makefile
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$(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma
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$(OUTPUT)/tcp_mmap: LDLIBS += -lpthread
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$(OUTPUT)/tcp_inq: LDLIBS += -lpthread
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$(OUTPUT)/bind_bhash: LDLIBS += -lpthread
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