Andrii Nakryiko 4eaf0b5c5e selftest/bpf: Fmod_ret prog and implement test_overhead as part of bench ... Add fmod_ret BPF program to existing test_overhead selftest. Also re-implement user-space benchmarking part into benchmark runner to compare results. Results with ./bench are consistently somewhat lower than test_overhead's, but relative performance of various types of BPF programs stay consisten (e.g., kretprobe is noticeably slower). This slowdown seems to be coming from the fact that test_overhead is single-threaded, while benchmark always spins off at least one thread for producer. This has been confirmed by hacking multi-threaded test_overhead variant and also single-threaded bench variant. Resutls are below. run_bench_rename.sh script from benchs/ subdirectory was used to produce results for ./bench. Single-threaded implementations =============================== /* bench: single-threaded, atomics */ base : 4.622 ± 0.049M/s kprobe : 3.673 ± 0.052M/s kretprobe : 2.625 ± 0.052M/s rawtp : 4.369 ± 0.089M/s fentry : 4.201 ± 0.558M/s fexit : 4.309 ± 0.148M/s fmodret : 4.314 ± 0.203M/s /* selftest: single-threaded, no atomics */ task_rename base 4555K events per sec task_rename kprobe 3643K events per sec task_rename kretprobe 2506K events per sec task_rename raw_tp 4303K events per sec task_rename fentry 4307K events per sec task_rename fexit 4010K events per sec task_rename fmod_ret 3984K events per sec Multi-threaded implementations ============================== /* bench: multi-threaded w/ atomics */ base : 3.910 ± 0.023M/s kprobe : 3.048 ± 0.037M/s kretprobe : 2.300 ± 0.015M/s rawtp : 3.687 ± 0.034M/s fentry : 3.740 ± 0.087M/s fexit : 3.510 ± 0.009M/s fmodret : 3.485 ± 0.050M/s /* selftest: multi-threaded w/ atomics */ task_rename base 3872K events per sec task_rename kprobe 3068K events per sec task_rename kretprobe 2350K events per sec task_rename raw_tp 3731K events per sec task_rename fentry 3639K events per sec task_rename fexit 3558K events per sec task_rename fmod_ret 3511K events per sec /* selftest: multi-threaded, no atomics */ task_rename base 3945K events per sec task_rename kprobe 3298K events per sec task_rename kretprobe 2451K events per sec task_rename raw_tp 3718K events per sec task_rename fentry 3782K events per sec task_rename fexit 3543K events per sec task_rename fmod_ret 3526K events per sec Note that the fact that ./bench benchmark always uses atomic increments for counting, while test_overhead doesn't, doesn't influence test results all that much. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200512192445.2351848-4-andriin@fb.com		2020-05-13 12:19:38 -07:00
..
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
attach_probe.c
bpf_iter.c	tools/bpf: selftests: Add bpf_iter selftests	2020-05-09 17:05:27 -07:00
bpf_obj_id.c	selftests/bpf: Test bpf_link's get_next_id, get_fd_by_id, and get_obj_info	2020-04-28 17:27:08 -07:00
bpf_tcp_ca.c	bpf: Add tests for bpf_sk_storage to bpf_tcp_ca	2020-03-23 20:51:55 +01:00
bpf_verif_scale.c
btf_dump.c	selftests/bpf: Fix mix of tabs and spaces	2020-03-20 21:46:12 +01:00
btf_map_in_map.c	libbpf: Add BTF-defined map-in-map support	2020-04-28 17:35:03 -07:00
cgroup_attach_autodetach.c	selftests/bpf: Declare bpf_log_buf variables as static	2020-03-02 17:00:41 -08:00
cgroup_attach_multi.c	selftests/bpf: Declare bpf_log_buf variables as static	2020-03-02 17:00:41 -08:00
cgroup_attach_override.c	selftests/bpf: Declare bpf_log_buf variables as static	2020-03-02 17:00:41 -08:00
cgroup_link.c	selftests/bpf: Test FD-based cgroup attachment	2020-03-30 17:36:41 -07:00
cls_redirect.c	selftests/bpf: Add cls_redirect classifier	2020-04-26 10:00:36 -07:00
connect_force_port.c	bpf: Allow any port in bpf_bind helper	2020-05-09 00:48:20 +02:00
core_extern.c
core_reloc.c	selftests/bpf: Fix invalid memory reads in core_relo selftest	2020-04-28 19:48:05 -07:00
cpu_mask.c	selftests: Use consistent include paths for libbpf	2020-01-20 16:37:45 -08:00
enable_stats.c	bpf: Add selftest for BPF_ENABLE_STATS	2020-05-01 10:36:32 -07:00
fentry_fexit.c	bpf: Add test ops for BPF_PROG_TYPE_TRACING	2020-03-04 13:41:06 -08:00
fentry_test.c	bpf: Add test ops for BPF_PROG_TYPE_TRACING	2020-03-04 13:41:06 -08:00
fexit_bpf2bpf.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
fexit_stress.c
fexit_test.c	bpf: Add test ops for BPF_PROG_TYPE_TRACING	2020-03-04 13:41:06 -08:00
flow_dissector_load_bytes.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
flow_dissector_reattach.c
flow_dissector.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
get_stack_raw_tp.c	bpf: Test_progs, add test to catch retval refine error handling	2020-03-30 15:00:30 -07:00
global_data_init.c	selftests: Add test for overriding global data value before load	2020-03-30 01:17:35 +02:00
global_data.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
hashmap.c	selftests/bpf: Convert test_hashmap into test_progs test	2020-04-28 19:48:05 -07:00
kfree_skb.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
l4lb_all.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
link_pinning.c	selftests/bpf: Add link pinning selftests	2020-03-02 22:06:27 -08:00
map_lock.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
mmap.c	selftests/bpf: Validate frozen map contents stays frozen	2020-04-14 21:28:57 +02:00
modify_return.c	bpf: Add selftests for BPF_MODIFY_RETURN	2020-03-04 13:41:06 -08:00
ns_current_pid_tgid.c	selftests/bpf: Fix bpf_link leak in ns_current_pid_tgid selftest	2020-04-28 19:48:05 -07:00
obj_name.c
perf_branches.c	selftests/bpf: Add bpf_read_branch_records() selftest	2020-02-19 15:01:07 -08:00
perf_buffer.c	selftests/bpf: Disable ASAN instrumentation for mmap()'ed memory read	2020-04-28 19:48:05 -07:00
pinning.c
pkt_access.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
pkt_md_access.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
probe_user.c
prog_run_xattr.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
queue_stack_map.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
raw_tp_writable_reject_nbd_invalid.c
raw_tp_writable_test_run.c
rdonly_maps.c
reference_tracking.c
section_names.c	libbpf: Always specify expected_attach_type on program load if supported	2020-04-15 13:22:43 +02:00
select_reuseport.c	selftests: bpf: Enable UDP sockmap reuseport tests	2020-03-09 22:34:59 +01:00
send_signal_sched_switch.c	selftests/bpf: Add send_signal_sched_switch test	2020-03-05 14:02:41 -08:00
send_signal.c	selftests/bpf: Fix test_progs send_signal flakiness with nmi mode	2020-01-16 13:28:57 -08:00
signal_pending.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
sk_assign.c	selftests/bpf: Use SOCKMAP for server sockets in bpf_sk_assign test	2020-04-29 23:31:00 +02:00
skb_ctx.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
skeleton.c
sockmap_basic.c	bpf: Selftests build error in sockmap_basic.c	2020-02-10 14:31:34 -08:00
sockmap_ktls.c	selftests/bpf: Fix build of sockmap_ktls.c	2020-02-20 01:17:24 +01:00
sockmap_listen.c	selftests/bpf: Fix spurious failures in accept due to EAGAIN	2020-03-13 21:37:06 +01:00
sockopt_inherit.c
sockopt_multi.c
sockopt_sk.c
sockopt.c
spinlock.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
stacktrace_build_id_nmi.c	selftests/bpf: Skip perf hw events test if the setup disabled it	2020-01-20 23:26:58 +01:00
stacktrace_build_id.c
stacktrace_map_raw_tp.c
stacktrace_map.c
tailcalls.c
task_fd_query_rawtp.c
task_fd_query_tp.c
tcp_estats.c
tcp_rtt.c	selftests/bpf: Generalize helpers to control background listener	2020-05-09 00:48:20 +02:00
test_global_funcs.c
test_lsm.c	bpf, lsm: Fix the file_mprotect LSM test.	2020-04-02 19:42:52 -07:00
test_overhead.c	selftest/bpf: Fmod_ret prog and implement test_overhead as part of bench	2020-05-13 12:19:38 -07:00
tp_attach_query.c
trampoline_count.c	selftests/bpf: Fix trampoline_count clean up logic	2020-02-20 18:03:10 -08:00
vmlinux.c	selftests/bpf: Fix nanosleep for real this time	2020-03-17 19:29:12 +01:00
xdp_adjust_tail.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
xdp_attach.c	selftests/bpf: Check for correct program attach/detach in xdp_attach test	2020-04-15 13:26:08 +02:00
xdp_bpf2bpf.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
xdp_info.c	selftests/bpf: Add test for bpf_get_link_xdp_id	2020-04-08 01:35:24 +02:00
xdp_noinline.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00
xdp_perf.c
xdp.c	selftests/bpf: Move existing common networking parts into network_helpers	2020-05-09 00:48:20 +02:00