Joanne Koong f6e659b7f9 selftests/bpf: Measure bpf_loop verifier performance ... This patch tests bpf_loop in pyperf and strobemeta, and measures the verifier performance of replacing the traditional for loop with bpf_loop. The results are as follows: ~strobemeta~ Baseline verification time 6808200 usec stack depth 496 processed 554252 insns (limit 1000000) max_states_per_insn 16 total_states 15878 peak_states 13489 mark_read 3110 #192 verif_scale_strobemeta:OK (unrolled loop) Using bpf_loop verification time 31589 usec stack depth 96+400 processed 1513 insns (limit 1000000) max_states_per_insn 2 total_states 106 peak_states 106 mark_read 60 #193 verif_scale_strobemeta_bpf_loop:OK ~pyperf600~ Baseline verification time 29702486 usec stack depth 368 processed 626838 insns (limit 1000000) max_states_per_insn 7 total_states 30368 peak_states 30279 mark_read 748 #182 verif_scale_pyperf600:OK (unrolled loop) Using bpf_loop verification time 148488 usec stack depth 320+40 processed 10518 insns (limit 1000000) max_states_per_insn 10 total_states 705 peak_states 517 mark_read 38 #183 verif_scale_pyperf600_bpf_loop:OK Using the bpf_loop helper led to approximately a 99% decrease in the verification time and in the number of instructions. Signed-off-by: Joanne Koong <joannekoong@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211130030622.4131246-4-joannekoong@fb.com		2021-11-30 10:56:28 -08:00
..
.gitignore
align.c	selftests/bpf: Convert legacy prog load APIs to bpf_prog_load()	2021-11-07 08:34:23 -08:00
atomic_bounds.c
atomics.c
attach_probe.c
autoload.c
bind_perm.c
bloom_filter_map.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
bpf_cookie.c
bpf_iter.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
bpf_iter_setsockopt.c
bpf_loop.c	selftests/bpf: Add bpf_loop test	2021-11-30 10:56:28 -08:00
bpf_obj_id.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
bpf_tcp_ca.c
bpf_verif_scale.c	selftests/bpf: Measure bpf_loop verifier performance	2021-11-30 10:56:28 -08:00
btf.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
btf_dedup_split.c	selftests/bpf: Add btf_dedup case with duplicated structs within CU	2021-11-19 16:59:17 +01:00
btf_dump.c	selftests/bpf: Fix UBSan complaint about signed __int128 overflow	2021-11-26 00:15:03 +01:00
btf_endian.c
btf_map_in_map.c
btf_module.c
btf_skc_cls_ingress.c
btf_split.c	selftests/bpf: Update btf_dump__new() uses to v1.0+ variant	2021-11-11 16:54:06 -08:00
btf_tag.c	selftests/bpf: Add a C test for btf_type_tag	2021-11-11 17:41:11 -08:00
btf_write.c	selftests/bpf: Test libbpf API function btf__add_type_tag()	2021-11-11 17:41:11 -08:00
cg_storage_multi.c
cgroup_attach_autodetach.c	selftests/bpf: Use explicit bpf_test_load_program() helper calls	2021-11-07 08:34:24 -08:00
cgroup_attach_multi.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
cgroup_attach_override.c	selftests/bpf: Use explicit bpf_test_load_program() helper calls	2021-11-07 08:34:24 -08:00
cgroup_link.c
cgroup_skb_sk_lookup.c
cgroup_v1v2.c
check_mtu.c
cls_redirect.c
connect_force_port.c
core_autosize.c
core_extern.c
core_read_macros.c
core_reloc.c	selftests/bpf: Fix possible NULL passed to memcpy() with zero size	2021-11-26 00:15:03 +01:00
core_retro.c
cpu_mask.c
d_path.c
dummy_st_ops.c
enable_stats.c
endian.c
exhandler.c	selftests/bpf: Add exception handling selftests for tp_bpf program	2021-11-08 22:17:55 +01:00
fentry_fexit.c
fentry_test.c
fexit_bpf2bpf.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
fexit_sleep.c
fexit_stress.c	selftests/bpf: Convert legacy prog load APIs to bpf_prog_load()	2021-11-07 08:34:23 -08:00
fexit_test.c
find_vma.c	selftests/bpf: Add tests for bpf_find_vma	2021-11-07 11:54:51 -08:00
flow_dissector.c
flow_dissector_load_bytes.c	selftests/bpf: Use explicit bpf_test_load_program() helper calls	2021-11-07 08:34:24 -08:00
flow_dissector_reattach.c	selftests/bpf: Use explicit bpf_test_load_program() helper calls	2021-11-07 08:34:24 -08:00
for_each.c
get_branch_snapshot.c
get_func_ip_test.c
get_stack_raw_tp.c	selftests/bpf: Prevent misaligned memory access in get_stack_raw_tp test	2021-11-26 00:15:03 +01:00
get_stackid_cannot_attach.c
global_data.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
global_data_init.c
global_func_args.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
hash_large_key.c
hashmap.c
kfree_skb.c	selftests/bpf: Migrate all deprecated perf_buffer uses	2021-11-11 16:54:05 -08:00
kfunc_call.c
ksyms.c
ksyms_btf.c
ksyms_module.c
l4lb_all.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
legacy_printk.c	selftests/bpf: Mix legacy (maps) and modern (vars) BPF in one test	2021-11-25 23:05:23 +01:00
link_pinning.c
linked_funcs.c
linked_maps.c
linked_vars.c
load_bytes_relative.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
lookup_and_delete.c
map_init.c
map_lock.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
map_ptr.c
metadata.c
migrate_reuseport.c	selftests/bpf: Destroy XDP link correctly	2021-11-07 09:14:15 -08:00
mmap.c
modify_return.c
module_attach.c
netcnt.c	selftests/bpf: Make netcnt selftests serial to avoid spurious failures	2021-11-03 15:43:09 +01:00
netns_cookie.c
ns_current_pid_tgid.c
obj_name.c
pe_preserve_elems.c
perf_branches.c
perf_buffer.c	selftests/bpf: Migrate all deprecated perf_buffer uses	2021-11-11 16:54:05 -08:00
perf_event_stackmap.c
perf_link.c
pinning.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
pkt_access.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
pkt_md_access.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
probe_read_user_str.c
probe_user.c
prog_array_init.c	selftests/bpf: Test BPF_MAP_TYPE_PROG_ARRAY static initialization	2021-11-28 22:24:57 -08:00
prog_run_xattr.c
queue_stack_map.c	selftests/bpf: Fix misaligned memory access in queue_stack_map test	2021-11-26 00:15:03 +01:00
raw_tp_test_run.c
raw_tp_writable_reject_nbd_invalid.c	selftests/bpf: Convert legacy prog load APIs to bpf_prog_load()	2021-11-07 08:34:23 -08:00
raw_tp_writable_test_run.c	selftests/bpf: Convert legacy prog load APIs to bpf_prog_load()	2021-11-07 08:34:23 -08:00
rdonly_maps.c
recursion.c
reference_tracking.c
resolve_btfids.c
ringbuf.c
ringbuf_multi.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
section_names.c
select_reuseport.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
send_signal.c
send_signal_sched_switch.c
signal_pending.c	selftests/bpf: Use explicit bpf_test_load_program() helper calls	2021-11-07 08:34:24 -08:00
sk_assign.c
sk_lookup.c	selftests/bpf: Add tests for accessing ingress_ifindex in bpf_sk_lookup	2021-11-10 16:29:59 -08:00
sk_storage_tracing.c
skb_ctx.c	selftests/bpf: Fix bpf_object leak in skb_ctx selftest	2021-11-07 09:14:15 -08:00
skb_helpers.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
skc_to_unix_sock.c
skeleton.c
snprintf.c
snprintf_btf.c
sock_fields.c
socket_cookie.c
sockmap_basic.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
sockmap_ktls.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
sockmap_listen.c	selftests/bpf: Migrate selftests to bpf_map_create()	2021-11-25 23:37:38 +01:00
sockopt.c	selftests/bpf: Convert legacy prog load APIs to bpf_prog_load()	2021-11-07 08:34:23 -08:00
sockopt_inherit.c
sockopt_multi.c
sockopt_qos_to_cc.c
sockopt_sk.c
spinlock.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
stack_var_off.c
stacktrace_build_id.c
stacktrace_build_id_nmi.c
stacktrace_map.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
stacktrace_map_raw_tp.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
static_linked.c
subprogs.c
syscall.c
tailcalls.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
task_fd_query_rawtp.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
task_fd_query_tp.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
task_local_storage.c
task_pt_regs.c
tc_bpf.c
tc_redirect.c
tcp_estats.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
tcp_hdr_options.c
tcp_rtt.c
tcpbpf_user.c
test_bpffs.c	selftests/bpf: Prevent out-of-bounds stack access in test_bpffs	2021-11-26 00:15:03 +01:00
test_bprm_opts.c
test_global_funcs.c
test_ima.c
test_local_storage.c
test_lsm.c
test_overhead.c
test_profiler.c
test_skb_pkt_end.c
timer.c
timer_mim.c
tp_attach_query.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
trace_ext.c
trace_printk.c
trace_vprintk.c
trampoline_count.c
udp_limit.c
varlen.c
verif_stats.c
vmlinux.c
xdp.c	selftests/bpf: Fix misaligned accesses in xdp and xdp_bpf2bpf tests	2021-11-26 00:15:03 +01:00
xdp_adjust_tail.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
xdp_attach.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
xdp_bonding.c	selftests/bpf: Fix misaligned memory accesses in xdp_bonding test	2021-11-26 00:15:03 +01:00
xdp_bpf2bpf.c	selftests/bpf: Fix misaligned accesses in xdp and xdp_bpf2bpf tests	2021-11-26 00:15:03 +01:00
xdp_context_test_run.c
xdp_cpumap_attach.c
xdp_devmap_attach.c
xdp_info.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
xdp_link.c
xdp_noinline.c
xdp_perf.c	selftests/bpf: Use explicit bpf_prog_test_load() calls everywhere	2021-11-07 08:34:23 -08:00
xdpwall.c