selftests/bpf: Set the default value of consumer_cnt as 0

Considering that only bench_ringbufs.c supports consumer, just set the
default value of consumer_cnt as 0. After that, update the validity
check of consumer_cnt, remove unused consumer_thread code snippets and
set consumer_cnt as 1 in run_bench_ringbufs.sh accordingly.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20230613080921.1623219-5-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

selftest/bpf/benchs: Remove an unused header

The benchs/bench_bpf_hashmap_full_update.c doesn't set a custom argp,
so it shouldn't include the <argp.h> header.

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230213091519.1202813-5-aspsk@isovalent.com

selftest/bpf/benchs: Make a function static in bpf_hashmap_full_update

The hashmap_report_final callback function defined in the
benchs/bench_bpf_hashmap_full_update.c file should be static.

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230213091519.1202813-3-aspsk@isovalent.com

selftest/bpf/benchs: Fix a typo in bpf_hashmap_full_update

To call the bpf_hashmap_full_update benchmark, one should say:

bench bpf-hashmap-ful-update

The patch adds a missing 'l' to the benchmark name.

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230213091519.1202813-2-aspsk@isovalent.com

selftest/bpf/benchs: Add bpf_map benchmark

Add benchmark for hash_map to reproduce the worst case
that non-stop update when map's free is zero.

Just like this:
./run_bench_bpf_hashmap_full_update.sh
Setting up benchmark 'bpf-hashmap-ful-update'...
Benchmark 'bpf-hashmap-ful-update' started.
1:hash_map_full_perf 555830 events per sec
...

Signed-off-by: Feng Zhou <zhoufeng.zf@bytedance.com>
Link: https://lore.kernel.org/r/20220610023308.93798-3-zhoufeng.zf@bytedance.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>