1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2022 Bytedance */
3
4 #include <argp.h>
5 #include "bench.h"
6 #include "bpf_hashmap_full_update_bench.skel.h"
7 #include "bpf_util.h"
8
9 /* BPF triggering benchmarks */
10 static struct ctx {
11 struct bpf_hashmap_full_update_bench *skel;
12 } ctx;
13
14 #define MAX_LOOP_NUM 10000
15
validate(void)16 static void validate(void)
17 {
18 if (env.consumer_cnt != 1) {
19 fprintf(stderr, "benchmark doesn't support multi-consumer!\n");
20 exit(1);
21 }
22 }
23
producer(void * input)24 static void *producer(void *input)
25 {
26 while (true) {
27 /* trigger the bpf program */
28 syscall(__NR_getpgid);
29 }
30
31 return NULL;
32 }
33
consumer(void * input)34 static void *consumer(void *input)
35 {
36 return NULL;
37 }
38
measure(struct bench_res * res)39 static void measure(struct bench_res *res)
40 {
41 }
42
setup(void)43 static void setup(void)
44 {
45 struct bpf_link *link;
46 int map_fd, i, max_entries;
47
48 setup_libbpf();
49
50 ctx.skel = bpf_hashmap_full_update_bench__open_and_load();
51 if (!ctx.skel) {
52 fprintf(stderr, "failed to open skeleton\n");
53 exit(1);
54 }
55
56 ctx.skel->bss->nr_loops = MAX_LOOP_NUM;
57
58 link = bpf_program__attach(ctx.skel->progs.benchmark);
59 if (!link) {
60 fprintf(stderr, "failed to attach program!\n");
61 exit(1);
62 }
63
64 /* fill hash_map */
65 map_fd = bpf_map__fd(ctx.skel->maps.hash_map_bench);
66 max_entries = bpf_map__max_entries(ctx.skel->maps.hash_map_bench);
67 for (i = 0; i < max_entries; i++)
68 bpf_map_update_elem(map_fd, &i, &i, BPF_ANY);
69 }
70
hashmap_report_final(struct bench_res res[],int res_cnt)71 void hashmap_report_final(struct bench_res res[], int res_cnt)
72 {
73 unsigned int nr_cpus = bpf_num_possible_cpus();
74 int i;
75
76 for (i = 0; i < nr_cpus; i++) {
77 u64 time = ctx.skel->bss->percpu_time[i];
78
79 if (!time)
80 continue;
81
82 printf("%d:hash_map_full_perf %lld events per sec\n",
83 i, ctx.skel->bss->nr_loops * 1000000000ll / time);
84 }
85 }
86
87 const struct bench bench_bpf_hashmap_full_update = {
88 .name = "bpf-hashmap-ful-update",
89 .validate = validate,
90 .setup = setup,
91 .producer_thread = producer,
92 .consumer_thread = consumer,
93 .measure = measure,
94 .report_progress = NULL,
95 .report_final = hashmap_report_final,
96 };
97