1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2020 Facebook */
3#include "bench.h"
4
5/* COUNT-GLOBAL benchmark */
6
7static struct count_global_ctx {
8 struct counter hits;
9} count_global_ctx;
10
11static void *count_global_producer(void *input)
12{
13 struct count_global_ctx *ctx = &count_global_ctx;
14
15 while (true) {
16 atomic_inc(&ctx->hits.value);
17 }
18 return NULL;
19}
20
21static void count_global_measure(struct bench_res *res)
22{
23 struct count_global_ctx *ctx = &count_global_ctx;
24
25 res->hits = atomic_swap(&ctx->hits.value, 0);
26}
27
28/* COUNT-local benchmark */
29
30static struct count_local_ctx {
31 struct counter *hits;
32} count_local_ctx;
33
34static void count_local_setup(void)
35{
36 struct count_local_ctx *ctx = &count_local_ctx;
37
38 ctx->hits = calloc(env.producer_cnt, sizeof(*ctx->hits));
39 if (!ctx->hits)
40 exit(1);
41}
42
43static void *count_local_producer(void *input)
44{
45 struct count_local_ctx *ctx = &count_local_ctx;
46 int idx = (long)input;
47
48 while (true) {
49 atomic_inc(&ctx->hits[idx].value);
50 }
51 return NULL;
52}
53
54static void count_local_measure(struct bench_res *res)
55{
56 struct count_local_ctx *ctx = &count_local_ctx;
57 int i;
58
59 for (i = 0; i < env.producer_cnt; i++) {
60 res->hits += atomic_swap(&ctx->hits[i].value, 0);
61 }
62}
63
64const struct bench bench_count_global = {
65 .name = "count-global",
66 .producer_thread = count_global_producer,
67 .measure = count_global_measure,
68 .report_progress = hits_drops_report_progress,
69 .report_final = hits_drops_report_final,
70};
71
72const struct bench bench_count_local = {
73 .name = "count-local",
74 .setup = count_local_setup,
75 .producer_thread = count_local_producer,
76 .measure = count_local_measure,
77 .report_progress = hits_drops_report_progress,
78 .report_final = hits_drops_report_final,
79};
80

source code of linux/tools/testing/selftests/bpf/benchs/bench_count.c