Quelle  bench_count.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include "bench.h"

/* COUNT-GLOBAL benchmark */

static struct count_global_ctx {
 struct counter hits;
} count_global_ctx;

static void *count_global_producer(void *input)
{
 struct count_global_ctx *ctx = &count_global_ctx;

 while (true) {
  atomic_inc(&ctx->hits.value);
 }
 return NULL;
}

static void count_global_measure(struct bench_res *res)
{
 struct count_global_ctx *ctx = &count_global_ctx;

 res->hits = atomic_swap(&ctx->hits.value, 0);
}

/* COUNT-local benchmark */

static struct count_local_ctx {
 struct counter *hits;
} count_local_ctx;

static void count_local_setup(void)
{
 struct count_local_ctx *ctx = &count_local_ctx;

 ctx->hits = calloc(env.producer_cnt, sizeof(*ctx->hits));
 if (!ctx->hits)
  exit(1);
}

static void *count_local_producer(void *input)
{
 struct count_local_ctx *ctx = &count_local_ctx;
 int idx = (long)input;

 while (true) {
  atomic_inc(&ctx->hits[idx].value);
 }
 return NULL;
}

static void count_local_measure(struct bench_res *res)
{
 struct count_local_ctx *ctx = &count_local_ctx;
 int i;

 for (i = 0; i < env.producer_cnt; i++) {
  res->hits += atomic_swap(&ctx->hits[i].value, 0);
 }
}

const struct bench bench_count_global = {
 .name = "count-global",
 .producer_thread = count_global_producer,
 .measure = count_global_measure,
 .report_progress = hits_drops_report_progress,
 .report_final = hits_drops_report_final,
};

const struct bench bench_count_local = {
 .name = "count-local",
 .setup = count_local_setup,
 .producer_thread = count_local_producer,
 .measure = count_local_measure,
 .report_progress = hits_drops_report_progress,
 .report_final = hits_drops_report_final,
};