tools/testing/selftests/bpf/bench.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #pragma once
   3 #include <stdlib.h>
   4 #include <stdbool.h>
   5 #include <linux/err.h>
   6 #include <errno.h>
   7 #include <unistd.h>
   8 #include <bpf/bpf.h>
   9 #include <bpf/libbpf.h>
  10 #include <math.h>
  11 #include <time.h>
  12 #include <sys/syscall.h>
  13
  14 struct cpu_set {
  15         bool *cpus;
  16         int cpus_len;
  17         int next_cpu;
  18 };
  19
  20 struct env {
  21         char *bench_name;
  22         int duration_sec;
  23         int warmup_sec;
  24         bool verbose;
  25         bool list;
  26         bool affinity;
  27         int consumer_cnt;
  28         int producer_cnt;
  29         struct cpu_set prod_cpus;
  30         struct cpu_set cons_cpus;
  31 };
  32
  33 struct bench_res {
  34         long hits;
  35         long drops;
  36 };
  37
  38 struct bench {
  39         const char *name;
  40         void (*validate)();
  41         void (*setup)();
  42         void *(*producer_thread)(void *ctx);
  43         void *(*consumer_thread)(void *ctx);
  44         void (*measure)(struct bench_res* res);
  45         void (*report_progress)(int iter, struct bench_res* res, long delta_ns);
  46         void (*report_final)(struct bench_res res[], int res_cnt);
  47 };
  48
  49 struct counter {
  50         long value;
  51 } __attribute__((aligned(128)));
  52
  53 extern struct env env;
  54 extern const struct bench *bench;
  55
  56 void setup_libbpf();
  57 void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns);
  58 void hits_drops_report_final(struct bench_res res[], int res_cnt);
  59
  60 static inline __u64 get_time_ns() {
  61         struct timespec t;
  62
  63         clock_gettime(CLOCK_MONOTONIC, &t);
  64
  65         return (u64)t.tv_sec * 1000000000 + t.tv_nsec;
  66 }
  67
  68 static inline void atomic_inc(long *value)
  69 {
  70         (void)__atomic_add_fetch(value, 1, __ATOMIC_RELAXED);
  71 }
  72
  73 static inline void atomic_add(long *value, long n)
  74 {
  75         (void)__atomic_add_fetch(value, n, __ATOMIC_RELAXED);
  76 }
  77
  78 static inline long atomic_swap(long *value, long n)
  79 {
  80         return __atomic_exchange_n(value, n, __ATOMIC_RELAXED);
  81 }