tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
14struct cpu_set {
15 bool *cpus;
16 int cpus_len;
17 int next_cpu;
18};
19
20struct 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
33struct basic_stats {
34 double mean;
35 double stddev;
36};
37
38struct bench_res {
39 long hits;
40 long drops;
41 long false_hits;
42 long important_hits;
43 unsigned long gp_ns;
44 unsigned long gp_ct;
45 unsigned int stime;
46};
47
48struct bench {
49 const char *name;
50 void (*validate)(void);
51 void (*setup)(void);
52 void *(*producer_thread)(void *ctx);
53 void *(*consumer_thread)(void *ctx);
54 void (*measure)(struct bench_res* res);
55 void (*report_progress)(int iter, struct bench_res* res, long delta_ns);
56 void (*report_final)(struct bench_res res[], int res_cnt);
57};
58
59struct counter {
60 long value;
61} __attribute__((aligned(128)));
62
63extern struct env env;
64extern const struct bench *bench;
65
66void setup_libbpf(void);
67void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns);
68void hits_drops_report_final(struct bench_res res[], int res_cnt);
69void false_hits_report_progress(int iter, struct bench_res *res, long delta_ns);
70void false_hits_report_final(struct bench_res res[], int res_cnt);
71void ops_report_progress(int iter, struct bench_res *res, long delta_ns);
72void ops_report_final(struct bench_res res[], int res_cnt);
73void local_storage_report_progress(int iter, struct bench_res *res,
74 long delta_ns);
75void local_storage_report_final(struct bench_res res[], int res_cnt);
76void grace_period_latency_basic_stats(struct bench_res res[], int res_cnt,
77 struct basic_stats *gp_stat);
78void grace_period_ticks_basic_stats(struct bench_res res[], int res_cnt,
79 struct basic_stats *gp_stat);
80
81static inline __u64 get_time_ns(void)
82{
83 struct timespec t;
84
85 clock_gettime(CLOCK_MONOTONIC, &t);
86
87 return (u64)t.tv_sec * 1000000000 + t.tv_nsec;
88}
89
90static inline void atomic_inc(long *value)
91{
92 (void)__atomic_add_fetch(value, 1, __ATOMIC_RELAXED);
93}
94
95static inline void atomic_add(long *value, long n)
96{
97 (void)__atomic_add_fetch(value, n, __ATOMIC_RELAXED);
98}
99
100static inline long atomic_swap(long *value, long n)
101{
102 return __atomic_exchange_n(value, n, __ATOMIC_RELAXED);
103}