mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 20:06:43 +07:00
26e9093110
performance tests for hash map and per-cpu hash map with and without pre-allocation Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
156 lines
3.2 KiB
C
156 lines
3.2 KiB
C
/* Copyright (c) 2016 Facebook
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*/
|
|
#define _GNU_SOURCE
|
|
#include <sched.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <asm/unistd.h>
|
|
#include <unistd.h>
|
|
#include <assert.h>
|
|
#include <sys/wait.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <linux/bpf.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include "libbpf.h"
|
|
#include "bpf_load.h"
|
|
|
|
#define MAX_CNT 1000000
|
|
|
|
static __u64 time_get_ns(void)
|
|
{
|
|
struct timespec ts;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
return ts.tv_sec * 1000000000ull + ts.tv_nsec;
|
|
}
|
|
|
|
#define HASH_PREALLOC (1 << 0)
|
|
#define PERCPU_HASH_PREALLOC (1 << 1)
|
|
#define HASH_KMALLOC (1 << 2)
|
|
#define PERCPU_HASH_KMALLOC (1 << 3)
|
|
|
|
static int test_flags = ~0;
|
|
|
|
static void test_hash_prealloc(int cpu)
|
|
{
|
|
__u64 start_time;
|
|
int i;
|
|
|
|
start_time = time_get_ns();
|
|
for (i = 0; i < MAX_CNT; i++)
|
|
syscall(__NR_getuid);
|
|
printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
|
|
cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
|
|
}
|
|
|
|
static void test_percpu_hash_prealloc(int cpu)
|
|
{
|
|
__u64 start_time;
|
|
int i;
|
|
|
|
start_time = time_get_ns();
|
|
for (i = 0; i < MAX_CNT; i++)
|
|
syscall(__NR_geteuid);
|
|
printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
|
|
cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
|
|
}
|
|
|
|
static void test_hash_kmalloc(int cpu)
|
|
{
|
|
__u64 start_time;
|
|
int i;
|
|
|
|
start_time = time_get_ns();
|
|
for (i = 0; i < MAX_CNT; i++)
|
|
syscall(__NR_getgid);
|
|
printf("%d:hash_map_perf kmalloc %lld events per sec\n",
|
|
cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
|
|
}
|
|
|
|
static void test_percpu_hash_kmalloc(int cpu)
|
|
{
|
|
__u64 start_time;
|
|
int i;
|
|
|
|
start_time = time_get_ns();
|
|
for (i = 0; i < MAX_CNT; i++)
|
|
syscall(__NR_getegid);
|
|
printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
|
|
cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
|
|
}
|
|
|
|
static void loop(int cpu)
|
|
{
|
|
cpu_set_t cpuset;
|
|
|
|
CPU_ZERO(&cpuset);
|
|
CPU_SET(cpu, &cpuset);
|
|
sched_setaffinity(0, sizeof(cpuset), &cpuset);
|
|
|
|
if (test_flags & HASH_PREALLOC)
|
|
test_hash_prealloc(cpu);
|
|
|
|
if (test_flags & PERCPU_HASH_PREALLOC)
|
|
test_percpu_hash_prealloc(cpu);
|
|
|
|
if (test_flags & HASH_KMALLOC)
|
|
test_hash_kmalloc(cpu);
|
|
|
|
if (test_flags & PERCPU_HASH_KMALLOC)
|
|
test_percpu_hash_kmalloc(cpu);
|
|
}
|
|
|
|
static void run_perf_test(int tasks)
|
|
{
|
|
pid_t pid[tasks];
|
|
int i;
|
|
|
|
for (i = 0; i < tasks; i++) {
|
|
pid[i] = fork();
|
|
if (pid[i] == 0) {
|
|
loop(i);
|
|
exit(0);
|
|
} else if (pid[i] == -1) {
|
|
printf("couldn't spawn #%d process\n", i);
|
|
exit(1);
|
|
}
|
|
}
|
|
for (i = 0; i < tasks; i++) {
|
|
int status;
|
|
|
|
assert(waitpid(pid[i], &status, 0) == pid[i]);
|
|
assert(status == 0);
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
|
char filename[256];
|
|
int num_cpu = 8;
|
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
|
|
setrlimit(RLIMIT_MEMLOCK, &r);
|
|
|
|
if (argc > 1)
|
|
test_flags = atoi(argv[1]) ? : test_flags;
|
|
|
|
if (argc > 2)
|
|
num_cpu = atoi(argv[2]) ? : num_cpu;
|
|
|
|
if (load_bpf_file(filename)) {
|
|
printf("%s", bpf_log_buf);
|
|
return 1;
|
|
}
|
|
|
|
run_perf_test(num_cpu);
|
|
|
|
return 0;
|
|
}
|