77e63534d6
Building BPF samples is failing with the below error:
samples/bpf/map_perf_test_user.c: In function ‘main’:
samples/bpf/map_perf_test_user.c:134:9: error: variable ‘r’ has
initializer but incomplete type
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^
samples/bpf/map_perf_test_user.c:134:21: error: ‘RLIM_INFINITY’
undeclared (first use in this function)
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^
samples/bpf/map_perf_test_user.c:134:21: note: each undeclared
identifier is reported only once for each function it appears in
samples/bpf/map_perf_test_user.c:134:9: warning: excess elements in
struct initializer [enabled by default]
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^
samples/bpf/map_perf_test_user.c:134:9: warning: (near initialization
for ‘r’) [enabled by default]
samples/bpf/map_perf_test_user.c:134:9: warning: excess elements in
struct initializer [enabled by default]
samples/bpf/map_perf_test_user.c:134:9: warning: (near initialization
for ‘r’) [enabled by default]
samples/bpf/map_perf_test_user.c:134:16: error: storage size of ‘r’
isn’t known
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^
samples/bpf/map_perf_test_user.c:139:2: warning: implicit declaration of
function ‘setrlimit’ [-Wimplicit-function-declaration]
setrlimit(RLIMIT_MEMLOCK, &r);
^
samples/bpf/map_perf_test_user.c:139:12: error: ‘RLIMIT_MEMLOCK’
undeclared (first use in this function)
setrlimit(RLIMIT_MEMLOCK, &r);
^
samples/bpf/map_perf_test_user.c:134:16: warning: unused variable ‘r’
[-Wunused-variable]
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
^
make[2]: *** [samples/bpf/map_perf_test_user.o] Error 1
Fix this by including the necessary header file.
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
/* Copyright (c) 2016 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#define _GNU_SOURCE
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#include <sched.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <asm/unistd.h>
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#include <unistd.h>
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#include <assert.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <linux/bpf.h>
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#include <string.h>
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#include <time.h>
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#include <sys/resource.h>
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#include "libbpf.h"
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#include "bpf_load.h"
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#define MAX_CNT 1000000
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static __u64 time_get_ns(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000ull + ts.tv_nsec;
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}
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#define HASH_PREALLOC (1 << 0)
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#define PERCPU_HASH_PREALLOC (1 << 1)
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#define HASH_KMALLOC (1 << 2)
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#define PERCPU_HASH_KMALLOC (1 << 3)
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static int test_flags = ~0;
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static void test_hash_prealloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < MAX_CNT; i++)
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syscall(__NR_getuid);
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printf("%d:hash_map_perf pre-alloc %lld events per sec\n",
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cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_percpu_hash_prealloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < MAX_CNT; i++)
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syscall(__NR_geteuid);
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printf("%d:percpu_hash_map_perf pre-alloc %lld events per sec\n",
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cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_hash_kmalloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < MAX_CNT; i++)
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syscall(__NR_getgid);
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printf("%d:hash_map_perf kmalloc %lld events per sec\n",
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cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
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}
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static void test_percpu_hash_kmalloc(int cpu)
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{
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__u64 start_time;
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int i;
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start_time = time_get_ns();
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for (i = 0; i < MAX_CNT; i++)
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syscall(__NR_getegid);
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printf("%d:percpu_hash_map_perf kmalloc %lld events per sec\n",
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cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
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}
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static void loop(int cpu)
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{
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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CPU_SET(cpu, &cpuset);
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sched_setaffinity(0, sizeof(cpuset), &cpuset);
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if (test_flags & HASH_PREALLOC)
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test_hash_prealloc(cpu);
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if (test_flags & PERCPU_HASH_PREALLOC)
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test_percpu_hash_prealloc(cpu);
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if (test_flags & HASH_KMALLOC)
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test_hash_kmalloc(cpu);
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if (test_flags & PERCPU_HASH_KMALLOC)
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test_percpu_hash_kmalloc(cpu);
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}
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static void run_perf_test(int tasks)
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{
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pid_t pid[tasks];
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int i;
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for (i = 0; i < tasks; i++) {
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pid[i] = fork();
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if (pid[i] == 0) {
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loop(i);
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exit(0);
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} else if (pid[i] == -1) {
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printf("couldn't spawn #%d process\n", i);
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exit(1);
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}
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}
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for (i = 0; i < tasks; i++) {
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int status;
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assert(waitpid(pid[i], &status, 0) == pid[i]);
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assert(status == 0);
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}
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}
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int main(int argc, char **argv)
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{
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struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
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char filename[256];
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int num_cpu = 8;
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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setrlimit(RLIMIT_MEMLOCK, &r);
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if (argc > 1)
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test_flags = atoi(argv[1]) ? : test_flags;
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if (argc > 2)
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num_cpu = atoi(argv[2]) ? : num_cpu;
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if (load_bpf_file(filename)) {
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printf("%s", bpf_log_buf);
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return 1;
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}
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run_perf_test(num_cpu);
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return 0;
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}
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