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55de170382
Needed to adjust max locked memory RLIMIT_MEMLOCK for testing these bpf samples as these are using more and larger maps than can fit in distro default 64Kbytes limit. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <string.h>
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#include <time.h>
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#include <linux/bpf.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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struct pair {
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long long val;
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__u64 ip;
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};
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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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static void print_old_objects(int fd)
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{
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long long val = time_get_ns();
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__u64 key, next_key;
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struct pair v;
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key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */
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key = -1;
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while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
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bpf_map_lookup_elem(map_fd[0], &next_key, &v);
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key = next_key;
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if (val - v.val < 1000000000ll)
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/* object was allocated more then 1 sec ago */
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continue;
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printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
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next_key, (val - v.val) / 1000000000ll, v.ip);
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}
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}
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int main(int ac, 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 i;
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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if (setrlimit(RLIMIT_MEMLOCK, &r)) {
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perror("setrlimit(RLIMIT_MEMLOCK, RLIM_INFINITY)");
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return 1;
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}
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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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for (i = 0; ; i++) {
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print_old_objects(map_fd[1]);
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sleep(1);
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}
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return 0;
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}
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