120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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// Copyright (c) 2020 Wenbo Zhang
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//
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// Based on numamove(8) from BPF-Perf-Tools-Book by Brendan Gregg.
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// 8-Jun-2020 Wenbo Zhang Created this.
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#include <argp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <time.h>
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#include <bpf/libbpf.h>
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#include <bpf/bpf.h>
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#include "numamove.skel.h"
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#include "trace_helpers.h"
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static struct env {
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bool verbose;
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} env;
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static volatile bool exiting;
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const char *argp_program_version = "numamove 0.1";
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const char *argp_program_bug_address =
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"https://github.com/iovisor/bcc/tree/master/libbpf-tools";
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const char argp_program_doc[] =
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"Show page migrations of type NUMA misplaced per second.\n"
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"\n"
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"USAGE: numamove [--help]\n"
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"\n"
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"EXAMPLES:\n"
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" numamove # Show page migrations' count and latency";
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static const struct argp_option opts[] = {
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{ "verbose", 'v', NULL, 0, "Verbose debug output" },
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{ NULL, 'h', NULL, OPTION_HIDDEN, "Show the full help" },
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{},
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};
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static error_t parse_arg(int key, char *arg, struct argp_state *state)
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{
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switch (key) {
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case 'h':
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argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
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break;
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case 'v':
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env.verbose = true;
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break;
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default:
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return ARGP_ERR_UNKNOWN;
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}
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return 0;
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}
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static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
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{
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if (level == LIBBPF_DEBUG && !env.verbose)
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return 0;
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return vfprintf(stderr, format, args);
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}
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static void sig_handler(int sig)
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{
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exiting = true;
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}
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int main(int argc, char **argv)
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{
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static const struct argp argp = {
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.options = opts,
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.parser = parse_arg,
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.doc = argp_program_doc,
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};
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struct numamove_bpf *obj;
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struct tm *tm;
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char ts[32];
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time_t t;
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int err;
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err = argp_parse(&argp, argc, argv, 0, NULL, NULL);
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if (err)
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return err;
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libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
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libbpf_set_print(libbpf_print_fn);
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obj = numamove_bpf__open_and_load();
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if (!obj) {
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fprintf(stderr, "failed to open and/or load BPF object\n");
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return 1;
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}
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if (!obj->bss) {
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fprintf(stderr, "Memory-mapping BPF maps is supported starting from Linux 5.7, please upgrade.\n");
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goto cleanup;
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}
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err = numamove_bpf__attach(obj);
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if (err) {
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fprintf(stderr, "failed to attach BPF programs\n");
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goto cleanup;
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}
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signal(SIGINT, sig_handler);
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printf("%-10s %18s %18s\n", "TIME", "NUMA_migrations", "NUMA_migrations_ms");
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while (!exiting) {
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sleep(1);
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time(&t);
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tm = localtime(&t);
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strftime(ts, sizeof(ts), "%H:%M:%S", tm);
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printf("%-10s %18lld %18lld\n", ts,
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__atomic_exchange_n(&obj->bss->num, 0, __ATOMIC_RELAXED),
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__atomic_exchange_n(&obj->bss->latency, 0, __ATOMIC_RELAXED));
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}
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cleanup:
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numamove_bpf__destroy(obj);
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return err != 0;
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}
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