1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
7 * Copyright (C) 2023, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
10 #include "../util/util.h"
11 #include <subcmd/parse-options.h>
12 #include "../builtin.h"
14 #include <linux/compiler.h>
15 #include <linux/time64.h>
20 #include <sys/types.h>
25 #define LOOPS_DEFAULT 1000
26 static int loops = LOOPS_DEFAULT;
29 BENCH_UPROBE__BASELINE,
31 BENCH_UPROBE__TRACE_PRINTK,
34 static const struct option options[] = {
35 OPT_INTEGER('l', "loop", &loops, "Specify number of loops"),
39 static const char * const bench_uprobe_usage[] = {
40 "perf bench uprobe <options>",
45 #include "bpf_skel/bench_uprobe.skel.h"
47 #define bench_uprobe__attach_uprobe(prog) \
48 skel->links.prog = bpf_program__attach_uprobe_opts(/*prog=*/skel->progs.prog, \
50 /*binary_path=*/"/lib64/libc.so.6", \
52 /*opts=*/&uprobe_opts); \
53 if (!skel->links.prog) { \
55 fprintf(stderr, "Failed to attach bench uprobe \"%s\": %s\n", #prog, strerror(errno)); \
59 struct bench_uprobe_bpf *skel;
61 static int bench_uprobe__setup_bpf_skel(enum bench_uprobe bench)
63 DECLARE_LIBBPF_OPTS(bpf_uprobe_opts, uprobe_opts);
66 /* Load and verify BPF application */
67 skel = bench_uprobe_bpf__open();
69 fprintf(stderr, "Failed to open and load uprobes bench BPF skeleton\n");
73 err = bench_uprobe_bpf__load(skel);
75 fprintf(stderr, "Failed to load and verify BPF skeleton\n");
79 uprobe_opts.func_name = "usleep";
81 case BENCH_UPROBE__BASELINE: break;
82 case BENCH_UPROBE__EMPTY: bench_uprobe__attach_uprobe(empty); break;
83 case BENCH_UPROBE__TRACE_PRINTK: bench_uprobe__attach_uprobe(trace_printk); break;
85 fprintf(stderr, "Invalid bench: %d\n", bench);
91 bench_uprobe_bpf__destroy(skel);
96 static void bench_uprobe__teardown_bpf_skel(void)
99 bench_uprobe_bpf__destroy(skel);
104 static int bench_uprobe__setup_bpf_skel(enum bench_uprobe bench __maybe_unused) { return 0; }
105 static void bench_uprobe__teardown_bpf_skel(void) {};
108 static int bench_uprobe_format__default_fprintf(const char *name, const char *unit, u64 diff, FILE *fp)
110 static u64 baseline, previous;
111 s64 diff_to_baseline = diff - baseline,
112 diff_to_previous = diff - previous;
113 int printed = fprintf(fp, "# Executed %'d %s calls\n", loops, name);
115 printed += fprintf(fp, " %14s: %'" PRIu64 " %ss", "Total time", diff, unit);
118 printed += fprintf(fp, " %s%'" PRId64 " to baseline", diff_to_baseline > 0 ? "+" : "", diff_to_baseline);
120 if (previous != baseline)
121 fprintf(stdout, " %s%'" PRId64 " to previous", diff_to_previous > 0 ? "+" : "", diff_to_previous);
124 printed += fprintf(fp, "\n\n %'.3f %ss/op", (double)diff / (double)loops, unit);
127 printed += fprintf(fp, " %'.3f %ss/op to baseline", (double)diff_to_baseline / (double)loops, unit);
129 if (previous != baseline)
130 printed += fprintf(fp, " %'.3f %ss/op to previous", (double)diff_to_previous / (double)loops, unit);
142 static int bench_uprobe(int argc, const char **argv, enum bench_uprobe bench)
144 const char *name = "usleep(1000)", *unit = "usec";
145 struct timespec start, end;
149 argc = parse_options(argc, argv, options, bench_uprobe_usage, 0);
151 if (bench != BENCH_UPROBE__BASELINE && bench_uprobe__setup_bpf_skel(bench) < 0)
154 clock_gettime(CLOCK_REALTIME, &start);
156 for (i = 0; i < loops; i++) {
157 usleep(USEC_PER_MSEC);
160 clock_gettime(CLOCK_REALTIME, &end);
162 diff = end.tv_sec * NSEC_PER_SEC + end.tv_nsec - (start.tv_sec * NSEC_PER_SEC + start.tv_nsec);
163 diff /= NSEC_PER_USEC;
165 switch (bench_format) {
166 case BENCH_FORMAT_DEFAULT:
167 bench_uprobe_format__default_fprintf(name, unit, diff, stdout);
170 case BENCH_FORMAT_SIMPLE:
171 printf("%" PRIu64 "\n", diff);
175 /* reaching here is something of a disaster */
176 fprintf(stderr, "Unknown format:%d\n", bench_format);
180 if (bench != BENCH_UPROBE__BASELINE)
181 bench_uprobe__teardown_bpf_skel();
186 int bench_uprobe_baseline(int argc, const char **argv)
188 return bench_uprobe(argc, argv, BENCH_UPROBE__BASELINE);
191 int bench_uprobe_empty(int argc, const char **argv)
193 return bench_uprobe(argc, argv, BENCH_UPROBE__EMPTY);
196 int bench_uprobe_trace_printk(int argc, const char **argv)
198 return bench_uprobe(argc, argv, BENCH_UPROBE__TRACE_PRINTK);