perf bench uprobe: Add uretprobe variant of uprobe benchmarks

Name benchmarks with _ret at the end to avoid creating a new set of
benchmarks.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrei Vagin <avagin@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240406040911.1603801-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/bench/bench.h

@@ -46,6 +46,8 @@ int bench_breakpoint_enable(int argc, const char **argv);
 int bench_uprobe_baseline(int argc, const char **argv);
 int bench_uprobe_empty(int argc, const char **argv);
 int bench_uprobe_trace_printk(int argc, const char **argv);
+int bench_uprobe_empty_ret(int argc, const char **argv);
+int bench_uprobe_trace_printk_ret(int argc, const char **argv);
 int bench_pmu_scan(int argc, const char **argv);
 
 #define BENCH_FORMAT_DEFAULT_STR	"default"

tools/perf/bench/uprobe.c

@@ -29,6 +29,8 @@ enum bench_uprobe {
 	BENCH_UPROBE__BASELINE,
 	BENCH_UPROBE__EMPTY,
 	BENCH_UPROBE__TRACE_PRINTK,
+	BENCH_UPROBE__EMPTY_RET,
+	BENCH_UPROBE__TRACE_PRINTK_RET,
 };
 
 static const struct option options[] = {
@@ -81,6 +83,8 @@ static int bench_uprobe__setup_bpf_skel(enum bench_uprobe bench)
 	case BENCH_UPROBE__BASELINE:							break;
 	case BENCH_UPROBE__EMPTY:	 bench_uprobe__attach_uprobe(empty);		break;
 	case BENCH_UPROBE__TRACE_PRINTK: bench_uprobe__attach_uprobe(trace_printk);	break;
+	case BENCH_UPROBE__EMPTY_RET:	 bench_uprobe__attach_uprobe(empty_ret);	break;
+	case BENCH_UPROBE__TRACE_PRINTK_RET: bench_uprobe__attach_uprobe(trace_printk_ret); break;
 	default:
 		fprintf(stderr, "Invalid bench: %d\n", bench);
 		goto cleanup;
@@ -197,3 +201,13 @@ int bench_uprobe_trace_printk(int argc, const char **argv)
 {
 	return bench_uprobe(argc, argv, BENCH_UPROBE__TRACE_PRINTK);
 }
+
+int bench_uprobe_empty_ret(int argc, const char **argv)
+{
+	return bench_uprobe(argc, argv, BENCH_UPROBE__EMPTY_RET);
+}
+
+int bench_uprobe_trace_printk_ret(int argc, const char **argv)
+{
+	return bench_uprobe(argc, argv, BENCH_UPROBE__TRACE_PRINTK_RET);
+}

tools/perf/builtin-bench.c

@@ -109,6 +109,8 @@ static struct bench uprobe_benchmarks[] = {
 	{ "baseline",	"Baseline libc usleep(1000) call",				bench_uprobe_baseline,	},
 	{ "empty",	"Attach empty BPF prog to uprobe on usleep, system wide",	bench_uprobe_empty,	},
 	{ "trace_printk", "Attach trace_printk BPF prog to uprobe on usleep syswide",	bench_uprobe_trace_printk,	},
+	{ "empty_ret",	"Attach empty BPF prog to uretprobe on usleep, system wide",	bench_uprobe_empty_ret,	},
+	{ "trace_printk_ret", "Attach trace_printk BPF prog to uretprobe on usleep syswide", bench_uprobe_trace_printk_ret,},
 	{ NULL,	NULL, NULL },
 };
 

tools/perf/util/bpf_skel/bench_uprobe.bpf.c

@@ -4,6 +4,7 @@
 #include <bpf/bpf_tracing.h>
 
 unsigned int nr_uprobes;
+unsigned int nr_uretprobes;
 
 SEC("uprobe")
 int BPF_UPROBE(empty)
@@ -20,4 +21,19 @@ int BPF_UPROBE(trace_printk)
 	return 0;
 }
 
+SEC("uretprobe")
+int BPF_URETPROBE(empty_ret)
+{
+	return 0;
+}
+
+SEC("uretprobe")
+int BPF_URETPROBE(trace_printk_ret)
+{
+	char fmt[] = "perf bench uretprobe %u";
+
+	bpf_trace_printk(fmt, sizeof(fmt), ++nr_uretprobes);
+	return 0;
+}
+
 char LICENSE[] SEC("license") = "Dual BSD/GPL";