| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20230719204910.539044-2-acme@kernel.org>
Date: Wed, 19 Jul 2023 17:49:06 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Clark Williams <williams@...hat.com>,
Kate Carcia <kcarcia@...hat.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Andre Fredette <anfredet@...hat.com>,
Dave Tucker <datucker@...hat.com>,
Derek Barbosa <debarbos@...hat.com>,
Masami Hiramatsu <mhiramat@...nel.org>
Subject: [PATCH 1/5] perf bench uprobe: Add benchmark to test uprobe overhead
From: Arnaldo Carvalho de Melo <acme@...hat.com>
This just adds the initial "workload", a call to libc's usleep(1000us)
function:
$ perf stat --null perf bench uprobe all
# Running uprobe/baseline benchmark...
# Executed 1000 usleep(1000) calls
Total time: 1053533 usecs
1053.533 usecs/op
Performance counter stats for 'perf bench uprobe all':
1.061042896 seconds time elapsed
0.001079000 seconds user
0.006499000 seconds sys
$
More entries will be added using a BPF skel to add various uprobes to
the usleep() function.
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andre Fredette <anfredet@...hat.com>
Cc: Clark Williams <williams@...hat.com>
Cc: Dave Tucker <datucker@...hat.com>
Cc: Derek Barbosa <debarbos@...hat.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/Documentation/perf-bench.txt | 3 +
tools/perf/bench/Build | 1 +
tools/perf/bench/bench.h | 1 +
tools/perf/bench/uprobe.c | 80 +++++++++++++++++++++++++
tools/perf/builtin-bench.c | 6 ++
5 files changed, 91 insertions(+)
create mode 100644 tools/perf/bench/uprobe.c
diff --git a/tools/perf/Documentation/perf-bench.txt b/tools/perf/Documentation/perf-bench.txt
index f04f0eaded985fc8..ca5789625cd2b8e5 100644
--- a/tools/perf/Documentation/perf-bench.txt
+++ b/tools/perf/Documentation/perf-bench.txt
@@ -67,6 +67,9 @@ SUBSYSTEM
'internals'::
Benchmark internal perf functionality.
+'uprobe'::
+ Benchmark overhead of uprobe + BPF.
+
'all'::
All benchmark subsystems.
diff --git a/tools/perf/bench/Build b/tools/perf/bench/Build
index 0f158dc8139bbd0d..47412d47dccfeff2 100644
--- a/tools/perf/bench/Build
+++ b/tools/perf/bench/Build
@@ -16,6 +16,7 @@ perf-y += inject-buildid.o
perf-y += evlist-open-close.o
perf-y += breakpoint.o
perf-y += pmu-scan.o
+perf-y += uprobe.o
perf-$(CONFIG_X86_64) += mem-memcpy-x86-64-asm.o
perf-$(CONFIG_X86_64) += mem-memset-x86-64-asm.o
diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 0d2b65976212333a..201311f75c964df2 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -42,6 +42,7 @@ int bench_inject_build_id(int argc, const char **argv);
int bench_evlist_open_close(int argc, const char **argv);
int bench_breakpoint_thread(int argc, const char **argv);
int bench_breakpoint_enable(int argc, const char **argv);
+int bench_uprobe_baseline(int argc, const char **argv);
int bench_pmu_scan(int argc, const char **argv);
#define BENCH_FORMAT_DEFAULT_STR "default"
diff --git a/tools/perf/bench/uprobe.c b/tools/perf/bench/uprobe.c
new file mode 100644
index 0000000000000000..707174220a76701f
--- /dev/null
+++ b/tools/perf/bench/uprobe.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * uprobe.c
+ *
+ * uprobe benchmarks
+ *
+ * Copyright (C) 2023, Red Hat Inc, Arnaldo Carvalho de Melo <acme@...hat.com>
+ */
+#include "../perf.h"
+#include "../util/util.h"
+#include <subcmd/parse-options.h>
+#include "../builtin.h"
+#include "bench.h"
+#include <linux/time64.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#define LOOPS_DEFAULT 1000
+static int loops = LOOPS_DEFAULT;
+
+static const struct option options[] = {
+ OPT_INTEGER('l', "loop", &loops, "Specify number of loops"),
+ OPT_END()
+};
+
+static const char * const bench_uprobe_usage[] = {
+ "perf bench uprobe <options>",
+ NULL
+};
+
+static int bench_uprobe(int argc, const char **argv)
+{
+ const char *name = "usleep(1000)", *unit = "usec";
+ struct timespec start, end;
+ u64 diff;
+ int i;
+
+ argc = parse_options(argc, argv, options, bench_uprobe_usage, 0);
+
+ clock_gettime(CLOCK_REALTIME, &start);
+
+ for (i = 0; i < loops; i++) {
+ usleep(USEC_PER_MSEC);
+ }
+
+ clock_gettime(CLOCK_REALTIME, &end);
+
+ diff = end.tv_sec * NSEC_PER_SEC + end.tv_nsec - (start.tv_sec * NSEC_PER_SEC + start.tv_nsec);
+ diff /= NSEC_PER_USEC;
+
+ switch (bench_format) {
+ case BENCH_FORMAT_DEFAULT:
+ printf("# Executed %'d %s calls\n", loops, name);
+ printf(" %14s: %'" PRIu64 " %ss\n\n", "Total time", diff, unit);
+ printf(" %'.3f %ss/op\n", (double)diff / (double)loops, unit);
+ break;
+
+ case BENCH_FORMAT_SIMPLE:
+ printf("%" PRIu64 "\n", diff);
+ break;
+
+ default:
+ /* reaching here is something of a disaster */
+ fprintf(stderr, "Unknown format:%d\n", bench_format);
+ exit(1);
+ }
+
+ return 0;
+}
+
+int bench_uprobe_baseline(int argc, const char **argv)
+{
+ return bench_uprobe(argc, argv);
+}
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index db435b791a09b69b..09637aee83413e63 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -104,6 +104,11 @@ static struct bench breakpoint_benchmarks[] = {
{ NULL, NULL, NULL },
};
+static struct bench uprobe_benchmarks[] = {
+ { "baseline", "Baseline libc usleep(1000) call", bench_uprobe_baseline, },
+ { NULL, NULL, NULL },
+};
+
struct collection {
const char *name;
const char *summary;
@@ -123,6 +128,7 @@ static struct collection collections[] = {
#endif
{ "internals", "Perf-internals benchmarks", internals_benchmarks },
{ "breakpoint", "Breakpoint benchmarks", breakpoint_benchmarks },
+ { "uprobe", "uprobe benchmarks", uprobe_benchmarks },
{ "all", "All benchmarks", NULL },
{ NULL, NULL, NULL }
};
--
2.41.0
Powered by blists - more mailing lists