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perf test: Add deterministic workload

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Add a workload that does the same thing every time for testing CPU trace
decoding.

Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Amir Ayupov <aaupov@meta.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mike Leach <mike.leach@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paschalis Mpeis <Paschalis.Mpeis@arm.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2026-06-09 15:40:10 +01:00 committed by Arnaldo Carvalho de Melo
parent be7ef892f3
commit 3fdf30607e
5 changed files with 45 additions and 2 deletions
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4
tools/perf/Documentation/perf-test.txt
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@ -57,7 +57,7 @@ OPTIONS
--workload=::
Run a built-in workload, to list them use '--list-workloads', current
ones include: noploop, thloop, leafloop, sqrtloop, brstack, datasym,
context_switch_loop and landlock.
context_switch_loop, deterministic and landlock.
Used with the shell script regression tests.
@ -66,7 +66,7 @@ OPTIONS
seconds: leafloop, noploop, sqrtloop, thloop
nrloops: brstack, context_switch_loop
The datasym and landlock workloads don't accept any.
The datasym, landlock and deterministic workloads don't accept any.
--list-workloads::
List the available workloads to use with -w/--workload.

1
tools/perf/tests/builtin-test.c
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@ -164,6 +164,7 @@ static struct test_workload *workloads[] = {
&workload__inlineloop,
&workload__jitdump,
&workload__context_switch_loop,
&workload__deterministic,
#ifdef HAVE_RUST_SUPPORT
&workload__code_with_type,

1
tools/perf/tests/tests.h
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@ -246,6 +246,7 @@ DECLARE_WORKLOAD(traploop);
DECLARE_WORKLOAD(inlineloop);
DECLARE_WORKLOAD(jitdump);
DECLARE_WORKLOAD(context_switch_loop);
DECLARE_WORKLOAD(deterministic);
#ifdef HAVE_RUST_SUPPORT
DECLARE_WORKLOAD(code_with_type);

2
tools/perf/tests/workloads/Build
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@ -11,6 +11,7 @@ perf-test-y += traploop.o
perf-test-y += inlineloop.o
perf-test-y += jitdump.o
perf-test-y += context_switch_loop.o
perf-test-y += deterministic.o
ifeq ($(CONFIG_RUST_SUPPORT),y)
perf-test-y += code_with_type.o
@ -23,3 +24,4 @@ CFLAGS_brstack.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_datasym.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_traploop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_inlineloop.o = -g -O2
CFLAGS_deterministic.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE

39
tools/perf/tests/workloads/deterministic.c Normal file
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@ -0,0 +1,39 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include "../tests.h"
int dt_work = 1234;
static void function1(void)
{
dt_work += 7;
dt_work += 7;
dt_work += 7;
}
static void function2(void)
{
dt_work += 7;
dt_work += 7;
dt_work += 7;
}
static int deterministic(int argc __maybe_unused,
const char **argv __maybe_unused)
{
dt_work += 7;
dt_work += 7;
dt_work += 7;
function1();
dt_work += 7;
dt_work += 7;
dt_work += 7;
function2();
return 0;
}
DEFINE_WORKLOAD(deterministic);