[rtems commit] validation: Test CPU performance
Sebastian Huber
sebh at rtems.org
Thu Oct 12 11:53:37 UTC 2023
Module: rtems
Branch: master
Commit: 2cb3d75d9e6097bbc2ccbb36b140c4287b06f6a2
Changeset: http://git.rtems.org/rtems/commit/?id=2cb3d75d9e6097bbc2ccbb36b140c4287b06f6a2
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Sep 29 21:53:42 2023 +0200
validation: Test CPU performance
Measure the runtime of 1000 no-operation instructions. This may help to
investigate runtime measurement variations which do not result from code
generation or source code changes.
The runtime measurement of a function which does nothing and just
returns gives an estimate of the measurement overhead.
Update #3716.
---
.../validation/performance-no-clock-0.yml | 1 +
testsuites/validation/tc-cpu-performance.c | 270 +++++++++++++++++++++
2 files changed, 271 insertions(+)
diff --git a/spec/build/testsuites/validation/performance-no-clock-0.yml b/spec/build/testsuites/validation/performance-no-clock-0.yml
index 5e21f2fcdb..28d1ff7592 100644
--- a/spec/build/testsuites/validation/performance-no-clock-0.yml
+++ b/spec/build/testsuites/validation/performance-no-clock-0.yml
@@ -12,6 +12,7 @@ ldflags: []
links: []
source:
- testsuites/validation/tc-barrier-performance.c
+- testsuites/validation/tc-cpu-performance.c
- testsuites/validation/tc-event-performance.c
- testsuites/validation/tc-message-performance.c
- testsuites/validation/tc-part-performance.c
diff --git a/testsuites/validation/tc-cpu-performance.c b/testsuites/validation/tc-cpu-performance.c
new file mode 100644
index 0000000000..4f090e704f
--- /dev/null
+++ b/testsuites/validation/tc-cpu-performance.c
@@ -0,0 +1,270 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup ScoreCpuValPerf
+ */
+
+/*
+ * Copyright (C) 2023 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file is part of the RTEMS quality process and was automatically
+ * generated. If you find something that needs to be fixed or
+ * worded better please post a report or patch to an RTEMS mailing list
+ * or raise a bug report:
+ *
+ * https://www.rtems.org/bugs.html
+ *
+ * For information on updating and regenerating please refer to the How-To
+ * section in the Software Requirements Engineering chapter of the
+ * RTEMS Software Engineering manual. The manual is provided as a part of
+ * a release. For development sources please refer to the online
+ * documentation at:
+ *
+ * https://docs.rtems.org
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/score/cpuimpl.h>
+
+#include "tx-support.h"
+
+#include <rtems/test.h>
+
+/**
+ * @defgroup ScoreCpuValPerf spec:/score/cpu/val/perf
+ *
+ * @ingroup TestsuitesPerformanceNoClock0
+ *
+ * @brief This test case provides a context to run CPU port performance tests.
+ *
+ * @{
+ */
+
+/**
+ * @brief Test context for spec:/score/cpu/val/perf test case.
+ */
+typedef struct {
+ /**
+ * @brief This member references the measure runtime context.
+ */
+ T_measure_runtime_context *context;
+
+ /**
+ * @brief This member provides the measure runtime request.
+ */
+ T_measure_runtime_request request;
+
+ /**
+ * @brief This member provides an optional measurement begin time point.
+ */
+ T_ticks begin;
+
+ /**
+ * @brief This member provides an optional measurement end time point.
+ */
+ T_ticks end;
+} ScoreCpuValPerf_Context;
+
+static ScoreCpuValPerf_Context
+ ScoreCpuValPerf_Instance;
+
+static void ScoreCpuValPerf_Setup_Context( ScoreCpuValPerf_Context *ctx )
+{
+ T_measure_runtime_config config;
+
+ memset( &config, 0, sizeof( config ) );
+ config.sample_count = 100;
+ ctx->request.arg = ctx;
+ ctx->request.flags = T_MEASURE_RUNTIME_REPORT_SAMPLES;
+ ctx->context = T_measure_runtime_create( &config );
+ T_assert_not_null( ctx->context );
+}
+
+static void ScoreCpuValPerf_Setup_Wrap( void *arg )
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = arg;
+ ScoreCpuValPerf_Setup_Context( ctx );
+}
+
+static T_fixture ScoreCpuValPerf_Fixture = {
+ .setup = ScoreCpuValPerf_Setup_Wrap,
+ .stop = NULL,
+ .teardown = NULL,
+ .scope = NULL,
+ .initial_context = &ScoreCpuValPerf_Instance
+};
+
+/**
+ * @defgroup ScoreCpuReqPerfEmpty spec:/score/cpu/req/perf-empty
+ *
+ * @{
+ */
+
+/**
+ * @brief Do nothing and just return.
+ */
+static void ScoreCpuReqPerfEmpty_Body( ScoreCpuValPerf_Context *ctx )
+{
+ /* No code */
+}
+
+static void ScoreCpuReqPerfEmpty_Body_Wrap( void *arg )
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = arg;
+ ScoreCpuReqPerfEmpty_Body( ctx );
+}
+
+/**
+ * @brief Discard samples interrupted by a clock tick.
+ */
+static bool ScoreCpuReqPerfEmpty_Teardown(
+ ScoreCpuValPerf_Context *ctx,
+ T_ticks *delta,
+ uint32_t tic,
+ uint32_t toc,
+ unsigned int retry
+)
+{
+ return tic == toc;
+}
+
+static bool ScoreCpuReqPerfEmpty_Teardown_Wrap(
+ void *arg,
+ T_ticks *delta,
+ uint32_t tic,
+ uint32_t toc,
+ unsigned int retry
+)
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = arg;
+ return ScoreCpuReqPerfEmpty_Teardown( ctx, delta, tic, toc, retry );
+}
+
+/** @} */
+
+/**
+ * @defgroup ScoreCpuReqPerfNops spec:/score/cpu/req/perf-nops
+ *
+ * @{
+ */
+
+/**
+ * @brief Execute exactly 1000 no-operation instructions.
+ */
+static void ScoreCpuReqPerfNops_Body( ScoreCpuValPerf_Context *ctx )
+{
+ #define NOPS_10 \
+ _CPU_Instruction_no_operation(); _CPU_Instruction_no_operation(); \
+ _CPU_Instruction_no_operation(); _CPU_Instruction_no_operation(); \
+ _CPU_Instruction_no_operation(); _CPU_Instruction_no_operation(); \
+ _CPU_Instruction_no_operation(); _CPU_Instruction_no_operation(); \
+ _CPU_Instruction_no_operation(); _CPU_Instruction_no_operation();
+ #define NOPS_100 NOPS_10 NOPS_10 NOPS_10 NOPS_10 NOPS_10 NOPS_10 NOPS_10 \
+ NOPS_10 NOPS_10 NOPS_10
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+ NOPS_100
+}
+
+static void ScoreCpuReqPerfNops_Body_Wrap( void *arg )
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = arg;
+ ScoreCpuReqPerfNops_Body( ctx );
+}
+
+/**
+ * @brief Discard samples interrupted by a clock tick.
+ */
+static bool ScoreCpuReqPerfNops_Teardown(
+ ScoreCpuValPerf_Context *ctx,
+ T_ticks *delta,
+ uint32_t tic,
+ uint32_t toc,
+ unsigned int retry
+)
+{
+ return tic == toc;
+}
+
+static bool ScoreCpuReqPerfNops_Teardown_Wrap(
+ void *arg,
+ T_ticks *delta,
+ uint32_t tic,
+ uint32_t toc,
+ unsigned int retry
+)
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = arg;
+ return ScoreCpuReqPerfNops_Teardown( ctx, delta, tic, toc, retry );
+}
+
+/** @} */
+
+/**
+ * @fn void T_case_body_ScoreCpuValPerf( void )
+ */
+T_TEST_CASE_FIXTURE( ScoreCpuValPerf, &ScoreCpuValPerf_Fixture )
+{
+ ScoreCpuValPerf_Context *ctx;
+
+ ctx = T_fixture_context();
+
+ ctx->request.name = "ScoreCpuReqPerfEmpty";
+ ctx->request.setup = NULL;
+ ctx->request.body = ScoreCpuReqPerfEmpty_Body_Wrap;
+ ctx->request.teardown = ScoreCpuReqPerfEmpty_Teardown_Wrap;
+ T_measure_runtime( ctx->context, &ctx->request );
+
+ ctx->request.name = "ScoreCpuReqPerfNops";
+ ctx->request.setup = NULL;
+ ctx->request.body = ScoreCpuReqPerfNops_Body_Wrap;
+ ctx->request.teardown = ScoreCpuReqPerfNops_Teardown_Wrap;
+ T_measure_runtime( ctx->context, &ctx->request );
+}
+
+/** @} */
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