7d90cfa6b5
The properties benchmarks were reading n properties from a property area with n properties in it, which was making it hard to compare the time between runs of different sizes. Change the benchmark to read a random property per iteration so the numbers between runs are comparable. Change-Id: Ib1648ce0948d9038fce76d209608427376cfb8da
116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "benchmark.h"
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#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
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#include <sys/_system_properties.h>
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#include <vector>
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extern void *__system_property_area__;
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#define TEST_NUM_PROPS \
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Arg(1)->Arg(4)->Arg(16)->Arg(64)->Arg(128)->Arg(247)
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struct LocalPropertyTestState {
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LocalPropertyTestState(int nprops) : nprops(nprops) {
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static const char prop_name_chars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_";
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old_pa = __system_property_area__;
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pa = malloc(PA_SIZE);
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__system_property_area_init(pa);
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names = new char* [nprops];
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name_lens = new int[nprops];
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values = new char* [nprops];
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value_lens = new int[nprops];
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srandom(nprops);
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for (int i = 0; i < nprops; i++) {
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name_lens[i] = random() % PROP_NAME_MAX;
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names[i] = new char[PROP_NAME_MAX + 1];
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for (int j = 0; j < name_lens[i]; j++) {
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names[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
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}
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names[i][name_lens[i]] = 0;
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value_lens[i] = random() % PROP_VALUE_MAX;
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values[i] = new char[PROP_VALUE_MAX];
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for (int j = 0; j < value_lens[i]; j++) {
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values[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
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}
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__system_property_add(names[i], name_lens[i], values[i], value_lens[i]);
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}
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}
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~LocalPropertyTestState() {
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__system_property_area__ = old_pa;
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for (int i = 0; i < nprops; i++) {
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delete names[i];
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delete values[i];
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}
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delete names;
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delete name_lens;
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delete values;
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delete value_lens;
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free(pa);
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}
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public:
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const int nprops;
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char **names;
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int *name_lens;
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char **values;
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int *value_lens;
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private:
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void *pa;
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void *old_pa;
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};
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static void BM_property_get(int iters, int nprops)
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{
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StopBenchmarkTiming();
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LocalPropertyTestState pa(nprops);
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char value[PROP_VALUE_MAX];
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srandom(iters * nprops);
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StartBenchmarkTiming();
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for (int i = 0; i < iters; i++) {
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__system_property_get(pa.names[random() % nprops], value);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_property_get)->TEST_NUM_PROPS;
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static void BM_property_find(int iters, int nprops)
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{
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StopBenchmarkTiming();
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LocalPropertyTestState pa(nprops);
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srandom(iters * nprops);
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StartBenchmarkTiming();
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for (int i = 0; i < iters; i++) {
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__system_property_find(pa.names[random() % nprops]);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_property_find)->TEST_NUM_PROPS;
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