Home | History | Annotate | Download | only in tests 
      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "benchmark.h"
     18 #include <unistd.h>
     19 
     20 #define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
     21 #include <sys/_system_properties.h>
     22 
     23 #include <vector>
     24 #include <string>
     25 
     26 extern void *__system_property_area__;
     27 
     28 #define TEST_NUM_PROPS \
     29     Arg(1)->Arg(4)->Arg(16)->Arg(64)->Arg(128)->Arg(256)->Arg(512)->Arg(1024)
     30 
     31 struct LocalPropertyTestState {
     32     LocalPropertyTestState(int nprops) : nprops(nprops), valid(false) {
     33         static const char prop_name_chars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_";
     34 
     35         char dir_template[] = "/data/local/tmp/prop-XXXXXX";
     36         char *dirname = mkdtemp(dir_template);
     37         if (!dirname) {
     38             perror("making temp file for test state failed (is /data/local/tmp writable?)");
     39             return;
     40         }
     41 
     42         old_pa = __system_property_area__;
     43         __system_property_area__ = NULL;
     44 
     45         pa_dirname = dirname;
     46         pa_filename = pa_dirname + "/__properties__";
     47 
     48         __system_property_set_filename(pa_filename.c_str());
     49         __system_property_area_init();
     50 
     51         names = new char* [nprops];
     52         name_lens = new int[nprops];
     53         values = new char* [nprops];
     54         value_lens = new int[nprops];
     55 
     56         srandom(nprops);
     57 
     58         for (int i = 0; i < nprops; i++) {
     59             name_lens[i] = random() % PROP_NAME_MAX;
     60             names[i] = new char[PROP_NAME_MAX + 1];
     61             for (int j = 0; j < name_lens[i]; j++) {
     62                 names[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
     63             }
     64             names[i][name_lens[i]] = 0;
     65             value_lens[i] = random() % PROP_VALUE_MAX;
     66             values[i] = new char[PROP_VALUE_MAX];
     67             for (int j = 0; j < value_lens[i]; j++) {
     68                 values[i][j] = prop_name_chars[random() % (sizeof(prop_name_chars) - 1)];
     69             }
     70             __system_property_add(names[i], name_lens[i], values[i], value_lens[i]);
     71         }
     72 
     73         valid = true;
     74     }
     75 
     76     ~LocalPropertyTestState() {
     77         if (!valid)
     78             return;
     79 
     80         __system_property_area__ = old_pa;
     81 
     82         __system_property_set_filename(PROP_FILENAME);
     83         unlink(pa_filename.c_str());
     84         rmdir(pa_dirname.c_str());
     85 
     86         for (int i = 0; i < nprops; i++) {
     87             delete names[i];
     88             delete values[i];
     89         }
     90         delete[] names;
     91         delete[] name_lens;
     92         delete[] values;
     93         delete[] value_lens;
     94     }
     95 public:
     96     const int nprops;
     97     char **names;
     98     int *name_lens;
     99     char **values;
    100     int *value_lens;
    101     bool valid;
    102 
    103 private:
    104     std::string pa_dirname;
    105     std::string pa_filename;
    106     void *old_pa;
    107 };
    108 
    109 static void BM_property_get(int iters, int nprops)
    110 {
    111     StopBenchmarkTiming();
    112 
    113     LocalPropertyTestState pa(nprops);
    114     char value[PROP_VALUE_MAX];
    115 
    116     if (!pa.valid)
    117         return;
    118 
    119     srandom(iters * nprops);
    120 
    121     StartBenchmarkTiming();
    122 
    123     for (int i = 0; i < iters; i++) {
    124         __system_property_get(pa.names[random() % nprops], value);
    125     }
    126     StopBenchmarkTiming();
    127 }
    128 BENCHMARK(BM_property_get)->TEST_NUM_PROPS;
    129 
    130 static void BM_property_find(int iters, int nprops)
    131 {
    132     StopBenchmarkTiming();
    133 
    134     LocalPropertyTestState pa(nprops);
    135 
    136     if (!pa.valid)
    137         return;
    138 
    139     srandom(iters * nprops);
    140 
    141     StartBenchmarkTiming();
    142 
    143     for (int i = 0; i < iters; i++) {
    144         __system_property_find(pa.names[random() % nprops]);
    145     }
    146     StopBenchmarkTiming();
    147 }
    148 BENCHMARK(BM_property_find)->TEST_NUM_PROPS;
    149