1 /*
2 * Copyright (C) 2018 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 #include <vector>
17 #include "benchmark/benchmark.h"
18 #include "logd/LogEvent.h"
19
20 namespace android {
21 namespace os {
22 namespace statsd {
23
24 using std::vector;
25
26 /* Special markers for android_log_list_element type */
27 static const char EVENT_TYPE_LIST_STOP = '\n'; /* declare end of list */
28 static const char EVENT_TYPE_UNKNOWN = '?'; /* protocol error */
29
30 static const char EVENT_TYPE_INT = 0;
31 static const char EVENT_TYPE_LONG = 1;
32 static const char EVENT_TYPE_STRING = 2;
33 static const char EVENT_TYPE_LIST = 3;
34 static const char EVENT_TYPE_FLOAT = 4;
35
36 static const int kLogMsgHeaderSize = 28;
37
write4Bytes(int val,vector<char> * buffer)38 static void write4Bytes(int val, vector<char>* buffer) {
39 buffer->push_back(static_cast<char>(val));
40 buffer->push_back(static_cast<char>((val >> 8) & 0xFF));
41 buffer->push_back(static_cast<char>((val >> 16) & 0xFF));
42 buffer->push_back(static_cast<char>((val >> 24) & 0xFF));
43 }
44
getSimpleLogMsgData(log_msg * msg)45 static void getSimpleLogMsgData(log_msg* msg) {
46 vector<char> buffer;
47 // stats_log tag id
48 write4Bytes(1937006964, &buffer);
49 buffer.push_back(EVENT_TYPE_LIST);
50 buffer.push_back(2); // field counts;
51 buffer.push_back(EVENT_TYPE_INT);
52 write4Bytes(10 /* atom id */, &buffer);
53 buffer.push_back(EVENT_TYPE_INT);
54 write4Bytes(99 /* a value to log*/, &buffer);
55 buffer.push_back(EVENT_TYPE_LIST_STOP);
56
57 msg->entry.len = buffer.size();
58 msg->entry.hdr_size = kLogMsgHeaderSize;
59 msg->entry.sec = time(nullptr);
60 std::copy(buffer.begin(), buffer.end(), msg->buf + kLogMsgHeaderSize);
61 }
62
BM_LogEventCreation(benchmark::State & state)63 static void BM_LogEventCreation(benchmark::State& state) {
64 log_msg msg;
65 getSimpleLogMsgData(&msg);
66 while (state.KeepRunning()) {
67 benchmark::DoNotOptimize(LogEvent(msg));
68 }
69 }
70 BENCHMARK(BM_LogEventCreation);
71
72 } // namespace statsd
73 } // namespace os
74 } // namespace android
75