1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "clock_filter.h"
17 #include <algorithm>
18 #include <map>
19
20 namespace SysTuning {
21 namespace TraceStreamer {
ClockFilter(TraceDataCache * dataCache,const TraceStreamerFilters * filter)22 ClockFilter::ClockFilter(TraceDataCache* dataCache, const TraceStreamerFilters* filter)
23 : FilterBase(dataCache, filter), primaryClock_(BuiltinClocks::TS_CLOCK_BOOTTIME), dataCache_(dataCache)
24 {
25 }
26
~ClockFilter()27 ClockFilter::~ClockFilter() {}
28
GenClockKey(ClockId srcClockId,ClockId desClockId)29 std::string ClockFilter::GenClockKey(ClockId srcClockId, ClockId desClockId)
30 {
31 std::string ret;
32 ret += std::to_string(srcClockId);
33 ret += ",";
34 ret += std::to_string(desClockId);
35 return ret;
36 }
37
ToPrimaryTraceTime(ClockId srcClockId,uint64_t srcTs) const38 uint64_t ClockFilter::ToPrimaryTraceTime(ClockId srcClockId, uint64_t srcTs) const
39 {
40 if (srcClockId == primaryClock_) {
41 return srcTs;
42 }
43 return Convert(srcClockId, srcTs, primaryClock_);
44 }
45
Convert(ClockId srcClockId,uint64_t srcTs,ClockId desClockId) const46 uint64_t ClockFilter::Convert(ClockId srcClockId, uint64_t srcTs, ClockId desClockId) const
47 {
48 std::string&& clockKey = GenClockKey(srcClockId, desClockId);
49 auto keyIt = clockMaps_.find(clockKey);
50 if (keyIt == clockMaps_.end()) {
51 return srcTs;
52 }
53
54 auto tsIt = keyIt->second.upper_bound(srcTs);
55 if (tsIt != keyIt->second.begin()) {
56 tsIt--;
57 }
58
59 if (tsIt->second >= 0) {
60 return srcTs + static_cast<uint64_t>(tsIt->second);
61 } else {
62 return srcTs - static_cast<uint64_t>(0 - tsIt->second);
63 }
64 }
65
AddConvertClockMap(ClockId srcClockId,ClockId dstClockId,uint64_t srcTs,uint64_t dstTs)66 void ClockFilter::AddConvertClockMap(ClockId srcClockId, ClockId dstClockId, uint64_t srcTs, uint64_t dstTs)
67 {
68 std::string&& clockKey = GenClockKey(srcClockId, dstClockId);
69 auto keyIt = clockMaps_.find(clockKey);
70 if (keyIt == clockMaps_.end()) {
71 ConvertClockMap newConvertMap = {{srcTs, dstTs - srcTs}};
72 clockMaps_[clockKey] = newConvertMap;
73 } else {
74 clockMaps_[clockKey].insert(std::make_pair(srcTs, dstTs - srcTs));
75 }
76 }
77
AddClockSnapshot(const std::vector<SnapShot> & snapShot)78 void ClockFilter::AddClockSnapshot(const std::vector<SnapShot>& snapShot)
79 {
80 ClockId srcId, desId;
81 const int theDataBeforeLast = 2;
82 for (srcId = 0; srcId < snapShot.size() - 1; srcId++) {
83 ClockId srcClockId = snapShot[srcId].clockId;
84 uint64_t srcTs = snapShot[srcId].ts;
85 traceDataCache_->GetClockSnapshotData()->AppendNewSnapshot(srcClockId,
86 srcTs, dataCache_->GetConstStatAndInfo().clockid2ClockNameMap_.at(static_cast<BuiltinClocks>(srcClockId)));
87 for (desId = srcId + 1; desId < snapShot.size(); desId++) {
88 ClockId desClockId = snapShot[desId].clockId;
89 uint64_t desTs = snapShot[desId].ts;
90 if ((srcId == snapShot.size() - theDataBeforeLast) and (desId == snapShot.size() - 1)) {
91 traceDataCache_->GetClockSnapshotData()->AppendNewSnapshot(desClockId, desTs,
92 dataCache_->GetConstStatAndInfo().clockid2ClockNameMap_.at(static_cast<BuiltinClocks>(desClockId)));
93 }
94 AddConvertClockMap(srcClockId, desClockId, srcTs, desTs);
95 AddConvertClockMap(desClockId, srcClockId, desTs, srcTs);
96 }
97 }
98 hasInitSnapShot_ = true;
99 }
100 } // namespace TraceStreamer
101 } // namespace SysTuning
102