1 /*
2 * Copyright (C) 2015 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 <stdio.h>
18 #include <map>
19 #include <string>
20 #include <vector>
21
22 #include <android-base/logging.h>
23
24 #include "command.h"
25 #include "environment.h"
26 #include "event_attr.h"
27 #include "event_fd.h"
28 #include "event_type.h"
29
PrintEventTypesOfType(uint32_t type,const std::string & type_name,const std::vector<EventType> & event_types)30 static void PrintEventTypesOfType(uint32_t type, const std::string& type_name,
31 const std::vector<EventType>& event_types) {
32 printf("List of %s:\n", type_name.c_str());
33 for (auto& event_type : event_types) {
34 if (event_type.type == type) {
35 perf_event_attr attr = CreateDefaultPerfEventAttr(event_type);
36 // Exclude kernel to list supported events even when
37 // /proc/sys/kernel/perf_event_paranoid is 2.
38 attr.exclude_kernel = 1;
39 if (IsEventAttrSupportedByKernel(attr)) {
40 printf(" %s\n", event_type.name.c_str());
41 }
42 }
43 }
44 printf("\n");
45 }
46
47 class ListCommand : public Command {
48 public:
ListCommand()49 ListCommand()
50 : Command("list", "list available event types",
51 "Usage: simpleperf list [hw|sw|cache|tracepoint]\n"
52 " List all available perf events on this machine.\n") {
53 }
54
55 bool Run(const std::vector<std::string>& args) override;
56 };
57
Run(const std::vector<std::string> & args)58 bool ListCommand::Run(const std::vector<std::string>& args) {
59 if (!CheckPerfEventLimit()) {
60 return false;
61 }
62
63 static std::map<std::string, std::pair<int, std::string>> type_map = {
64 {"hw", {PERF_TYPE_HARDWARE, "hardware events"}},
65 {"sw", {PERF_TYPE_SOFTWARE, "software events"}},
66 {"cache", {PERF_TYPE_HW_CACHE, "hw-cache events"}},
67 {"tracepoint", {PERF_TYPE_TRACEPOINT, "tracepoint events"}},
68 };
69
70 std::vector<std::string> names;
71 if (args.empty()) {
72 for (auto& item : type_map) {
73 names.push_back(item.first);
74 }
75 } else {
76 for (auto& arg : args) {
77 if (type_map.find(arg) != type_map.end()) {
78 names.push_back(arg);
79 } else {
80 LOG(ERROR) << "unknown event type category: " << arg << ", try using \"help list\"";
81 return false;
82 }
83 }
84 }
85
86 auto& event_types = GetAllEventTypes();
87
88 for (auto& name : names) {
89 auto it = type_map.find(name);
90 PrintEventTypesOfType(it->second.first, it->second.second, event_types);
91 }
92 return true;
93 }
94
RegisterListCommand()95 void RegisterListCommand() {
96 RegisterCommand("list", [] { return std::unique_ptr<Command>(new ListCommand); });
97 }
98