1 /*
2 * Copyright (C) 2010 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 // TODO(b/129481165): remove the #pragma below and fix conversion issues
18 #pragma clang diagnostic push
19 #pragma clang diagnostic ignored "-Wconversion"
20
21 #include <sys/resource.h>
22
23 #include <sched.h>
24
25 #include <android/frameworks/displayservice/1.0/IDisplayService.h>
26 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
27 #include <android/hardware/graphics/allocator/2.0/IAllocator.h>
28 #include <android/hardware/graphics/allocator/3.0/IAllocator.h>
29 #include <binder/IPCThreadState.h>
30 #include <binder/IServiceManager.h>
31 #include <binder/ProcessState.h>
32 #include <configstore/Utils.h>
33 #include <displayservice/DisplayService.h>
34 #include <errno.h>
35 #include <hidl/LegacySupport.h>
36 #include <processgroup/sched_policy.h>
37 #include "SurfaceFlinger.h"
38 #include "SurfaceFlingerFactory.h"
39 #include "SurfaceFlingerProperties.h"
40
41 using namespace android;
42
startGraphicsAllocatorService()43 static status_t startGraphicsAllocatorService() {
44 using android::hardware::configstore::getBool;
45 using android::hardware::configstore::V1_0::ISurfaceFlingerConfigs;
46 if (!android::sysprop::start_graphics_allocator_service(false)) {
47 return OK;
48 }
49
50 status_t result = hardware::registerPassthroughServiceImplementation<
51 android::hardware::graphics::allocator::V3_0::IAllocator>();
52 if (result == OK) {
53 return OK;
54 }
55
56 result = hardware::registerPassthroughServiceImplementation<
57 android::hardware::graphics::allocator::V2_0::IAllocator>();
58 if (result != OK) {
59 ALOGE("could not start graphics allocator service");
60 return result;
61 }
62
63 return OK;
64 }
65
startDisplayService()66 static void startDisplayService() {
67 using android::frameworks::displayservice::V1_0::implementation::DisplayService;
68 using android::frameworks::displayservice::V1_0::IDisplayService;
69
70 sp<IDisplayService> displayservice = new DisplayService();
71 status_t err = displayservice->registerAsService();
72
73 // b/141930622
74 if (err != OK) {
75 ALOGE("Did not register (deprecated) IDisplayService service.");
76 }
77 }
78
main(int,char **)79 int main(int, char**) {
80 signal(SIGPIPE, SIG_IGN);
81
82 hardware::configureRpcThreadpool(1 /* maxThreads */,
83 false /* callerWillJoin */);
84
85 startGraphicsAllocatorService();
86
87 // When SF is launched in its own process, limit the number of
88 // binder threads to 4.
89 ProcessState::self()->setThreadPoolMaxThreadCount(4);
90
91 // Set uclamp.min setting on all threads, maybe an overkill but we want
92 // to cover important threads like RenderEngine.
93 if (SurfaceFlinger::setSchedAttr(true) != NO_ERROR) {
94 ALOGW("Couldn't set uclamp.min: %s\n", strerror(errno));
95 }
96
97 // The binder threadpool we start will inherit sched policy and priority
98 // of (this) creating thread. We want the binder thread pool to have
99 // SCHED_FIFO policy and priority 1 (lowest RT priority)
100 // Once the pool is created we reset this thread's priority back to
101 // original.
102 int newPriority = 0;
103 int origPolicy = sched_getscheduler(0);
104 struct sched_param origSchedParam;
105
106 int errorInPriorityModification = sched_getparam(0, &origSchedParam);
107 if (errorInPriorityModification == 0) {
108 int policy = SCHED_FIFO;
109 newPriority = sched_get_priority_min(policy);
110
111 struct sched_param param;
112 param.sched_priority = newPriority;
113
114 errorInPriorityModification = sched_setscheduler(0, policy, ¶m);
115 }
116
117 // start the thread pool
118 sp<ProcessState> ps(ProcessState::self());
119 ps->startThreadPool();
120
121 // Reset current thread's policy and priority
122 if (errorInPriorityModification == 0) {
123 errorInPriorityModification = sched_setscheduler(0, origPolicy, &origSchedParam);
124 } else {
125 ALOGE("Failed to set SurfaceFlinger binder threadpool priority to SCHED_FIFO");
126 }
127
128 // instantiate surfaceflinger
129 sp<SurfaceFlinger> flinger = surfaceflinger::createSurfaceFlinger();
130
131 // Set the minimum policy of surfaceflinger node to be SCHED_FIFO.
132 // So any thread with policy/priority lower than {SCHED_FIFO, 1}, will run
133 // at least with SCHED_FIFO policy and priority 1.
134 if (errorInPriorityModification == 0) {
135 flinger->setMinSchedulerPolicy(SCHED_FIFO, newPriority);
136 }
137
138 setpriority(PRIO_PROCESS, 0, PRIORITY_URGENT_DISPLAY);
139
140 set_sched_policy(0, SP_FOREGROUND);
141
142 // Put most SurfaceFlinger threads in the system-background cpuset
143 // Keeps us from unnecessarily using big cores
144 // Do this after the binder thread pool init
145 if (cpusets_enabled()) set_cpuset_policy(0, SP_SYSTEM);
146
147 // initialize before clients can connect
148 flinger->init();
149
150 // publish surface flinger
151 sp<IServiceManager> sm(defaultServiceManager());
152 sm->addService(String16(SurfaceFlinger::getServiceName()), flinger, false,
153 IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL | IServiceManager::DUMP_FLAG_PROTO);
154
155 // publish gui::ISurfaceComposer, the new AIDL interface
156 sp<SurfaceComposerAIDL> composerAIDL = new SurfaceComposerAIDL(flinger);
157 sm->addService(String16("SurfaceFlingerAIDL"), composerAIDL, false,
158 IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL | IServiceManager::DUMP_FLAG_PROTO);
159
160 startDisplayService(); // dependency on SF getting registered above
161
162 if (SurfaceFlinger::setSchedFifo(true) != NO_ERROR) {
163 ALOGW("Couldn't set to SCHED_FIFO: %s", strerror(errno));
164 }
165
166 // run surface flinger in this thread
167 flinger->run();
168
169 return 0;
170 }
171
172 // TODO(b/129481165): remove the #pragma below and fix conversion issues
173 #pragma clang diagnostic pop // ignored "-Wconversion"
174