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 <common/FlagManager.h>
33 #include <configstore/Utils.h>
34 #include <displayservice/DisplayService.h>
35 #include <errno.h>
36 #include <hidl/LegacySupport.h>
37 #include <processgroup/sched_policy.h>
38 #include "SurfaceFlinger.h"
39 #include "SurfaceFlingerFactory.h"
40 #include "SurfaceFlingerProperties.h"
41
42 using namespace android;
43
startGraphicsAllocatorService()44 static status_t startGraphicsAllocatorService() {
45 using android::hardware::configstore::getBool;
46 using android::hardware::configstore::V1_0::ISurfaceFlingerConfigs;
47 if (!android::sysprop::start_graphics_allocator_service(false)) {
48 return OK;
49 }
50
51 status_t result = hardware::registerPassthroughServiceImplementation<
52 android::hardware::graphics::allocator::V3_0::IAllocator>();
53 if (result == OK) {
54 return OK;
55 }
56
57 result = hardware::registerPassthroughServiceImplementation<
58 android::hardware::graphics::allocator::V2_0::IAllocator>();
59 if (result != OK) {
60 ALOGE("could not start graphics allocator service");
61 return result;
62 }
63
64 return OK;
65 }
66
startDisplayService()67 static void startDisplayService() {
68 using android::frameworks::displayservice::V1_0::implementation::DisplayService;
69 using android::frameworks::displayservice::V1_0::IDisplayService;
70
71 sp<IDisplayService> displayservice = sp<DisplayService>::make();
72 status_t err = displayservice->registerAsService();
73
74 // b/141930622
75 if (err != OK) {
76 ALOGE("Did not register (deprecated) IDisplayService service.");
77 }
78 }
79
main()80 int main() {
81 signal(SIGPIPE, SIG_IGN);
82
83 hardware::configureRpcThreadpool(1 /* maxThreads */,
84 false /* callerWillJoin */);
85
86 startGraphicsAllocatorService();
87
88 // When SF is launched in its own process, limit the number of
89 // binder threads to 4.
90 ProcessState::self()->setThreadPoolMaxThreadCount(4);
91
92 // Set uclamp.min setting on all threads, maybe an overkill but we want
93 // to cover important threads like RenderEngine.
94 SurfaceFlinger::setSchedAttr(true, __func__);
95
96 // The binder threadpool we start will inherit sched policy and priority
97 // of (this) creating thread. We want the binder thread pool to have
98 // SCHED_FIFO policy and priority 1 (lowest RT priority)
99 // Once the pool is created we reset this thread's priority back to
100 // original.
101 int newPriority = 0;
102 int origPolicy = sched_getscheduler(0);
103 struct sched_param origSchedParam;
104
105 int errorInPriorityModification = sched_getparam(0, &origSchedParam);
106 if (errorInPriorityModification == 0) {
107 int policy = SCHED_FIFO;
108 newPriority = sched_get_priority_min(policy);
109
110 struct sched_param param;
111 param.sched_priority = newPriority;
112
113 errorInPriorityModification = sched_setscheduler(0, policy, ¶m);
114 }
115
116 // start the thread pool
117 sp<ProcessState> ps(ProcessState::self());
118 ps->startThreadPool();
119
120 // Reset current thread's policy and priority
121 if (errorInPriorityModification == 0) {
122 errorInPriorityModification = sched_setscheduler(0, origPolicy, &origSchedParam);
123 } else {
124 ALOGE("Failed to set SurfaceFlinger binder threadpool priority to SCHED_FIFO");
125 }
126
127 // instantiate surfaceflinger
128 sp<SurfaceFlinger> flinger = surfaceflinger::createSurfaceFlinger();
129
130 // Set the minimum policy of surfaceflinger node to be SCHED_FIFO.
131 // So any thread with policy/priority lower than {SCHED_FIFO, 1}, will run
132 // at least with SCHED_FIFO policy and priority 1.
133 if (errorInPriorityModification == 0 &&
134 !FlagManager::getInstance().disable_sched_fifo_sf_binder()) {
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 // initialize before clients can connect
143 flinger->init();
144
145 // publish surface flinger
146 sp<IServiceManager> sm(defaultServiceManager());
147 sm->addService(String16(SurfaceFlinger::getServiceName()), flinger, false,
148 IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL | IServiceManager::DUMP_FLAG_PROTO);
149
150 // publish gui::ISurfaceComposer, the new AIDL interface
151 sp<SurfaceComposerAIDL> composerAIDL = sp<SurfaceComposerAIDL>::make(flinger);
152 if (FlagManager::getInstance().misc1() &&
153 !FlagManager::getInstance().disable_sched_fifo_composer()) {
154 composerAIDL->setMinSchedulerPolicy(SCHED_FIFO, newPriority);
155 }
156 sm->addService(String16("SurfaceFlingerAIDL"), composerAIDL, false,
157 IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL | IServiceManager::DUMP_FLAG_PROTO);
158
159 startDisplayService(); // dependency on SF getting registered above
160
161 SurfaceFlinger::setSchedFifo(true, __func__);
162 flinger->run();
163 }
164
165 // TODO(b/129481165): remove the #pragma below and fix conversion issues
166 #pragma clang diagnostic pop // ignored "-Wconversion"
167