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 status_t 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 if (err != OK) {
74 ALOGE("Could not register IDisplayService service.");
75 }
76
77 return err;
78 }
79
main(int,char **)80 int main(int, char**) {
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 if (SurfaceFlinger::setSchedAttr(true) != NO_ERROR) {
95 ALOGW("Couldn't set uclamp.min: %s\n", strerror(errno));
96 }
97
98 // The binder threadpool we start will inherit sched policy and priority
99 // of (this) creating thread. We want the binder thread pool to have
100 // SCHED_FIFO policy and priority 1 (lowest RT priority)
101 // Once the pool is created we reset this thread's priority back to
102 // original.
103 int newPriority = 0;
104 int origPolicy = sched_getscheduler(0);
105 struct sched_param origSchedParam;
106
107 int errorInPriorityModification = sched_getparam(0, &origSchedParam);
108 if (errorInPriorityModification == 0) {
109 int policy = SCHED_FIFO;
110 newPriority = sched_get_priority_min(policy);
111
112 struct sched_param param;
113 param.sched_priority = newPriority;
114
115 errorInPriorityModification = sched_setscheduler(0, policy, ¶m);
116 }
117
118 // start the thread pool
119 sp<ProcessState> ps(ProcessState::self());
120 ps->startThreadPool();
121
122 // Reset current thread's policy and priority
123 if (errorInPriorityModification == 0) {
124 errorInPriorityModification = sched_setscheduler(0, origPolicy, &origSchedParam);
125 } else {
126 ALOGE("Failed to set SurfaceFlinger binder threadpool priority to SCHED_FIFO");
127 }
128
129 // instantiate surfaceflinger
130 sp<SurfaceFlinger> flinger = surfaceflinger::createSurfaceFlinger();
131
132 // Set the minimum policy of surfaceflinger node to be SCHED_FIFO.
133 // So any thread with policy/priority lower than {SCHED_FIFO, 1}, will run
134 // at least with SCHED_FIFO policy and priority 1.
135 if (errorInPriorityModification == 0) {
136 flinger->setMinSchedulerPolicy(SCHED_FIFO, newPriority);
137 }
138
139 setpriority(PRIO_PROCESS, 0, PRIORITY_URGENT_DISPLAY);
140
141 set_sched_policy(0, SP_FOREGROUND);
142
143 // Put most SurfaceFlinger threads in the system-background cpuset
144 // Keeps us from unnecessarily using big cores
145 // Do this after the binder thread pool init
146 if (cpusets_enabled()) set_cpuset_policy(0, SP_SYSTEM);
147
148 // initialize before clients can connect
149 flinger->init();
150
151 // publish surface flinger
152 sp<IServiceManager> sm(defaultServiceManager());
153 sm->addService(String16(SurfaceFlinger::getServiceName()), flinger, false,
154 IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL | IServiceManager::DUMP_FLAG_PROTO);
155
156 startDisplayService(); // dependency on SF getting registered above
157
158 if (SurfaceFlinger::setSchedFifo(true) != NO_ERROR) {
159 ALOGW("Couldn't set to SCHED_FIFO: %s", strerror(errno));
160 }
161
162 // run surface flinger in this thread
163 flinger->run();
164
165 return 0;
166 }
167
168 // TODO(b/129481165): remove the #pragma below and fix conversion issues
169 #pragma clang diagnostic pop // ignored "-Wconversion"
170