1. Toy模板网首页
  2. > Toy博客

高通hypervisor display框架解析

9月前 作者：norlan_jame 分类：Toy博客 阅读(37) 违法举报

这篇具有很好参考价值的文章主要介绍了高通hypervisor display框架解析。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

高通hypervisor display的架构

下面这张图是高通文档上能看到的对于高通hypervisor的display显示框架，但是关于QNX和LA侧是如何交互的，好像没有找到相关的文档介绍。

openwfd,高通hypervisor display,html5,前端,html

正好最近遇到了一些和display相关的问题，趁着这个档口稍微研究了下QNX和LA侧两边是怎么交互的

Hypervisor Display架构部分细节解析

下图是对前面那张图的细节补充

openwfd,高通hypervisor display,html5,前端,html

 1，所有LA侧的APP与显示相关的调用最终都会交由SurfaceFlinger处理

2，SurfaceFlinger会最终调用android.hardware.graphics.composer@2.4-service服务

3，android.hardware.graphics.composer@2.4-service服务会调用GPU&DRM&Qcom的一些列库文件（很遗憾这些库相当一大部分源码是不开源的）

4，libdrm库调用open/ioctl等函数会经过lib_drm_fe库的转接，当然lib_drm_fe会做很多其他适配的工作

5，lib_drm_fe会调用内核HGSL驱动中的hab通信接口与QNX侧的wfd_be服务进行通信

6，wfd_be服务会解析接收到的LA侧的数据包

7，根据数据包中的命令类型调用不同的openwfd接口，需要注意的是，这里的接口是做了一层转换的，举个例子wfdEnumerateDevices_Host，这个接口会进行转换之后真正调用wfdEnumerateDevices函数

8，所有的操作都执行完成之后，如果有必要会唤醒wfd_be的commit&vsync现场，通知openwfd刷新画面

更细节的框图：

openwfd,高通hypervisor display,html5,前端,html

Surfaceflinger backtrace

这个backtrace是刚好有个和display相关的问题复现的时候的backtrace，比较难得的能抓到整个surfaceflinger block住的状态

msmnile_gvmq:/ # debuggerd -b 423
debuggerd -b 423


----- pid 423 at 2023-01-15 19:27:49 -----
Cmd line: /vendor/bin/hw/android.hardware.graphics.composer@2.4-service
ABI: 'arm64'

"composer@2.4-se" sysTid=423
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000097bbc  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::getAndExecuteCommand()+172) (BuildId: d9c65f1690822c418040f1143712be80)
    #03 pc 000000000009918c  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::joinThreadPool(bool)+96) (BuildId: d9c65f1690822c418040f1143712be80)
    #04 pc 000000000000a1c4  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (main+380) (BuildId: 7e1ed405d730e4909758105094182804)
    #05 pc 00000000000499fc  /apex/com.android.runtime/lib64/bionic/libc.so (__libc_init+108) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"Binder:423_1" sysTid=476
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000047a0c  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+296) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #03 pc 0000000000047bfc  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #04 pc 00000000000484b8  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+60) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #05 pc 000000000006ff80  /apex/com.android.vndk.v30/lib64/libbinder.so (android::PoolThread::threadLoop()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #06 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #07 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #08 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #09 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"Binder:423_2" sysTid=477
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000047a0c  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+296) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #03 pc 0000000000047bfc  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #04 pc 00000000000484b8  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+60) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #05 pc 000000000006ff80  /apex/com.android.vndk.v30/lib64/libbinder.so (android::PoolThread::threadLoop()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #06 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #07 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #08 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #09 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"HWC_UeventThrea" sysTid=530
    #00 pc 000000000009c1b4  /apex/com.android.runtime/lib64/bionic/libc.so (__ppoll+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 000000000005a3c0  /apex/com.android.runtime/lib64/bionic/libc.so (poll+92) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000004a98  /apex/com.android.vndk.v30/lib64/libhardware_legacy.so (uevent_next_event+84) (BuildId: 0ce074f6b680597fc37aded2a96805a4)
    #03 pc 0000000000027b98  /vendor/lib64/hw/hwcomposer.msmnile.so (sdm::HWCUEvent::UEventThread(sdm::HWCUEvent*)+212) (BuildId: 6ca7495298a58781238d1b65a06601a9)
    #04 pc 00000000000340b0  /vendor/lib64/hw/hwcomposer.msmnile.so (void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (*)(sdm::HWCUEvent*), sdm::HWCUEvent*> >(void*)+40) (BuildId: 6ca7495298a58781238d1b65a06601a9)
    #05 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #06 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"DRMFE_EventList" sysTid=543
    #00 pc 000000000009b0f8  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+8) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000002698  /vendor/lib64/libuhab.so (habmm_socket_recv+104) (BuildId: e82477cd90bbe46d4a48faaf5486a0e4)
    #03 pc 000000000001e8c4  /vendor/lib64/lib_drm_fe.so (user_os_utils_recv+216) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #04 pc 00000000000196e8  /vendor/lib64/lib_drm_fe.so (event_listener+312) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #05 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #06 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"SDM_EventThread" sysTid=550
    #00 pc 000000000009c1b4  /apex/com.android.runtime/lib64/bionic/libc.so (__ppoll+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 000000000005a3c0  /apex/com.android.runtime/lib64/bionic/libc.so (poll+92) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 000000000007a534  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventHandler()+216) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #03 pc 00000000000798cc  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventThread(void*)+12) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #04 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #05 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"HwBinder:423_1" sysTid=561
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000097bbc  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::getAndExecuteCommand()+172) (BuildId: d9c65f1690822c418040f1143712be80)
    #03 pc 000000000009918c  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::joinThreadPool(bool)+96) (BuildId: d9c65f1690822c418040f1143712be80)
    #04 pc 00000000000a83b0  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::PoolThread::threadLoop()+24) (BuildId: d9c65f1690822c418040f1143712be80)
    #05 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #06 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #07 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #08 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"HwBinder:423_2" sysTid=562
    #00 pc 000000000009c1b4  /apex/com.android.runtime/lib64/bionic/libc.so (__ppoll+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 000000000005a3c0  /apex/com.android.runtime/lib64/bionic/libc.so (poll+92) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 000000000001896c  /vendor/lib64/lib_drm_fe.so (drm_sync_wait_fe+68) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #03 pc 0000000000013648  /vendor/lib64/lib_drm_fe.so (drm_crtc_wait_for_fence_fe+360) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #04 pc 0000000000014280  /vendor/lib64/lib_drm_fe.so (drm_atomic_prepare_commit_fe+220) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #05 pc 0000000000014c10  /vendor/lib64/lib_drm_fe.so (drm_atomic_complete_commit_fe+236) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #06 pc 00000000000158d4  /vendor/lib64/lib_drm_fe.so (drm_mode_atomic_commit_fe+912) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #07 pc 000000000000f0a0  /vendor/lib64/lib_drm_fe.so (drmioctl_fe+864) (BuildId: ad7158dd9eba42d5bc2e156cebb4bf0a)
    #08 pc 0000000000007298  /vendor/lib64/libdrm.so (drmIoctl+104) (BuildId: 9db896bc552bb813f81c52df388f1f55)
    #09 pc 0000000000011230  /vendor/lib64/libdrm.so (drmModeAtomicCommit+816) (BuildId: 9db896bc552bb813f81c52df388f1f55)
    #10 pc 000000000002b020  /vendor/lib64/libsdedrm.so (sde_drm::DRMAtomicReq::Commit(bool, bool)+156) (BuildId: 259c96354001f6853b4a7359dc6b1b62)
    #11 pc 00000000000703e0  /vendor/lib64/libsdmcore.so (sdm::HWDeviceDRM::AtomicCommit(sdm::HWLayers*)+140) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #12 pc 000000000006ffe8  /vendor/lib64/libsdmcore.so (sdm::HWDeviceDRM::Commit(sdm::HWLayers*)+120) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #13 pc 0000000000074bbc  /vendor/lib64/libsdmcore.so (sdm::HWPeripheralDRM::Commit(sdm::HWLayers*)+436) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #14 pc 0000000000035b80  /vendor/lib64/libsdmcore.so (sdm::DisplayBase::Commit(sdm::LayerStack*)+364) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #15 pc 0000000000040e14  /vendor/lib64/libsdmcore.so (sdm::DisplayBuiltIn::Commit(sdm::LayerStack*)+340) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #16 pc 000000000004253c  /vendor/lib64/hw/hwcomposer.msmnile.so (sdm::HWCDisplay::CommitLayerStack()+396) (BuildId: 6ca7495298a58781238d1b65a06601a9)
    #17 pc 0000000000049e58  /vendor/lib64/hw/hwcomposer.msmnile.so (sdm::HWCDisplayBuiltIn::Present(int*)+496) (BuildId: 6ca7495298a58781238d1b65a06601a9)
    #18 pc 000000000002a9f0  /vendor/lib64/hw/hwcomposer.msmnile.so (sdm::HWCSession::PresentDisplay(hwc2_device*, unsigned long, int*)+544) (BuildId: 6ca7495298a58781238d1b65a06601a9)
    #19 pc 000000000000b8f0  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_1::passthrough::detail::HwcHalImpl<android::hardware::graphics::composer::V2_4::hal::ComposerHal>::presentDisplay(unsigned long, int*, std::__1::vector<unsigned long, std::__1::allocator<unsigned long> >*, std::__1::vector<int, std::__1::allocator<int> >*)+68) (BuildId: 7e1ed405d730e4909758105094182804)
    #20 pc 00000000000173f8  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executePresentDisplay(unsigned short)+104) (BuildId: 7e1ed405d730e4909758105094182804)
    #21 pc 0000000000016484  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::executeCommand(android::hardware::graphics::composer::V2_1::IComposerClient::Command, unsigned short)+236) (BuildId: 7e1ed405d730e4909758105094182804)
    #22 pc 0000000000014e54  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_1::hal::ComposerCommandEngine::execute(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, bool*, unsigned int*, android::hardware::hidl_vec<android::hardware::hidl_handle>*)+136) (BuildId: 7e1ed405d730e4909758105094182804)
    #23 pc 0000000000012a18  /vendor/bin/hw/android.hardware.graphics.composer@2.4-service (android::hardware::graphics::composer::V2_1::hal::detail::ComposerClientImpl<android::hardware::graphics::composer::V2_1::IComposerClient, android::hardware::graphics::composer::V2_1::hal::ComposerHal>::executeCommands(unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&, std::__1::function<void (android::hardware::graphics::composer::V2_1::Error, bool, unsigned int, android::hardware::hidl_vec<android::hardware::hidl_handle> const&)>)+108) (BuildId: 7e1ed405d730e4909758105094182804)
    #24 pc 000000000002803c  /apex/com.android.vndk.v30/lib64/android.hardware.graphics.composer@2.2.so (android::hardware::graphics::composer::V2_2::BnHwComposerClient::_hidl_executeCommands_2_2(android::hidl::base::V1_0::BnHwBase*, android::hardware::Parcel const&, android::hardware::Parcel*, std::__1::function<void (android::hardware::Parcel&)>)+528) (BuildId: 1ed6665f715cc1e48077f38fd2225c9c)
    #25 pc 0000000000041e30  /apex/com.android.vndk.v30/lib64/android.hardware.graphics.composer@2.4.so (android::hardware::graphics::composer::V2_4::BnHwComposerClient::onTransact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+600) (BuildId: d21eaf84de0eeb98a1488c8f69b0d718)
    #26 pc 0000000000093fac  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::BHwBinder::transact(unsigned int, android::hardware::Parcel const&, android::hardware::Parcel*, unsigned int, std::__1::function<void (android::hardware::Parcel&)>)+68) (BuildId: d9c65f1690822c418040f1143712be80)
    #27 pc 0000000000097f44  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::getAndExecuteCommand()+1076) (BuildId: d9c65f1690822c418040f1143712be80)
    #28 pc 000000000009918c  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::joinThreadPool(bool)+96) (BuildId: d9c65f1690822c418040f1143712be80)
    #29 pc 00000000000a83b0  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::PoolThread::threadLoop()+24) (BuildId: d9c65f1690822c418040f1143712be80)
    #30 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #31 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #32 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #33 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"SDM_EventThread" sysTid=598
    #00 pc 000000000009c1b4  /apex/com.android.runtime/lib64/bionic/libc.so (__ppoll+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 000000000005a3c0  /apex/com.android.runtime/lib64/bionic/libc.so (poll+92) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 000000000007a534  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventHandler()+216) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #03 pc 00000000000798cc  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventThread(void*)+12) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #04 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #05 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"SDM_EventThread" sysTid=600
    #00 pc 000000000009c1b4  /apex/com.android.runtime/lib64/bionic/libc.so (__ppoll+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 000000000005a3c0  /apex/com.android.runtime/lib64/bionic/libc.so (poll+92) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 000000000007a534  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventHandler()+216) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #03 pc 00000000000798cc  /vendor/lib64/libsdmcore.so (sdm::HWEventsDRM::DisplayEventThread(void*)+12) (BuildId: c80e3f1cd75b3f23581f923f1170aeea)
    #04 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #05 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"Binder:423_3" sysTid=10830
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000047a0c  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::talkWithDriver(bool)+296) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #03 pc 0000000000047bfc  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::getAndExecuteCommand()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #04 pc 00000000000484b8  /apex/com.android.vndk.v30/lib64/libbinder.so (android::IPCThreadState::joinThreadPool(bool)+60) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #05 pc 000000000006ff80  /apex/com.android.vndk.v30/lib64/libbinder.so (android::PoolThread::threadLoop()+24) (BuildId: 4e678e29aecf2b6af558fbad12d0a468)
    #06 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #07 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #08 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #09 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

"HwBinder:423_3" sysTid=10831
    #00 pc 000000000009b0f4  /apex/com.android.runtime/lib64/bionic/libc.so (__ioctl+4) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #01 pc 0000000000057de0  /apex/com.android.runtime/lib64/bionic/libc.so (ioctl+156) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #02 pc 0000000000097bbc  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::getAndExecuteCommand()+172) (BuildId: d9c65f1690822c418040f1143712be80)
    #03 pc 000000000009918c  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::IPCThreadState::joinThreadPool(bool)+96) (BuildId: d9c65f1690822c418040f1143712be80)
    #04 pc 00000000000a83b0  /apex/com.android.vndk.v30/lib64/libhidlbase.so (android::hardware::PoolThread::threadLoop()+24) (BuildId: d9c65f1690822c418040f1143712be80)
    #05 pc 00000000000154d0  /apex/com.android.vndk.v30/lib64/libutils.so (android::Thread::_threadLoop(void*)+260) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #06 pc 0000000000014d94  /apex/com.android.vndk.v30/lib64/libutils.so (thread_data_t::trampoline(thread_data_t const*)+412) (BuildId: 302a93d93d50a20e71c051933fe98b5f)
    #07 pc 00000000000afecc  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)
    #08 pc 0000000000050408  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: 8d0a10271eef02de6c33b788fec2db37)

----- end 423 -----

相关概念补充

有关commit:

在OpenWFD或者其他图形系统中，"commit"的概念通常指的是将一系列的更改或更新应用到图形系统，使得这些更改在屏幕上可见。

在你对系统做了一系列的更改后，例如更改了图形对象的属性，或者更改了绘制命令，这些更改在内存中进行，但并不会立即反映到屏幕上。这是因为立即更新屏幕会导致屏幕频繁刷新，这会消耗大量的系统资源，并且可能导致屏幕闪烁。因此，你可以在内存中做所有的更改，然后在完成所有更改后，通过调用"commit"操作，将这些更改一次性应用到屏幕上。

在OpenWFD中，有一个API函数叫做"wfdDeviceCommit"，它的功能就是执行这个"commit"操作。当你调用这个函数时，所有之前对设备做的更改（例如设置设备属性或者更改端口模式）都会被应用，这些更改将会在下一次屏幕刷新时可见。

这种"commit"机制在许多图形系统中都很常见，包括OpenWFD和Wayland等，它们都使用这种机制来优化屏幕更新和减少资源使用。

有关vsync:

"VSync"是"垂直同步"的缩写，这是一种在计算机图形中常见的技术，用于解决屏幕撕裂（screen tearing）问题。屏幕撕裂是当计算机的图形处理器（GPU）输出的帧率超过显示器的刷新率时，一帧的上半部分和下半部分不同步，导致画面看起来像是被撕裂了一样。

垂直同步技术通过同步GPU的帧输出速度和显示器的刷新率来避免屏幕撕裂。具体来说，当启用VSync时，GPU会等到显示器完成一次完整的垂直刷新（从上到下更新所有像素）后，才开始渲染下一帧。这样可以确保在显示器每次刷新时，只有一帧数据被发送到显示器，避免了屏幕撕裂。

然而，垂直同步也有一些缺点。由于GPU需要等待显示器完成刷新，如果GPU的渲染速度非常快，这可能会导致GPU的性能没有得到充分利用。此外，如果GPU的帧率低于显示器的刷新率，用户可能会感觉到画面卡顿。因此，垂直同步是否启用，以及如何配置垂直同步，往往取决于具体的应用需求和硬件性能。

在OpenWFD中，可能有相关的API或设置用于控制垂直同步，但具体的实现和使用可能会根据不同的OpenWFD实现和硬件配置有所不同。文章来源地址https://www.toymoban.com/news/detail-644011.html

到了这里，关于高通hypervisor display框架解析的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处： 如若内容造成侵权/违法违规/事实不符，请点击违法举报进行投诉反馈，一经查实，立即删除！

分享到：
领支付宝红包 赞助服务器费用

相关文章

  • html5前端学习

    html5前端学习

    定义HTML文档，浏览器看到后就明白这个是HTML文档，所以其他元素要包裹在它里面，标签限定了文档的开始点和结束点。 head标签用于定义文档的头部，描述了文档的各种属性和信息，包括文档的标题、在Web的位置以及和其他文档的关系等，绝大多数文档头部包含的数据都不会

    2024年02月08日
    浏览(53)
  • 前端学习——HTML5

    前端学习——HTML5

    新增布局标签 新增状态标签 新增列表标签 新增文本标签 新增表单控件属性 input新增type属性值 新增视频标签 新增音频标签

    2024年02月12日
    浏览(58)
  • html5——前端笔记

    html5——前端笔记

    html页面： !DOCTYPE 不是一个 HTML 标签，它就是 文档类型声明标签，这句代码的意思是: 当前页面采取的是 HTML5 版本来显示网页 声明位于文档中的最前面的位置，处于 标签之前。 不是一个 HTML 标签，它就是 文档类型声明标签。 lang 语言种类,用来定义当前文档显示的语言。

    2024年02月10日
    浏览(41)
  • html5前端学习2

    html5前端学习2

    一篇思维题题解： 第五周任务 [Cloned] - Virtual Judge (vjudge.net) K - Summer Vacation-CSDN博客  快捷键： Ctrl+Alt+Down        向下选取 Ctrl+Alt+Up             向上选取（会出现多个光标，可以同时输入） Ctrl+Enter                无论光标在哪个位置，都向下换行，与Enter有区别 链接分

    2024年02月10日
    浏览(100)

  • HTML5前端标签练习

    标签的分类 标签的嵌套 a标签 验证form表单朝后端提交数据 效果 代码

    2024年02月08日
    浏览(57)
  • 2023前端面试笔记 —— HTML5

    2023前端面试笔记 —— HTML5

    内容 链接 2023前端面试笔记 HTML5 HTML5作为最新的HTML标准，为前端开发带来了许多新的特性和功能。在前端面试中，HTML5的知识和应用已经成为了必备的技能。本篇文章将总结HTML5的 重要知识点和常见面试题 ，帮助读者更好地准备前端面试，提升自己的竞争力。 HTML 超文本标记

    2024年02月11日
    浏览(56)
  • HTML5的介绍和基本框架

    HTML5的介绍和基本框架

    目录 HTML5 HTML5介绍 HTML5的DOCTYPE声明 HTML5基本骨架 html标签 head标签 body标签 title标签 meta标签 在vscode中写出第一个小框架 HTML5是用来描述网页的一种语言，被称为超文本标记语言。用HTML5编写的文件，后缀以 .html 结尾 HTML是一种标记语言，标记语言是一套标记标签。标签是由尖

    2024年02月12日
    浏览(33)
  • 前端-01Html5基本知识

    前端-01Html5基本知识

    内容 使用浏览器打开 浏览器 谷歌浏览器 清缓存 ctrl+shift+delete vscode 生成浏览器文件.html的快捷方式 !+回车 常用快捷键 快速打开浏览器 插件open in browser 安装，就会多出两个选项来 概念 是一种用来描述网页的一种语言，被称为超文本标记语言，本质是标记语言，标记语言是

    2024年02月04日
    浏览(44)
  • 02-前端基础第二天-HTML5

    02-前端基础第二天-HTML5

    能够书写表格 能够写出无序列表 能够写出3~4个常用input表单类型 能够写出下拉列表表单 能够使用表单元素实现注册页面 能够独立查阅W3C文档 表格标签 列表标签 表单标签 综合案例 查阅文档 表格是实际开发中非常常用的标签： 表格的主要作用 表格的基本语法 1.1表格的主要

    2024年02月12日
    浏览(38)
  • 前端 | （ 十）HTML5简介及相关新增属性 | 尚硅谷前端html+css零基础教程2023最新

    前端 | （ 十）HTML5简介及相关新增属性 | 尚硅谷前端html+css零基础教程2023最新

    学习来源 ：尚硅谷前端html+css零基础教程，2023最新前端开发html5+css3视频 系列笔记 ： 【HTML4】（一）前端简介 【HTML4】（二）各种各样的常用标签 【HTML4】（三）表单及HTML4收尾 【CSS2】（四）CSS基础及CSS选择器 【CSS2】（五）CSS三大特性及常用属性 【CSS2】（六）CSS盒子模型

    2024年02月16日
    浏览(58)

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

博客赞助

微信扫一扫打赏

请作者喝杯咖啡吧~博客赞助

支付宝扫一扫领取红包，优惠每天领

二维码1

领取红包

二维码2

领红包