相机定屏问题分析四：【cameraserver 最大request buffer超标】后置视频模式预览定屏闪退至桌面
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上一篇我们讲了：相机定屏问题分析三：【配流ConfigStream失败】外屏打开相机视频照片人像来回切换后，相机页面卡死，点击没反应9055522
这一篇我们开始讲： 相机定屏问题分析四：【cameraserver 最大request buffer超标】后置视频模式预览定屏闪退至桌面9208793
目录
一、背景
二、：原因分析
2.1：首先查看最直接的闪退原因
2.2 ：分析request 246状态
2.3 ：分析request 246未执行完成原因
2.4 ：分析buffer error原因
2.5 ：解决思路
2.6 ：分析request buffer最大值来源
2.7 ：解决方案
一、背景
【操作步骤】【Operation steps】相机—视频模式后置预览。开启水印 照片模式拍 切视频模式录制视频 查看成像 下拉点进WiFi界面连接WiFi 再切回相机照片模式拍照，录制视频
【实际结果】【Actual results】低概率相机定屏闪退至桌面
【期望结果】【Expected results】不会定屏闪退至桌面
二、：原因分析
2.1：首先查看最直接的闪退原因
request 236在flush过程中被终止，且是性能差delay导致：
05-17 16:35:18.767668 30415 30415 I [ 6586.495729]CAM_WARN: CAM-UTIL: cam_common_util_thread_switch_delay_detect: 158 CDM workq schedule delay detected 6586:565033 cur 6586:572244 diff 7: threshold 5
05-17 16:35:19.842762 30421 30421 I [ 6587.570823]CAM_WARN: CAM-UTIL: cam_common_util_thread_switch_delay_detect: 158 CDM workq schedule delay detected 6587:597735 cur 6587:647348 diff 49: threshold 5
05-17 16:35:21.102488 30421 30421 I [ 6588.830549]CAM_WARN: CAM-UTIL: cam_common_util_thread_switch_delay_detect: 158 CDM workq schedule delay detected 6588:897158 cur 6588:907071 diff 9: threshold 505-17 16:35:22.123838 30422 30422 I [ 6589.851899]CAM_WARN: CAM-ICP: cam_icp_mgr_handle_frame_process: 2196 ctx_id 0 req 246 dev 3 has been aborted[flushed]
2.2 ：分析request 246状态
果然RequestId: 246超时未完成进入dump：
05-17 16:35:22.250 22496 8602 E CamX : [ALWAYS_ON ] camxsession.cpp:6475 HandleSystemEventCb() Triggering System Event: Session:0xb400007a6a40d000, Node:Unknown(-1), Instance:-1, Pipeline:Unknown(-1) DumpOnly:1
05-17 16:35:22.250 22496 8602 E CamX : [ALWAYS_ON ] camxsession.cpp:6484 HandleSystemEventCb() ErrorCode:259, ErrorString: CamxResultExtCoreFlushResultTimedOut, ErrorDescription: Description: CamxResultExt Core Flush Result TimedOut forceSigAbort=0 threadCallStacksDumped = 0frameworkFrameNum=259
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8826 DumpDebugInfo() +----------------------------------------------------------+
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8827 DumpDebugInfo() + CALLING SESSION DUMP 0xb400007a6a40d000 +
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8828 DumpDebugInfo() + numPipelines: 1
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8829 DumpDebugInfo() + livePendingRequests: 1
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8830 DumpDebugInfo() + maxLivePendingRequests: 21
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8831 DumpDebugInfo() + requestQueueDepth: 23
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8841 DumpDebugInfo() + Pipeline[0] Flush Status: 1
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8844 DumpDebugInfo() + usecaseNumBatchedFrames: 1
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxsession.cpp:8873 DumpDebugInfo() WARNING: Lock failed with status: 18. but continuing session dump
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6507 DumpDebugInfo() +----------------------------------------------------------+
05-17 16:35:22.250 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6508 DumpDebugInfo() + PIPELINE DEBUG INFO +
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6514 DumpDebugInfo() + Pipeline Name: VideoEIS3PreviewEIS2Offline_0_cam_0, Pipeline ID: 0, 0xb400007aa02ad000, CurrentRequestId: 246 cameraid=0
05-17 16:35:22.251 22496 8602 I CamX : [ INFO][CORE ] camxpipeline.cpp:7408 LogPendingNodes() + Session 0xb400007a6a40d000 - Pipeline VideoEIS3PreviewEIS2Offline_0_cam_0 Pending Nodes
2.3 ：分析request 246未执行完成原因
buffer错误导致246帧未执行完：
05-17 16:35:22.202 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:6909 InjectResult() Session 0xb400007a6a40d000 [VideoEIS3PreviewEIS2Offline] Reporting a buffer error during flush to the framework for streamIndex 1 SeqId: 245 <-> ReqId: 246
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5133 ProcessResultBuffers() Result buffer for sequence ID 245 framenumber 245 in error state
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5140 ProcessResultBuffers() Result buffer: 0xb400007a6d75a0c0, error:1, valid:0, buffer:0xb400007a6a431bd0, pStream:0xb400007ac97ec180
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5149 ProcessResultBuffers() Message: 0xb400007a72a8a0a8, messageType: 1, messageUnion: 0x7ab6de5330, errorMessageCode: 4, frameworkFrameNum: 245, pErrorStream: 0xb400007ac97ec180
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][HAL ] camxhaldevice.cpp:831 Notify() type 00000001, frame_number 337, error_code 00000004【buffer错误】, error_stream 0xb400007a89961228
05-17 16:35:22.202 22496 22545 I CamX : [ INFO][CORE ] camxsession.cpp:7201 AdvanceMinExpectedResult() Session 0xb400007a6a40d000: pHolder 0xb400007a6d75a000 Can't advance because of buffer[1] for sequence Id: 245, Pipeline Index: 0
05-17 16:35:22.202 22496 22545 I CamX : [ INFO][CORE ] camxsession.cpp:7316 AdvanceMinExpectedResult() Session 0xb400007a6a40d000: Results processed, current queue state: minResultIdExpected = 246, maxResultIdExpected= 246, minSequenceIdExpected: 245, maxSequenceIdExpected: 245, and numResultsPending: 1 m_livePendingRequests: 1
05-17 16:35:22.202 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:6909 InjectResult() Session 0xb400007a6a40d000 [VideoEIS3PreviewEIS2Offline] Reporting a buffer error during flush to the framework for streamIndex 1 SeqId: 245 <-> ReqId: 246
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5133 ProcessResultBuffers() Result buffer for sequence ID 245 framenumber 245 in error state
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5140 ProcessResultBuffers() Result buffer: 0xb400007a6d75a0c0, error:1, valid:0, buffer:0xb400007a6a431bd0, pStream:0xb400007ac97ec180
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:5149 ProcessResultBuffers() Message: 0xb400007a72a8a0a8, messageType: 1, messageUnion: 0x7ab6de5330, errorMessageCode: 4, frameworkFrameNum: 245, pErrorStream: 0xb400007ac97ec180
05-17 16:35:22.203 22496 22542 I CamX : [ INFO][HAL ] camxhaldevice.cpp:831 Notify() type 00000001, frame_number 337, error_code 00000004【buffer错误】, error_stream 0xb400007a8996122805-17 16:35:22.202 22496 22542 I CamX : [ INFO][CORE ] camxsession.cpp:6909 InjectResult() Session 0xb400007a6a40d000 [VideoEIS3PreviewEIS2Offline] Reporting a buffer error during flush to the framework for streamIndex 1 SeqId: 245 <-> ReqId: 246
05-17 16:35:22.209 22933 22933 D OCAM_GalleryHelper: startGallery, thumbnail rect : Rect(108, 1989 - 252, 2133) target rect :Rect(0, 246 - 1080, 2166), Bitmap width:540, height:960,thumbnail.getUri():content://************/231,requestGalleryTransitionType: 0, gallery support early start is true
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6514 DumpDebugInfo() + Pipeline Name: VideoEIS3PreviewEIS2Offline_0_cam_0, Pipeline ID: 0, 0xb400007aa02ad000, CurrentRequestId: 246 cameraid=0
05-17 16:35:22.251 22496 8602 I CamX : [ INFO][CORE ] camxpipeline.cpp:7412 LogPendingNodes() | Requests Range - lastInOrderCompletedRequestId: 246 currentRequest : 246
05-17 16:35:22.251 22496 8602 I CamX : [ INFO][CORE ] camxpipeline.cpp:7412 LogPendingNodes() | Requests Range - lastInOrderCompletedRequestId: 246 currentRequest : 246
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6566 DumpDebugInfo() | Requests Range - lastInOrderMetaCompletedRequestId: 246 currentRequest : 246
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxpipeline.cpp:6566 DumpDebugInfo() | Requests Range - lastInOrderMetaCompletedRequestId: 246 currentRequest : 246
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxmetadatapool.cpp:1697 DumpMetadataSlotDebugInfo() Slot Index = 16 IsValid = 1 Associated ReqId = 246 Metabuffer = 0xb400007b0862a460
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxmetadatapool.cpp:1697 DumpMetadataSlotDebugInfo() Slot Index = 16 IsValid = 1 Associated ReqId = 246 Metabuffer = 0xb400007b0862a380
05-17 16:35:22.251 22496 8602 I CamX : [ DUMP][CORE ] camxnode.cpp:7819 DumpDebugInfo() + Request: 246 Unsuccessful. metaComplete: 1, reqComplete: 1, numUnsigFences: 0, numUnprocFences: 0, status: SUCCESS , currTime 16:35:22:250 statusTransitionTime: 16:35:22:169
05-17 16:35:22.297 22933 22933 D OCAM_GalleryHelper: startTransitionAnimation, thumbnail rect : Rect(108, 1989 - 252, 2133) target rect :Rect(0, 246 - 1080, 2166)
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][HAL ] camxsession.cpp:9242 ProcessMetabufferPendingQueue() Pending Queue pipeline VideoEIS3PreviewEIS2Offline_0_cam_0 request 246 old = 246 last 246 delay 0 sequence 245 old 245 new 245
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][HAL ] camxsession.cpp:9242 ProcessMetabufferPendingQueue() Pending Queue pipeline VideoEIS3PreviewEIS2Offline_0_cam_0 request 246 old = 246 last 246 delay 0 sequence 245 old 245 new 245
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][HAL ] camxsession.cpp:9242 ProcessMetabufferPendingQueue() Pending Queue pipeline VideoEIS3PreviewEIS2Offline_0_cam_0 request 246 old = 246 last 246 delay 0 sequence 245 old 245 new 245
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.gme0_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.eisv210_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.eisv311_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.dewarp13_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.dewarp14_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_com.qti.node.swhme4_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [ INFO][CORE ] camxnode.cpp:13427 ClearDependencies() Clearing dependencies for Node: VideoEIS3PreviewEIS2Offline_IPE2_cam0 with lastCompletedRequestId 246 and m_tRequestId 1
05-17 16:35:22.855 22496 8602 I CamX : [CORE_CFG][CORE ] camxpipeline.h:2371 SaveFlushInfo() Pipeline:VideoEIS3PreviewEIS2Offline Saving lastFlushRequestId: 246 flushType: 02.4 ：分析buffer error原因
request too much buffers表示请求buffer数超标了最大值21。
05-17 16:35:19.700 22933 8627 I APS_INTERFACE: [INFO][ ALGO_WATERMARK ] APSWaterMarkNode.cpp: 422 watermarkProcess() watermark process framerId:245, result:0
05-17 16:35:19.734 22933 8627 I watermarkProcess() watermark process framerId:246, result:005-17 16:35:21.295 22495 22533 E Camera3-OutputStream: getBufferLockedCommon: Stream 3: Can't dequeue next output buffer: Function not implemented (-38)
05-17 16:35:21.295 22495 22533 E AidlCamera3-OutputUtils: requestStreamBuffers: Can't get output buffer for stream 3: Function not implemented (-38)
05-17 16:35:21.308 22495 22531 E Camera3-OutputStream: getBufferLockedCommon: Stream 3: Can't dequeue next output buffer: Function not implemented (-38)
05-17 16:35:21.308 22495 22531 E AidlCamera3-OutputUtils: requestStreamBuffers: Can't get output buffer for stream 3: Function not implemented (-38)
05-17 16:35:21.320 22495 22532 E AidlCamera3-OutputUtils: requestStreamBuffers: request too much buffers for stream 3: at HAL: 3 + requesting: 19 > max: 21
2.5 ：解决思路
由于压力测试才出现，性能极差时request buffer最大值无法满足需要，我们将max: 21增加即可解决此问题。
2.6 ：分析request buffer最大值来源
分析思路参考：内存泄漏系列专题分析之十七: Camera HAL3 camera3_stream_t max_buffers和Camera3Stream maxNumBuffers最大buffer数控制FWK原理
2.7 ：解决方案
增加最大值的解决方案参考：
内存泄漏系列专题分析之十八: requestStreamBuffers: request too much buffers for stream 3: 请求内存buffer数超标解决方案
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