Tier 2 replays the split-arm registrations - ~100 scenarios, the set Espryt's disaggregation work
has carried since P5 - and it measured green on Magma across all three transports. That is a real
result but it is NOT exit gate 1. The gate says the INTEGRATION BINARY is green under Magma split,
and the set that names is the one the monolith DirectVulkan. arm runs: the whole suite minus
MGL_ITEST_MONOLITH_MECHANISM_FILTER. 510 cases against tier 2's 102, and the readback matrices,
the same-texture copy shapes and the odd-offset uniform ranges are in it and nowhere else in the
disaggregated registry.
integration-magma-full-{split,spawn,tcp}, in no gating step, private log per entry through a list
of its own. THE RESULT: 453/0/57 on inproc, 453/0/57 on spawn, 454/1/57 on tcp - and not one of
the 1530 entries reaches any of the tree's fifteen @P7 named refusals. The single red is
IterationRPProgram203Scenario.FixedCompleteInputProducesFixedCompleteGoldenOutput on the TCP arm:
one texel of 262656, texel 0, which is the case's own exposure value
(IterationRPProgram203Scenario.cpp:371, actual half bits (0x357a, 0x4b65) against golden
(0x3a74, 0x4821)). Deterministic 5/5 on tcp; 5/5 GREEN on inproc, on spawn and on the monolith
control. spawn and tcp differ only in MOBILEGL_IPC_DATA, so the suspicion is the STREAM data path
and not "two processes"; the GLES tcp lane is green in the same run, so it is not the fixture.
Not fixed here - it is what the census is for.
TWO ENVIRONMENT DIFFERENCES FROM THE GATED TIERS, both measured rather than assumed:
* NO MGITEST_SPLIT_LANE=1. That marker arms ScenarioFixture's destructor assertion - a case in
an armed split lane must have moved the client encoder's record ordinal - which is right for
a curated lane and wrong for a whole-binary census. With it set, the first run produced 13
reds, all `EmitSeq was 20 at SetUp and is 20 now`: AdvertisedLimitsScenario (8),
SpirvShaderBinaryScenario (4) and ProgramPipelineScenario.AReservedName - a limits query is
answered from the client's CapsMirror and a shader-binary error surface never reaches a verb.
Those 13 would red on a DirectGLES census too. What it gives up is stated in the comment: this
tier does not prove its records crossed, and the tcp topology proof is inert in it.
* DualBlockScenario.* filtered out. Its green REQUIRES MOBILEGL_IPC_ROLE_SPLIT_STATE=1 and a
census must not set that knob; without it the case is red by name, which is its documented
negative-control behaviour. The monolith arm skips it for the same class of reason.
CtWireScenario gets MOBILEGL_TEST_SERVER_COUNTERS=1 in this tier - a switch that makes a counter
readable, not an oracle that asserts - because without it the spawn arm's ApplierReset case reds
on "server control-record telemetry missing", which says nothing about Magma. The strict-arming,
pmap and persistent-map-arm markers stay out.
The inproc-only exclusion in spawn_lane_parity.py is now PER TIER: in the gated tier the two
scenarios are registered on the inproc arm alone, in the census they are on every arm and simply
skip, so excluding them there would manufacture a spurious "extra".
Measured after the change: every pre-existing lane unchanged and green (magma-split 73,
spawn 52, tcp 54, all-* 102/102/104, GLES 186/102/104, buffers 19, runahead 14, caches 7), the
dual-block census 257 green / 2 skipped / 0 red with an empty ratchet, both new CI steps green,
parity RC=0 across all three tiers, G14 4155 -> 6095 with removed=0.
The note now carries the grouped red list, the 57 named skips by reason, the four pieces of
evidence that the tcp red is a defect and not plumbing, and six findings - the first being that
wave 2's clusters cannot be scheduled from this lane's red list, because on lavapipe there is
essentially none.
MGPipe:MobileGL 前后端拆分
状态:P0–P5e 已收官(P5e 2026-09-19 收官,附一条具名未决:E1 对照需按 ID-114 重新定义),当前在 P5f(一切状态上 wire,计划
P5F-WIRE-COMPLETENESS.md;P6 阻塞于它),P6 计划P6-SPAWN-PLAN.md、契约草稿P6-CONTRACT-DRAFT.md,均尚未开工)。P5e:run-ahead 已武装(十二包落地,strict 车道硬绿 179/179、integration-gpu1357/1357、pull/push/split 三个构建 flavour 全绿;设备上渲染距离 32 下inproc已与monolith齐平,相对它取代的 lockstep p50 +69%。报告P5E-RUNAHEAD.md)(P5c 2026-09-17b88e8487;P5d 三轮 2026-09-18,代码头1f8de61b——inproc性能专项,VD12 Minecraft 上 split 从 7-13 fps 拉到 103-106 fps、client 线程 CPU/帧从 15 ms 到 9.2 ms,报告P5D-INPROC-PERFORMANCE.md)。目标负载(四条 Minecraft A/B trace)已在 Redmi Adreno 830 上以inproc(独立 apply 线程)双后端渲染,barrier tax 首次实测;P5c 把审计出的 59 处不经 wire 的直接内存访问全部归零(契约MobileGL/MG_Remote/CONTRACT-P5C.md),inproc成为只经 wire 交换的诚实两角色。P6 只是传输替换——但这句话的证据是 P5c 时代的,P6 的第一个包是重新证明它的只读审计。当前头、逐门数字与开放项见CURRENT_STAGE_PROGRESS.md。性能纪律(2026-09-08 起):逐线程 CPU 与 tracker 绝对 ns 对着 pull 臂基线记录,不作阻塞门;专门的优化阶段排在路线图推完之后。
是什么
MGPipe 是 MobileGL 前端(MG_State + MG_Impl)与后端(MG_Backend:Espryt = DirectGLES、Magma = DirectVulkan)之间的一份显式接口:gallium 形状、句柄寻址、只推不拉。它取代后端每 draw 直接读 MG_State::pGLContext 的做法,让后端拥有自己的状态机,并在此之上把前后端拆到两个线程(inproc,已达成)与两个进程(spawn,P6)。
接口本身是可独立交付的产物:即使 IPC 永不上线,inproc 就是 monolith 的渲染线程。
架构(一段)
应用 GL 调用
→ MG_Impl(GL 语义、错误、shadow)
→ MG_Impl/Pipe/Tracker:在每条 verb 之前 validate,把变化推成 MGPipe 调用
→ MGPipeScreen / MGPipeContext(两张函数指针表,79 条调用,单一真相源 PipeCalls.def)
monolith:直调 backend 函数 split:发射器写 SEG_CMD ring → server applier(apply 线程)
→ server 对象表(按 {slot, gen} 句柄索引的数组)+ PipeInputs(后端被推送的状态块)
→ MG_Backend(Espryt / Magma),两个后端的 ring / pool / memo / lowering pass 原样不动
← MGPipeCallbacks(10 个具名反向回调 + 1 个正向终止符)
三种形态共用同一份 backend 实现:monolith(默认,进程内直调)、inproc(同进程两个线程,CI 形态与渲染线程交付物;P5 起 lockstep verb barrier,P5b 起 71 个后端槽里 54 个发射、15 个具名拒绝)、spawn(P6:fork+execve 出 server 进程,SPSC 共享内存 ring + FlatBuffers 控制面)。
构建与运行
四个 flavour:build-linux(pull,默认)、build-push(-DMOBILEGL_PIPE_PUSH=ON)、build-verify(+MOBILEGL_PIPE_VERIFY 影子比对,MOBILEGL_ITEST_REQUIRE_GPU=1)、build-split(+MOBILEGL_BUILD_DISAGGREGATED +MOBILEGL_BUILD_DISAGGREGATED_INPROC)。split 运行时必须显式设置传输:
MOBILEGL_TRANSPORT=inproc MOBILEGL_ITEST_REQUIRE_GPU=1 ctest --test-dir build-split -L integration-split --output-on-failure
MOBILEGL_TRANSPORT=inproc ctest --test-dir build-split -L integration-gpu --output-on-failure # 普查车道,只记录
integration-split(DirectGLES.Split.* / DirectVulkan.Split.*)是硬门;integration-gpu 在 inproc 下是带已知 abort / wrong-answer 的普查车道。每条 split entry 带独立 MOBILEGL_LOG_FILE_PATH,阴性控制(scripts/ci/split_negative_controls.sh)只读被选 entry 的私有日志。常用旋钮(全表见 ARCHITECTURE.md 附 A):
| 变量 | 默认 | 用途 |
|---|---|---|
MOBILEGL_IPC_STAGE_MB |
32 |
SEG_STAGE 容量(一条记录一个整 blob);内容分块预算 = 本值的 1/4(MGPipeStageChunkBytes(),默认 8 MiB),超预算的 buffer 范围 / 纹理级切成多条记录,故历史 profile 的显式 256 不再是这两条路径的必需 |
MOBILEGL_IPC_VERB_BARRIER |
1 |
每个 verb 等 appliedSeq == emitSeq;0 只作 E1 阴性控制 |
MOBILEGL_IPC_AUDIT |
0 |
apply 返回后以 0xDD 填退休 staging,查跨返回持针 |
MOBILEGL_IPC_STRICT_ERRORS |
0 |
BARRIER-PULLED residual input 提升为具名 Fatal |
MOBILEGL_IPC_ADOPT_TIER |
2 |
split 使用 emulated persistent-map 路径;auto/0/1/2 |
MOBILEGL_IPC_PERSISTENT_BLOCK_KB |
64 |
persistent-map 块推送粒度;0 是 E3(a) 阴性控制 |
Android 三份 APK flavour:pull、push、split(Gradle 属性 mobilegl.pipePush、mobilegl.buildDisaggregated、mobilegl.buildDisaggregatedInproc;~/w7/notes/tools/wsl_build_p5_apks.sh)。split APK 需运行环境 MOBILEGL_TRANSPORT=inproc,不设置时是 split build 的 monolith control arm(splitctl)。设备 A/B 只用 Redmi 2f7cbe2e,定频协议见 devices/pin-verification-2026-09-07.md。
文件地图
| 文件 | 内容 |
|---|---|
CURRENT_STAGE_PROGRESS.md |
当前头实测、P5b 落地内容、开放项、下一步、证据位置、仍在生效的裁定;随每次落地更新 |
ARCHITECTURE.md |
已定稿的设计:句柄与世代、调用目录与生成器、记录约定、tracker、纹理路径、shader 制品、反向通道、后端改造、传输、persistent map 分档、进程 / EGL / 平台、构建与门、P5 / P5b 落地形状、开关表 |
ROADMAP.md |
纪律、两条跑道、P0…P13 阶段表、里程碑、债务表、开放问题 |
P5F-WIRE-COMPLETENESS.md |
P5f 计划:gPipeInputs 是什么、拆进程后它怎样;阻碍跨进程的完整清单(BARRIER_PULLED 15 字段、Magma、EGL 控制面、静态量、豁免 scope、反向通道);双块演练机制与出口门 |
P6-SPAWN-PLAN.md |
P6 的包计划:树上已有什么(传输原语基本已就绪且有测试)、真正要造什么、P6 与 P12 的边界、七个包与依赖序、出口门与阴性对照 |
P6-CONTRACT-DRAFT.md |
P6 契约草稿(规则 G、令牌、控制面帧、死亡与 run-ahead、阶段修正);c6 落地时移为 MobileGL/MG_Remote/CONTRACT-P6.md |
MEASUREMENTS.md |
逐阶段实测:P0 spike 与基线、P1 verify、P2 门与 DriverBench、P3a / P4a 门与设备 A/B、P5 全门 / E1–E6 / Redmi 四臂、P5b 主机门 / 普查 / 审查 / Redmi 出口 |
devices/pin-verification-2026-09-07.md |
设备定频档案与核验(Redmi 当前口径;小米 / Oppo 历史核验) |
代码地图:
| 路径 | 作用 |
|---|---|
MobileGL/MG_Pipe/ |
PipeCalls.def(目录)、PipeFields.def、Coverage.def、FieldOwnership.def、FillPoints.def、DirtySurface.def;MGPipeTypes.h(payload POD)、MGPipeValueTypes.h、MGPipeHandles.h、MGPipeHostSpan.h、MGPipeCallbacks.h、MGPipeRenderStateSpans、PipeApply、PipeRoute;generated/*.inc(G1–G8 产物,提交进树) |
MobileGL/MG_Impl/Pipe/ |
Tracker.h、PipeFill、SlotAllocator、CsoCache、CompositeResolver、ResourceTracker、SetHashSuppressor、各族 *Emit.h |
MobileGL/MG_Backend/MGPipe/ |
PipeInputs.{h,cpp}(后端被推送的状态块,G5 / G8 产物的 include 点) |
MobileGL/MG_Remote/ |
仅 MOBILEGL_BUILD_DISAGGREGATED=ON:Protocol/(protocol.fbs)、Transport/(Ring、Doorbell、ShmSegment、FdPassing、Framing、InProcessTransport、ReplySlot、EventRing)、Wire/PipeWireCodec(记录编解码、WireVerbSink)、Client/(BackendObject_Remote、ClientSession、EmitTables、CapsMirror、PersistentMapTracker)、Server/(PipeApplier + ServerVerbSink、ServerLoop、ServerSession、StagedShadow);CONTRACT-P5.md、CONTRACT-P5B.md |
scripts/ |
gen_pipe.py(G1–G7)、gen_pipe_field_ownership.py(G8)、gen_pipe_dirty_surface.py、gen_protocol.py、symbol_report.py(G1)、check_include_closure.py、check_doc_citations.py(本目录 file:line lint)、p3a_/p4a_untouched_regions.sh(G5)、三个阴性对照脚本、ci/(split 阴性控制、普查 JUnit、smoke) |
MobileGL/MG_Util/Metrics/PipeStats.{h,cpp} |
边界计数器,MOBILEGL_PIPE_STATS=1 开启 |
MobileGL/Config.h、MobileGL/ConfigLoader.cpp |
MOBILEGL_PIPE_*、MOBILEGL_TRANSPORT、MOBILEGL_IPC_* |
MobileGL/MG_Test/Pipe/、MG_Test/Wire/、MG_IntegrationTest/Harness/Pipe*Peek |
目录 / tracker / emitter 单元、wire 层与 remote client/server 单元、白盒断言 |
tools/spikes/、android-plugin/app/src/trace/cpp/spawn_spike.cpp |
spike A(Android exec 第二个原生可执行文件)、spike B(跨进程外部内存分档) |
术语
- client / server:前端进程 / 后端进程;monolith 下是同一进程的两个角色,inproc 下是两个线程。
- verb:会让 server 做事的命令(draw、dispatch、clear、blit、readback、XFB 跨度、query、纹理操作)。推送只发生在 verb 之前的 validate 时刻。
- class A / B / C:后端槽的三类——A 从 caps mirror 本地回答,B 发射记录,C 具名拒绝(
Fatal{UnmigratedVerb}),永不回落到 monolith applier。 - CSO:常量状态对象(render state、vertex elements、sampler、sampler view、shader),client 侧内容寻址,server 侧按句柄缓存。
- Track V / Track H:值类读点的迁移(整块 POD 过线)/ 对象类读点的迁移(
SharedPtr<前端对象>→ 句柄)。 MGGen:server 私有的"我重铸了驱动对象"纪元,永不过线;与句柄里的 client 世代严格分开。- G1 / G2 / G5 / G14:pull 符号恒等 / pull==push 测试名 / 保护区字节一致 / 测试名只增不删。barrier tax:split − push 的逐线程 CPU 增量(inproc 传输 + verb barrier 的代价)。
历史
本目录此前是一份 328 KB 的实施计划(PLAN.md)加 135 KB 的设计竞赛与评审记录(REVIEW.md);设计定稿后只保留设计与架构本身,评审记录与早期草案留在 git 历史(8b31de2f、1794ac94、8349babe、87ee17c6)。P5b 收官后(ea34bccb 及之前)各文档的完整历史叙述、-O0 设备表与逐轮审查记录同样以 git 历史为准;集成者的逐条裁定长文(ID-1..75)在 ef35ea0c 之前版本的 CURRENT_STAGE_PROGRESS.md。