- README, ARCHITECTURE, ROADMAP, MEASUREMENTS and CURRENT_STAGE_PROGRESS are rewritten as indexes
(84 KB -> 15 KB): what the project is, where it stands, and where each detail lives. ROADMAP is one
plain sentence per phase; MEASUREMENTS is the five conclusions that matter plus one line per phase;
CURRENT_STAGE_PROGRESS is the P12 goal, a checklist and the next steps.
- ARCHITECTURE's body moves unchanged into ten design/ files, keeping §1-§17 and appendices A/B, so
`ARCHITECTURE.md §N` references in code resolve through the table in ARCHITECTURE.md.
- guide/ holds build-and-run, code map, glossary and the engineering discipline (from README and
ROADMAP), and the device pinning record that used to sit in devices/.
- The open-debt table moves to notes/DEBTS.md; the detailed current-stage tables (with decision IDs,
the open line items and evidence locations) move into notes/p12/README.md. notes/README.md maps
every moved path and section.
- The documentation citation lint in test.yml also covers design/ and guide/, which describe the
current tree as the top-level files did.
- ROADMAP, MEASUREMENTS and ARCHITECTURE are rewritten as summaries (333 KB of index text -> 84 KB).
ROADMAP's phase table is one line per phase plus a link; MEASUREMENTS keeps headline numbers under
its old §1-§13 numbering (plus §14-§16 for P6.5, P7 and P12); ARCHITECTURE keeps every decided rule
under the same §1-§17 / appendix numbering, so the `ARCHITECTURE.md §N` references in code still
land, and §17 becomes an index of the phase landing shapes.
- CURRENT_STAGE_PROGRESS now describes the current stage (the P12 on-screen-server subset) and absorbs
CURRENT_STAGE_STATUS, which is removed. The P7 status tables, the P6 closing snapshot and the P6.5
first-wave snapshot move to notes/p7, notes/p6 and notes/p65.
- Each phase gets notes/<phase>/README.md: a short summary, then the verbatim material that left
the index documents (its ROADMAP row, its MEASUREMENTS section with subsection numbers kept, its
ARCHITECTURE §17 part, milestones) and a file index. P8-P11 and P13 get their planned scope;
the full open-question list moves to notes/OPEN-QUESTIONS.md.
- The phase reports that sat at the top level move into their phase folders with unchanged names:
P5D-INPROC-PERFORMANCE, P5E-RUNAHEAD, P5F-WIRE-COMPLETENESS, P6-SPAWN-PLAN, P6-CONTRACT-DRAFT,
P6-ENDSTATE-REVIEW. Their relative links, CONTRACT-P6.md's links to them and one tool docstring
are updated; notes/README.md maps every old path and section number to its new place.
- 71 files under notes/recovered/ that were byte-identical copies of phase-folder files are removed.
- Corrections made while condensing: the server process reads Transport as Spawn (CONTRACT-P6 §3.1
amended the old "child forces monolith" rule); both backends now publish kCapRunAheadApply;
MOBILEGL_IPC_RESPAWN is a named refusal and MOBILEGL_IPC_IDLE_EXIT_S is not parsed; the Redmi
pin row is in tools/device_bench/pin_device.sh.
check_doc_citations over docs/Disaggregated/*.md: 0 problems. No relative link is newly broken.
- notes/p12/INTEGRATOR-DECISIONS-P12.md (new): ID-P12-1..4 the subset's shape (the user rulings, one surface mode per session, the lost-window order, the in-process thread hand-off), ID-P12-5..11 the review round's ten fixes (two majors: the lost window answered before every ring record, the ended session's Espryt unit shadows emptied with its twins), ID-P12-12 IterationRP out of scope, ID-P12-13 the device stage not re-run in this environment.
- ARCHITECTURE.md §15.2: the deleted Surface -> AIDL window path is struck through, and the server-owned window path, the lost-window contract and the in-process session boundary are described.
- ROADMAP.md: the P12 row's status names the review round and that the device checks were not repeated.
- ph-f.md: §0 rows F-a..F-d with package-tree SHAs; §2.2 states the asymmetry (new server + old client -> Refuse{WireFingerprint}; old server + new client -> the old AcceptPair closes both after 2000 ms and the client sees `no Welcome ... (rc=6)`, no Refuse frame); §6 the four fix commits with their red-once lines; §6.4 the unix arrival-order pairing (250 ms / 2000 ms) as a local-peer debt with the SELinux assumption named, and the two pre-auth exposures; §7 the gates on 2b2a0ae0
- CONTRACT-P7 §12: the two pre-auth exposures (fork before Hello with a 10 s wait; ValidatePeerHandshake before AuthenticatePeerToken sends the fingerprint and build stamp to an unauthenticated peer), the unix pairing debt, and the fingerprint asymmetry, for PH-7 (5)
- PLAN-PH-P34B-P7: PH-7 (3) says the minimum is checked at the TCP listen; PH-8 says "ignored, server-sized" rather than "clamped"; the no-token listen row's remaining-work cell no longer claims the smoke is unreferenced
- device-window-1-runbook §2 step 3: the un-redeployed-phone symptom, and where to look first
- ROADMAP §6 and peer-loss-probe: `MOBILEGL_IPC_TOKEN=devtoken` (8 bytes, which now exits 72) becomes a 25-byte token in every example
- the two ROADMAP row segments E1 changed that did not merge onto the integrator's rows
are re-applied by hand (host census results, P9 exception list empty, wave 3 items done)
- the running table names the fable rounds B2 r3 and B3 fix r2 and the F review
- the census and §7.2 pages were written against 1135c664 before the trailer rewrite; the
citations now name its rewrite 3c80cd62 and the other remapped commits
- the trailer rewrite the user asked for is recorded (origin 1135c664 -> 3c80cd62, same trees)
- CONTRACT-P7 §12 transcribes the debt lines from magma-b2.md §6, magma-b3.md §7.2,
verify-split.md §6 and ph-f.md §4
- the status page's gate table, landed table, running table and next steps follow
- 144 commits from 785fed0b0 onward were rewritten to drop the Co-Authored-By trailer the
project forbids; origin/feat/disaggregated moved from 1135c664 to 3c80cd62 (same trees)
- the old->new map is ~/w7/logs/sha-map-20260922.txt; every 7..40-hex citation in the
Disaggregated docs and the MG_Remote contracts that matched an old SHA is replaced by the
same-length prefix of its rewrite; no other content changes
- the sixteen unpushed integration commits after 1135c664 were rewritten to drop the
Co-Authored-By trailer the project forbids (commit-style rule, user 2026-07-15 and
2026-09-09); their SHAs changed, so every citation of the old SHAs is remapped here
- no content change beyond the SHA text
The status page's exit-gate table now says item (7) verify x split is reported and
on pipe pending its gate and review, and the running table names the B3 fix round
and the V1 review.
The status page and the ROADMAP P7 row now say what is in flight after the six
packages were relaunched on claude-opus-5-5: B2 rework round 2, B3 rework, M2, V1,
F and E1. pipe stays at 1b5d97bd and is not pushed until round 2 lands.
p7w5 (B3 on top of B2 and D3) renders OpenRA to the golden on every arm
the acceptance asked for - inproc and spawn, run-ahead and lockstep,
cold and warm, FIF=8 and the dump-armed variant that failed 0/5 before -
and the three regressions are bit-identical to p7w4. Gate 3's anchor
case is closed; bsl-esc-menu (M2) and the three-repeat final form remain.
docs/Disaggregated/CURRENT_STAGE_STATUS.md is new: the nine-item exit
denominator with evidence, what landed, what is running, what is next.
The ROADMAP's P7, Ph and P3b/P4b rows carry the wave-2 landing, the 6/9
checkpoint and the open items, and OQ-8/10/13 are marked answered.
ROADMAP.md: the Ph / P3b-P4b / P7 rows carry the audit's verdicts and the factual
corrections it found - the @P7 refusal list is 15 sites in 4 files (the row printed 8),
the 29-commit DirectVulkan shape wave was never recorded, the device divergence is two
observations with no per-case attribution and no lockstep control, SetupDrawSnapshot /
content-addressed CSO are declined for this stage, "XFB scatter to client" is retired
in favour of the two real holes, readback/pack state splits into closed and open
halves, the NDK size pin is obsolete, PACK-PBO readback landed in 70df57bb, the ABI
fingerprint landed in P6.5, and OQ-8 / OQ-10 / OQ-13 / OQ-21 get their current answers.
P6-ENDSTATE-REVIEW.md:284 qualifies an Init.cpp citation the lint reported ambiguous.
MG_Remote/CONTRACT-P7.md: rules I (no std::abort on the Magma wire arm) and J (every
fix reds once on a two-process arm), the five exit gates in testable form, the
retire-vs-decline table for every @P7 name, the ratchet's definition and P7 target,
the nine-subsystem denominator for the 40% checkpoint, the wave-2 file partition,
and the amendments to CONTRACT-P6. Census, ratchet and lane numbers are marked
待填 until wave 0's packages report them.
The device gate: Redmi 2f7cbe2e, reboot-clean, paired A/B in one thermal
window (arms interleaved, best-of-3 then best-of-2), rd12 + DirectGLES.
inproc vs spawn client CPU p50 7.880/7.889 vs 7.876/7.869 (-0.15%) and
7.987/7.989 vs 7.992/8.009 (+0.16%) - a tie inside the 0.2-4.2% within-
arm spread, sign flipping with arm order, recorded and not gated.
monolith is ~30% dearer. 22/22 runner exits clean, 44/44 PINNED, zero
Fatal.
The three mandatory numbers: socket doorbell vs condvar is a tie too -
client 121.1 waits/frame identical across transports, server 10 866-11
963 (inproc) vs 10 415-10 416 (spawn) waits/frame, and the contract's
'converting that into ~4 blocking reads may be cheaper' did not pay off;
the only column where the socket is worse is clipark/f (6.07 vs 5.60/5.75).
SEG_STAGE bytes/frame: 130.8 KB median / 8.01 MB steady (OpenRA), 816.2
KB / 1.53 MB (rd12). Records/frame post-chunking: 211/206 and 7 497/7
504. maxrec stays 1808 - the 8 MiB chunk budget is never reached. Both
framings reported throughout (the startup window runs ~7x the steady
state) rather than the flattering one.
MEASUREMENTS.md gains section 12 with the full protocol and tables; the
6.3 'no post-chunking distribution exists' gap now points there.
CURRENT_STAGE_PROGRESS.md marks gates 7/8 met and records the closeout
work plus two structural limits (spawn client windowed fields are zero
by construction - OnPresent runs in the server process - though its run
totals are valid stores; the stats dump is role-derived). ROADMAP marks
P6 closed in the stage table, the header and the milestone.
Evidence: notes/p6/gate7-device-ab.md, gate8-doorbell-device.md,
gate8-wire-counters.md, git-worktree-fix.md. check_doc_citations: 82
citations in the three documents, 0 problems.
ROADMAP gains the section "the immediate next item": a design, not an
implementation, for running the frontend on an x86_64 WSL process and the
backend on the Redmi over TCP, with the integration lane and the CI retrace
subset as the acceptance. The P6.5 row now points at it.
What the design rests on, verified in the tree: the control plane already
treats the rendezvous as a NAME with two ordered connections (SocketTransport),
ClientSession::StartOverSocket already separates "how the socket came" from the
handshake, MGPBlobRef addresses kSegStage only through one ResolveOrFatal, the
reply header and the event heads are already wire-shaped, LogLine exists in
CtrlMsg with no producer, goldens are shared between desktop and device, and
the trace APK can already exec libMobileGLServer.so from nativeLibraryDir.
What it does not rest on, stated rather than assumed: ILink is declared and
unused beyond LinkProgress, ShmLink does not exist, both sessions hold
SessionSegments directly - the lk seam body from the end-state review was never
built and is this wave's first package (lk2). The manifest has no INTERNET
permission.
The mechanism: StreamLink as mirrored private segments replicated by messages -
same sizes both ends, same offsets, so the codec, the watermark rules, the apply
thread and the encoder do not change; RingControl becomes Progress frames sent
on flush-on-idle (the recorded amendment to "appliedSeq is never lazy": late by
at most one flush, never early); replies become seq-stamped messages; the event
ring is mirrored with the P5e blocking rule intact. Cross-architecture makes
the PipeFields.def layout digest mandatory (wf). Server logs on another machine
make LogLine forwarding mandatory (lf) so the 34 server-log readers stay
unchanged. A --serve supervisor forks one child per session on the device,
started by a foreground Service in the trace APK.
Packages lk2 -> wf -> ct -> sl -> lf -> sv -> t65, each with red-once; the gate
list, the mandatory numbers (kWaitReply per frame x RTT, SEG_STAGE bytes/frame
against the link, PRESENT_CREDIT 1..3), the two-sided configuration runbook and
the risks (RTT per reply row, single large uploads, AP isolation) are in the
section. check_doc_citations: 74 citations, 0 problems.
The end state is re-ruled: client and server may sit on different machines,
OSes and architectures, joined over TCP. The AVF pVM / AF_VSOCK end state the
P6 end-state review assumed is withdrawn (retraction at its head, form D added
to its table, the vsock probe and both external unknowns struck).
The transport stack becomes two independently selectable axes, negotiated in
the handshake and mixable: control plane (ITransport: fork / unix:<path> /
tcp://host:port) and data plane (ILink: ShmLink / StreamLink). On one machine
control over TCP with data over shared segments is a legal pair; ShmLink brings
its own AF_UNIX aux rendezvous for SCM_RIGHTS, so ITransport narrows to control
frames. `auto` is decided by a successful segment delivery, never by inspecting
addresses, and a fall-back is named. Nothing above Transport/ may branch on the
link kind. ARCHITECTURE.md gains 11.9 for this; CONTRACT-P6.md gains 10.3.
ROADMAP: P6.5 and Ph get rows (both were referenced by the contract and absent
from the stage table); the IPC track becomes P6 -> P6.5 -> Ph -> P12 -> P9 ->
P10 -> P11(same-machine arm). Every later row is reconciled against the tree:
items already landed are struck (client vertex arrays, client-minted query
handles, credit default 1, SEG_EVENT overflow mechanism), the unreachable P7
gate (`nm | grep glslang` on a server image that IS libMobileGL.so) is replaced
by the 184-symbol ratchet share, fixed-width wire form moves from P7 to P6.5,
P12 is cut down per the review (server-owned display, no Surface passing), and
the debt table's stale claims are corrected: class C is down to two slots, not
15 and not 511; PACK-PBO and the 2 MiB reply cap are P9's, not P6's.
Verified against the tree and recorded honestly: the contract's three hs rows
(LinkTerms, Refuse, the fingerprint split) never landed - protocol.fbs has
neither - so CURRENT_STAGE_PROGRESS.md's claim that S6 ran red is withdrawn and
the rows move to P6.5; the 184-symbol ratchet gate does not exist in CI; the
server process never initialises PipeStats, so gate 8's `srv=0 srvpark=0` is a
structural zero (fix in progress in the tree, not in this commit).
check_doc_citations.py: 159 citations, one pre-existing basename ambiguity.
All ten P6 packages (a6/c6/lk/so/sm/cp/hs/dl/st/t6) are on feat/disaggregated
through 16bfab10. The two docs now say so honestly:
- ROADMAP.md (cumulative): the status line, the P6 stage row, and a new
milestone bullet record every package landed, exit-gate items 1-6 met, and
items 7 (device paired A/B in one thermal window) and 8 (the three mandatory
perf numbers) still pending -- so P6 is "implementation complete, exit
perf/device numbers pending", NOT closed.
- CURRENT_STAGE_PROGRESS.md: rewritten to hold ONLY the current stage. All
P5* history is gone (it lives in ROADMAP.md and the P5* reports); what
remains is P6's package table, the CONTRACT-P6 section-9 gate with each
item's honest status, the device results, the per-role log split, and the
explicitly-not-P6 list.
c6 is P6's contract package. It lands CONTRACT-P6.md plus two headers and
changes nothing: no caller moves, no byte moves on any wire.
THE CONTRACT supersedes P6-CONTRACT-DRAFT.md, which was written before its own
audit and is wrong in four places - the ABI row, "the latch is implemented
unchanged", "cp is transport only", and "a transport swap and nothing else".
a6 measured all four. It carries 21 rulings, of which the load-bearing one is
D1: the spawned child keeps Transport == Spawn and anti-recursion becomes a
separate Dial axis. ARCHITECTURE.md:488's literal instruction is amended,
because 226 live lines test `Transport != Monolith` to select the SERVER arm
and forcing Monolith flips 148 MG_Backend lines to frontend glue in the one
process that has no frontend.
That ruling can be stated normatively without changing behaviour because of
something a6 found and the contract exploits: TransportMode::Spawn is
UNREACHABLE at this head. ConfigLoader.cpp:344 is the only writer for the
string "spawn" and it writes Monolith. So every rule conditioned on
Transport == Spawn constrains a state no process can enter - and the same fact
is why ConfigLoader's named refusal cannot currently falsify itself, which is
sm's to fix and §9.5's arm-proof gate to catch.
THE SEAM. ITransport says in its own header that the hot path bypasses it;
below it there was no interface of any kind, because Ring.h, ReplySlot.h and
EventRing.h each take a raw void* plus a capacity. ILink.h is that missing
thing. It is setup-time, not hot-path: no method is called per record or inside
a spin predicate, because Doorbell::Wait's predicate runs 1e5-1e6 times a frame
reading watermarks straight off the page, and because the only lane that could
measure a virtual there has four times the dispersion of the effect - a gate
that can only print "within noise" is ID-124 one level down.
StreamLink.h is declared and implemented by nobody, and that is its job: ILink's
adequacy is a claim only a compile can settle. Writing it forced three methods
the brief did not name - ResolveSpan, FlushProgress, and the reply pair - so it
has already earned its keep. Delete one ILink method it declares and the build
goes red.
Deliberately NOT here, each for a reason the contract records: Watermark::Reached
is not redefined (SessionRings.h owns it); Ring.cpp's reserve/pop bodies are not
relocated into a header that would then need the logger; RingControl is not
regrouped, because that rename is 109 production sites with five behind a
non-Android #if, so it is lk's with a published itemisation; and the schema rows
are specified but left to hs, because deprecating SurfaceReply.defaultFb while
appending `result` changes CreateSurfaceReply's arity and the existing
six-argument call would silently bind its defaultFb 0 to result.
INERTNESS IS STRUCTURAL, not measured. Zero object dependency files reference
either header, zero build rules do, and nothing in the tree includes them.
Verified anyway on both flavours: pull and split each have 0 symbols added,
0 removed, and .text byte-identical (10822147 / 11681395). check_doc_citations
resolves all 61 citations.
a6 is the read-only audit P6-SPAWN-PLAN puts first. Seven static items, each
produced by one auditor and re-resolved line by line by one adversarial
verifier; 198 rows, 65 of them contested, and only the surviving ones carry
into the report. Item 5 - can the server link without MG_Impl - is the one
experiment, and it is answered.
The headline is that P6's transport half is smaller than the plan assumed
(fc and fs really did land) and its process/role half is much larger. Four
statements in P6-SPAWN-PLAN / P6-CONTRACT-DRAFT are false at this head:
- `spawn` is not an observable state at all. ConfigLoader.cpp:339-346
recognises it and then writes Transport = Monolith, so "the child was
forced to monolith" and "the parent fell back" are the same value and
that named refusal cannot falsify itself. Meanwhile 226 live lines test
`Transport != Monolith` to select the SERVER arm, 148 of them in
MG_Backend - so ARCHITECTURE.md:488's rule, implemented literally, flips
the whole backend to frontend glue in the one process with no frontend.
- `cp` is not transport-only: the InitCapabilities REQUEST has no wire form,
and the codec refuses to encode the kind a live client still calls.
- the device-lost latch is not implemented; it was booked as carriage.
- the server cannot link without MG_Impl: 184 symbols, 177 of them real
function calls, owed 101 to P7 / 14 to P3b-P4b / 60 shared / 6 to P6.
There is also no module target to link, so the question could not have
been answered by editing a link line.
Four more blockers the earlier review missed: the apply thread aborts in
ConsumerDoorbell before popping its first record (contract 3.9's ruling, which
lk should retire rather than amend); neither side of the control plane is
wired to a socket; the control-reply wait has no deadline, so a frozen peer
wedges the GL thread inside eglMakeCurrent; and SurfaceReply cannot carry a
MobileGLResult, so a client cannot tell a dead server from a legitimate
refusal.
The abort census makes dl's funnel a redesign rather than a rename: 92 sites,
30 distinct family words against a 7-value wire enum, and three unbounded
peer-driven allocations with no try/catch anywhere under MG_Remote.
P6-ENDSTATE-REVIEW.md is the re-examination of P6 against the gfxstream-shaped
end state that produced a6's three added items. a6 overturned four of its own
claims - the MG_State eight's shape, the abort count, m_windowHandle's
injection points and a predicate name collision - and those are corrected in
place rather than left to be rediscovered.
Docs only. No code, no gate, no behaviour.
Every place that stated "P5 does not chunk" as current behaviour except the
Fatal texts (previous commit) now records the stage chunk budget and what it
does not cover.
- CONTRACT-P5.md section 5: the STAGE_MB row names MGPipeStageChunkBytes() =
clamp(segment/4, 4096, segment), the two buffer walks (1e7c372e) and one
texture level's whole-width slabs (9469d48e, assembled by
StagedTextureStore::AdoptRun), and the Fatal that stays the backstop for a row
with no cut; the RING_MB row says the record bound is about the record's own
bytes.
- BRIEF-P5.md's R-10 section is no longer headed "does not chunk": it keeps the
record bound and the maxrec proof obligation unchanged and records that
content is cut, with the encoder Fatal as the fallback.
- ROADMAP.md's staging debt row and open question 11, ARCHITECTURE.md's
record-bound bullet and SEG_STAGE table note, README.md's knob row,
MEASUREMENTS.md section 6.3 and CURRENT_STAGE_PROGRESS.md's open item: the
explicit MOBILEGL_IPC_STAGE_MB=256 profile is no longer needed for the two cut
paths, and the carrier design for the rest stays P8.
- Historical results (notes/**/p5-results/, p5b/) are left exactly as recorded.
The twelve Server* forwarders' one-slot mailbox carried a raw function
pointer plus a void* to a stack-local Args struct (P5c audit row G4);
neither means anything across a process boundary. The slot now carries
one SurfaceControlFrame by value: kind is the op, scalars are the
arguments, and ok/eglMajor/eglMinor come back in the same value. The
blocking handshake, the shadow, the doorbell order and the C2 exit
block are unchanged.
- protocol.fbs: append-only - SurfaceOpKind gains SetSwapInterval=8,
ReleaseResources=9, SetWindowHandle=10; WindowKind gains MetalLayer=6;
SurfaceOp gains readSurface and context (the MakeCurrent four-tuple).
protocol_generated.h regenerated with the pinned flatc.
- Server/SurfaceControlFrame.{h,cpp}: the frame (trivially copyable by
static_assert) and the op enum - ten wire kinds plus four inproc-only
kinds (InitCapabilities is answered by CapsSnapshot on the wire,
SwapBuffers/InitWindowSurface have no production caller - f0-egl F8,
kept for the inproc test lane).
- Protocol/SurfaceOpCodec.{h,cpp}: the frame <-> SurfaceOp/SurfaceReply
codec, the explicit WindowBackend <-> WindowKind table, and the wire
entry ServerApplyWireSurfaceOp whose refusals are named:
Fatal{UnmigratedSurface, "AndroidNativeWindow@P12"} and
Fatal{ProtocolCorruption, "SurfaceOp"}.
- ServerLoop: RunOnApplyThread(fn, void*) -> RunSurfaceControlFrame(frame)
plus the dispatch ApplySurfaceControlFrame; the old per-forwarder Args
bodies moved into the dispatch unchanged (C7/ID-54, N-3, R-12 included).
RunProbeOnApplyThreadForTesting is the test seam through the same
channel (the hook lives in a member, never in the slot).
- Tests: RemoteClientTest/ServerLoopTest migrated to the probe seam; new
SurfaceControlFrameTest suite (mapping tables, wire round-trips, the
two named refusals) plus ServerLoopTest's AVoidForwarderCrossesAsOne-
DispatchedFrame (the frame channel's red-once handle) and
ServerLoopEglTest's TheInitializeDisplayReplyArrivesThroughTheFrame.
P6's premise is that it is "only a transport swap". That premise was bought by P5c and has
expired. Measured on this head, the two roles still share state directly, so a spawned server
would have no source for it. P5f is the phase that makes the premise true, and P6 does not
start before it.
WHAT THE MEASUREMENT FOUND
- FieldOwnership.def still carries 21 BARRIER_PULLED rows over 15 distinct fields. That class
is defined as "the server answers by reading a value the client's residual fill left in THE
SINGLE SHARED gPipeInputs while the verb barrier holds both threads apart". Eight of those
fields were retired by P5e for Espryt's unbarriered path only - Magma has not moved at all.
The strict lane measures 10 live <field>@<verb> pairs today.
- gPipeInputs (MG_Backend/MGPipe/PipeInputs.h:835) is a plain process global,
`inline PipeInputs& gPipeInputs = *new PipeInputs();` - not a shm segment. The client fills
it (MG_Impl/Pipe/PipeFill.cpp), the backend reads it. Under spawn the two processes have
DIFFERENT objects, the 15 BARRIER_PULLED fields have no filler in the server's copy, and
every read is Fatal{UnmigratedPipeInput}. MG_Impl is not in the server, so "let the server
fill it" is not available either. The header says this itself at :279 and :902.
- The twelve Server* EGL forwarders do not use the wire at all: they post a function pointer
plus a stack-local void* through a one-slot mailbox (ServerLoop.cpp:533-568, :645). The
SurfaceOp / SurfaceReply / WindowKind schema is defined in protocol.fbs and unused.
- Process-level statics with per-context semantics (g_syncedRenderStateParameters,
ScopedDefaultUnpackState::s_synced) - and the full list is unknown, because this defect class
is structurally invisible to inproc.
- MGPipeFrontendKeyedRegistryScope is still live at ~12 sites in DirectGLES.cpp, carrying
P3b/P4b's debt: the registry is still keyed by frontend address / lifetime id.
THE SCOPE RULE
P5f takes the cross-process-blocking subset of P3b/P4b/P7/P8/P9 and nothing else. One test:
does it still hold in another address space? No -> P5f. Yes but slow or ugly -> it stays with
the phase that owns it. So Magma's nine fields and its direct writes into client storage come
here; content-addressed CSO, internal shader baking and the fixed-width rewrite stay P7's. The
reverse channel's asynchrony and ordering stay P9's; only the parts that touch client memory
move. Class C is NOT P5f's - a named refusal behaves identically in two processes.
THE CENTRAL MECHANISM: A TWO-BLOCK REHEARSAL
P5c set the same rule (rule E) and checked it by AUDIT - a human reading 59 lines. P5f checks
it by MACHINE: give each role its own PipeInputs under inproc, and its own copy of every
per-context static, behind a knob. Anything that depends on the two being the same object
becomes Fatal{UnmigratedPipeInput, "<Field>@<Verb>"} with the field and verb named.
That rehearses the process split's SEMANTICS without a second process. It matters because
today "the server read the value the client filled" and "the server read the value a record
carried" are indistinguishable at runtime - which is exactly what P6 would discover on day
one. The package order puts the mechanism (f1) BEFORE the migrations deliberately: let the red
appear first and let it be the worklist, rather than having each package declare itself done
and then looking for a criterion.
Exit gate: the two-block lane green; strict-expected-markers.txt EMPTY with its two-sided
ratchet still armed; zero BARRIER_PULLED rows; rsp reading zero per frame; Magma judged by the
same criteria as Espryt. The negative control is that turning the two-block knob OFF must move
at least one named case from green to red - otherwise the mechanism proves nothing, which is
ID-122's lesson.
ALSO IN THIS COMMIT
- ROADMAP gains the P5f row and the IPC track becomes P5e -> P5f -> P6; P6's status cell
becomes "blocked on P5f".
- README and CURRENT_STAGE_PROGRESS gain the same, plus the file-map entry.
- Both P6 documents gain a blocked banner naming what is not true yet.
Doc citation lint: 124 citations across docs/Disaggregated/*.md, 0 problems.
Two things land together: the plan and contract draft P6 needs before it starts, and the
working notes that until now existed on exactly one machine.
1. P6's plan and contract draft (neither started; not one line of code)
docs/Disaggregated/P6-SPAWN-PLAN.md the package plan
docs/Disaggregated/P6-CONTRACT-DRAFT.md the contract draft (moves to
MG_Remote/CONTRACT-P6.md when c6 lands)
The three findings that mattered, all written into the documents:
a. P6 is SMALLER than its roadmap cell suggests. The transport primitives are already in
the tree and already tested: SocketDoorbell including hangup detection and the two
lost-wakeup fences (Doorbell.cpp:211-360, four cases in FdPassingTest), SCM_RIGHTS fd
passing, ShmSegment::Adopt, and the SurfaceOp / WindowKind schema already defined in
protocol.fbs. inproc uses a real second shm mapping rather than an alias, and
SessionRings.h:22-28 says that was done so today is not the first time it runs. P6 is
assembly plus a control plane plus a process, not "write a socket transport".
b. The evidence for "P6 is only a transport swap" has EXPIRED. It was bought by P5c, whose
audit found 59 direct memory accesses in a tree that already looked clean. P5e changed
the tree again. So the first package, a6, is a read-only audit that writes no code, and
every contract row that depends on it is marked PENDING a6 rather than decided in
advance.
c. P6 does not get a game running on the phone. ANativeWindow* is meaningless in the child,
and protocol.fbs:186-196's own comment says Android transfers the window out of band -
that band is P12. P6 lands pbuffer / surfaceless / offscreen, which is what HeadlessGL,
the split-equivalent lane and trace replay need, and which is exactly what P6's own exit
gate measures. A real window reaching the server is a named refusal. This gets its own
section because "P6 is done" would otherwise read as "the game runs now".
The contract adds rule G: a role may not name a process-local handle. It extends P5c's
rule E (a role may not name the other role's memory) from memory to identity - EGLDisplay /
EGLSurface / EGLContext / ANativeWindow* / fd number / pid / mapped address either cross as
a token this contract defines or they do not cross, and a descriptor crosses only through
SCM_RIGHTS, where the kernel renumbers it.
What P5e left for P6 gets its own section. The latch semantics are already designed
(ARCHITECTURE.md:504) and are copied unchanged. What is new is that after run-ahead the
client no longer waits while the peer process can DIE: the client holds records that were
published and will never be applied, and Android's freezer suspends the child without
closing anything. So slow and dead must be distinguishable WITHOUT a timeout threshold.
That is P6's only new design; everything else is carriage. It shares a predicate with E1's
outstanding re-specification (ID-122), and the two should be designed together.
Two gates carried over from P5e's lessons: G2 requires integration-spawn's test-name set to
match integration-split's name for name, because a differing set means the lane is quietly
running less; and the arm-proof gate requires every entry to record the child pid and
transport=spawn in its OWN private log - ID-124 established that this kind of false green
really happens, and a spawn lane that actually ran monolith would pass every other gate.
S2's shape must be settled before it is written, and the document says why: E1 is the
cautionary case.
2. The working notes move into the repository (docs/Disaggregated/notes/, 415 .md files)
ROADMAP / CURRENT_STAGE_PROGRESS / MEASUREMENTS cite ruling numbers, audit line numbers and
the provenance of gate figures from ~/w7/notes/, a directory that exists on one machine and
is under no version control. A record cited hundreds of times that lives only locally is not
a record, so it moves in whole, with its directory structure intact.
Only .md moves. Scripts, run logs, census and gate result JSON, patches, APKs and nm dumps
stay where they are: they are evidence DATA rather than documents - large, regenerated per
run, and mostly carrying absolute paths and device serials that mean something only on the
machine that produced them. The mapping and this split are written in
docs/Disaggregated/notes/README.md.
Two exceptions are recorded there too: P6's BRIEF has been promoted to a first-class
document and keeps no copy under notes/, so the two cannot drift apart; and recovered/ holds
material salvaged from failed workflow runs, which may duplicate the like-named phase
directories and is kept because a few of those were the only complete version at the time.
CI's citation lint takes docs/Disaggregated/*.md only (non-recursive), and notes/ is
deliberately outside it: those notes' file:line citations were written against their own
code heads, and resolving them against today's HEAD would fail wholesale - which is not an
error, it is their correct state as a historical record. To check one, use the revision it
declares (--rev).
3. Inconsistencies fixed in passing
- README.md's status line still said P5e was in progress while the stage table already said
closed.
- CURRENT_STAGE_PROGRESS's next-step item 1 still listed the exit gate as pending, though
(a) and (b) were run in the previous commit; rewritten to closed plus the one item that
actually remains (E1).
- ROADMAP's P6 row still had the pre-phase plan in three of its cells; it now carries the
package order, the scope boundary and the two new gates.
Checked with check_doc_citations.py: 125 citations across docs/Disaggregated/*.md, 0 problems.
It said "in progress" because BRIEF-P5E section 3's exit gate had never been RUN, not because
the work was unfinished. It has now been run, item by item, recorded in ROADMAP's P5e
exit-gate cell:
- item 1: unit 2256/2256 under both strict arms.
- item 2/3: integration-split 179/179; the per-entry census has zero Fatal{ and exactly eight
Admitted{ rows.
- item 4(a): RUN_AHEAD=0 as the PAIRED control, 179/179 green - same server code, same
records, the only difference is whether the client waits.
- item 4(b): VERB_BARRIER=0 goes red (62/179 in the lane).
- item 4(c): Magma logs, verbatim, "run-ahead requested, server does not publish
kCapRunAheadApply - running lockstep", and the Espryt control logs "run-ahead ARMED". Both
taken from each entry's own private log.
- item 5: red-once rerun on the integrated tree, in the form ID-121 reordered it into -
reverting pa's arm yields GetProgramForDraw@DrawArrays, reverting mv's yields
GetBoundVertexArray@DrawArrays, EXACTLY ONE NAMED PAIR EACH, and each restores green.
- item 7: MOBILEGL_IPC_AUDIT=1, 179/179.
- item 6's G1 remains CI's to assert (ID-123).
The only item that does not pass is E1's control script itself (ID-122), and the diagnosis is
sharper than before: with its two masking defects fixed it is still red, and the
Fatal{BarrierViolation} it demands appears ZERO times in the whole run - at BATCH_WAITS's
default of 1 that overlap does not happen, and with run-ahead armed VERB_BARRIER=0 also
disarms run-ahead (ID-114), so the arm it produces is neither lockstep nor run-ahead. E1 needs
its falsification target redefined, not its threshold adjusted.
So the status is "closed, with one named outstanding item" rather than an unqualified close:
hiding a control that never passed behind the word "closed" is precisely the class of mistake
this phase kept recording.
The previous commit changed the status cell to "twelve packages landed, run-ahead armed" and
left the scope and exit-gate cells saying eight packages, 19 rulings, "the integration commit
flips kMGPipeP5eRunAheadReady", and an exit gate drafted BEFORE the phase started - several of
whose items later proved unexecutable as written. All three cells are rewritten:
- Scope cell: twelve packages in three waves (including fix1 / pa / mv / gl / ra2), rulings
ID-80..136, both constants flipped. It also names the largest migration (the per-draw
GetProgramForDraw) as having changed NO wire structure at all - the record already carried
the per-link ProgramArchive, and what was missing was a reader that still asked the frontend
object. Links to P5E-RUNAHEAD.md.
- Exit-gate cell: rewritten into what was actually measured (unit 2256, integration-split
179/179, integration-gpu 1357/1357, three flavours with each arm asserting its EFFECTIVE
compile define, strict hard green with zero Fatal, the device at VD32 level with monolith and
+69% p50 against lockstep), plus what has not been executed (the three negative controls, the
per-package red-once reruns, E1's control failing its own self-check, G1 still asserted by
CI), plus the criteria that are now VOID (rsp = 0 is empty by construction, rewritten by
ID-119; VERB_BARRIER=0 may not serve as the paired control, ID-114, because it also disarms
run-ahead).
- Debt table, rsp row: P5e rewrote what that number means. It now reads as the hard-green lane
plus eight Admitted rows, and says why the original criterion was empty - CountBarrierPull's
unbarriered arm sits before ++g_residualPulls and is [[noreturn]].
- Debt table, unmigrated row: client vertex arrays are a named refusal under run-ahead
(ID-82) and have their own expected-red lane, integration-clientarrays-split (ID-134);
staging stays P8's.
- Open question 18 added: the two sides of split are unbalanced (at VD32, apply 11-12 ms
against client 15.7 ms, with the client ~94% saturated). Moving work from client to apply
lowers the bottleneck directly - meaningless under lockstep, where the two add serially, and
a lever only because of run-ahead. It needs a fresh profile first: with the wait gone, every
tail item's denominator has changed.
- The header status line gains the P5E-RUNAHEAD.md link.
Doc citation check: seven files under docs/Disaggregated, 58 citations, 0 problems.
- New P5E-RUNAHEAD.md: P5e's phase report, a sibling of P5D-INPROC-PERFORMANCE.md. It carries
the twelve-package list, the three defect classes and the lesson each one cost (a runtime arm
no gate covered / build flavours no gate covered, where the FIRST gate added for them was
itself a false green / a guard that could never fire), the profile and both device tiers, the
unfinished items, and the next opportunity run-ahead unlocked.
- CURRENT_STAGE_PROGRESS.md: the stage table's P5e row becomes twelve packages + run-ahead
armed + ID-80..136; new section 2.7, the P5e landed-content table, in the same shape as
P5c's and P5b's; section 2.5 retitled as historical; two sections both numbered 4 fixed; five
P5e entries added to the open items; next-step item 1 rewritten from c0e to the evidence the
close still lacks; the ruling index extended from ID-79 to the load-bearing entries of
ID-136.
- ROADMAP.md: the P11 row gains P5e's correction - retiring the draw lockstep did NOT need
gPipeInputs versioning, because that race was in the metadata scalars. The row still holds
for the general case, and contract section 3.2's per-role stamp storage is still unlanded.
- README.md: the status line gains P5e and run-ahead, and "next is P6" becomes "P6 comes after
P5e".
Doc citation check: 3 problems, all pre-existing entries in CONTRACT-P5.md, none related to
this change.
- CURRENT_STAGE_PROGRESS.md gains section 2.6: the four packages (pa / mv / gl / ra2), the
admission rule's three disjuncts and which real entry forced each one, coverage going from
116 to 179 entries plus 1357, the race the flip exposed and its root cause, and the finding
that a hard-green strict lane is necessary and NOT sufficient (ID-132). Code head is now
25fba0d5.
- MEASUREMENTS.md gains section 11: the device matrix. The section leads with clock pinning
because the first matrix was run without it and had to be thrown away - monolith's OWN arm
moved 4.43 -> 7.07 ms/frame between two runs, and the SLOWER run was the COOLER one: the
governor had dropped policy0 from 2745 to 748 MHz. It records pin_redmi.sh's write order and
read-back verification, and why pin_device.sh refusing to guess this machine's serial is
correct rather than a gap. Conclusion: at both pinned tiers monolith and run-ahead each hit
the 120 Hz panel ceiling and only lockstep cannot reach it.
- ROADMAP.md's P5e row and status line now say twelve packages landed, run-ahead armed.
The phase is NOT closed: which arm is faster ABOVE the panel ceiling is unanswered (this
device cannot hold a higher clock), and BRIEF-P5E section 3's three negative controls and
section 5's per-package red-once reruns have been reordered by ID-121 to after the lane goes
green, so they have not been executed yet.
swung0x48