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MobileGL/docs/Disaggregated/notes/p3a/ab/ab-summary-oppo.md
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swung0x48 aba329cc53 [Docs] (Disaggregated): P6's plan and contract draft; the working notes move from a local directory into the repository 
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.
2026-09-18 23:31:39 -04:00

14 KiB
Raw Blame History

P2 paired A/B - per-thread CPU per frame (ms), trailing window, push - pull

pin columns: before/after verdict per run (P=PINNED, D=DRIFT = a cluster clamped by thermal management, U=UNPINNED) @ cpuss temperature C p50/p99: the runner's best-of-N repeat (lowest mean wall frame time), trailing tailFrames window, device median rule / nearest-rank p99; 'best' says which repeat

device case backend mode pull p50 push p50 d p50 pull p99 push p99 d p99 frames best pull/push pull acc/draw push acc/draw pin pull pin push
35d0befa minecraft-1.21.1-neoforge-create-instancing-in-world DirectGLES finish 771.937 769.946 -1.991 1540.659 1536.544 -4.115 2/2 run 2/3 / run 1/3 15.27 15.27 U@52.9/U@52.9 U@52.1/U@54.0
35d0befa minecraft-1.21.1-neoforge-create-instancing-in-world DirectGLES nofinish 825.877 775.026 -50.851 1648.361 1546.747 -101.614 2/2 run 1/3 / run 2/3 15.27 15.27 U@49.0/U@53.6 U@52.1/U@55.2
35d0befa minecraft-1.21.1-neoforge-create-instancing-in-world DirectVulkan finish 838.626 846.970 +8.344 1490.291 1507.965 +17.674 2/2 run 1/3 / run 3/3 11.27 11.27 U@53.6/U@55.6 U@52.5/U@57.1
35d0befa minecraft-1.21.1-neoforge-create-instancing-in-world DirectVulkan nofinish 839.236 849.688 +10.452 1492.840 1511.462 +18.622 2/2 run 3/3 / run 2/3 11.27 11.27 U@52.1/U@55.6 U@52.5/U@54.4
35d0befa minecraft-1.21.4-fabric-sodium-in-world DirectGLES finish 3.546 2.859 -0.687 6.761 6.936 +0.175 200/200 run 3/3 / run 2/3 15.64 15.64 U@46.3/U@47.8 U@46.7/U@48.2
35d0befa minecraft-1.21.4-fabric-sodium-in-world DirectGLES nofinish 3.598 3.828 +0.230 6.881 6.945 +0.064 200/200 run 1/3 / run 2/3 15.64 15.64 U@50.2/U@48.2 U@46.3/U@47.1
35d0befa minecraft-1.21.4-fabric-sodium-in-world DirectVulkan finish 1.474 1.486 +0.012 3.213 3.353 +0.140 200/200 run 1/2 / run 3/3 19.51 19.51 U@50.2/U@48.2 U@47.5/U@49.4
35d0befa minecraft-1.21.4-fabric-sodium-in-world DirectVulkan nofinish 0.565 0.647 +0.082 1.411 2.150 +0.739 200/200 run 1/3 / run 1/3 19.51 19.51 U@47.1/U@48.6 U@47.8/U@49.4
35d0befa minecraft-1.21.4-rd12-odinlite-in-world DirectGLES finish incomplete: push
35d0befa minecraft-1.21.4-rd12-odinlite-in-world DirectGLES nofinish incomplete: push
3B159D009VZ00000 improved-transparency-minecraft-26.3 DirectGLES finish 9.625 10.698 +1.073 25.806 26.407 +0.601 200/200 run 3/3 / run 3/3 8.39 8.39 P@47.0/P@46.4 P@45.3/P@47.7
3B159D009VZ00000 improved-transparency-minecraft-26.3 DirectGLES nofinish 9.741 10.542 +0.801 26.312 27.022 +0.710 200/200 run 1/3 / run 3/3 8.39 8.39 P@45.5/P@44.7 P@46.1/P@45.8
3B159D009VZ00000 improved-transparency-minecraft-26.3 DirectVulkan finish 8.120 9.064 +0.944 23.126 23.899 +0.773 200/200 run 3/3 / run 2/3 6.52 6.52 P@47.8/P@50.0 P@47.3/P@50.4
3B159D009VZ00000 improved-transparency-minecraft-26.3 DirectVulkan nofinish 8.162 8.973 +0.811 22.851 23.638 +0.787 200/200 run 1/3 / run 3/3 6.52 6.52 P@47.3/P@49.3 P@49.5/P@47.6
3B159D009VZ00000 minecraft-1.21.1-neoforge-create-instancing-in-world DirectGLES finish 1046.285 1048.879 +2.594 2084.086 2089.778 +5.692 2/2 run 1/3 / run 2/3 15.27 15.27 P@52.2/P@53.7 P@52.9/P@54.2
3B159D009VZ00000 minecraft-1.21.1-neoforge-create-instancing-in-world DirectGLES nofinish 1075.081 1060.064 -15.017 2142.660 2110.799 -31.861 2/2 run 2/3 / run 1/3 15.27 15.27 P@51.7/P@52.8 P@52.6/P@53.7
3B159D009VZ00000 minecraft-1.21.1-neoforge-create-instancing-in-world DirectVulkan finish 760.555 776.948 +16.393 1506.263 1538.494 +32.231 2/2 run 1/3 / run 3/3 11.27 11.27 P@51.8/P@51.9 P@50.1/P@49.7
3B159D009VZ00000 minecraft-1.21.1-neoforge-create-instancing-in-world DirectVulkan nofinish 758.298 760.035 +1.737 1501.555 1504.494 +2.939 2/2 run 1/3 / run 1/3 11.27 11.27 P@53.3/P@51.2 P@51.0/P@50.4
3B159D009VZ00000 minecraft-1.21.4-fabric-sodium-in-world DirectGLES finish 1.732 1.839 +0.107 3.085 2.966 -0.119 200/200 run 2/3 / run 1/3 15.64 15.64 P@46.4/P@48.9 P@46.5/P@47.8
3B159D009VZ00000 minecraft-1.21.4-fabric-sodium-in-world DirectGLES nofinish 1.896 1.841 -0.055 2.993 3.079 +0.086 200/200 run 2/3 / run 2/3 15.64 15.64 P@51.9/P@49.3 P@47.9/P@47.6
3B159D009VZ00000 minecraft-1.21.4-fabric-sodium-in-world DirectVulkan finish 0.402 0.457 +0.055 1.186 1.265 +0.079 200/200 run 3/3 / run 2/3 19.51 19.51 P@49.6/P@51.0 P@50.9/P@52.1
3B159D009VZ00000 minecraft-1.21.4-fabric-sodium-in-world DirectVulkan nofinish 0.399 0.437 +0.038 1.206 1.409 +0.203 200/200 run 3/3 / run 3/3 19.51 19.51 P@47.4/P@50.8 P@50.2/P@51.2
3B159D009VZ00000 minecraft-1.21.4-rd12-odinlite-in-world DirectGLES finish 9.944 12.852 +2.908 27.530 29.540 +2.010 200/200 run 1/3 / run 2/3 8.08 8.08 P@50.4/P@52.3 P@50.5/P@53.4
3B159D009VZ00000 minecraft-1.21.4-rd12-odinlite-in-world DirectGLES nofinish 9.938 12.963 +3.025 27.137 29.765 +2.628 200/200 run 3/3 / run 2/3 8.08 8.08 P@49.8/P@50.8 P@49.7/P@51.5
3B159D009VZ00000 minecraft-1.21.4-rd12-odinlite-in-world DirectVulkan finish 7.718 10.226 +2.508 24.451 27.359 +2.908 200/200 run 2/3 / run 1/3 6.16 6.16 P@52.8/P@54.3 P@53.6/P@52.1
3B159D009VZ00000 minecraft-1.21.4-rd12-odinlite-in-world DirectVulkan nofinish 8.001 10.161 +2.160 24.723 27.355 +2.632 200/200 run 1/3 / run 2/3 6.16 6.16 P@51.7/P@54.0 P@53.2/P@55.7

GO/NO-GO reading (items 3-4: p50 and p99 per-thread CPU deltas must not be negative for the push arm, i.e. push must not cost more)

Windows where push costs MORE CPU than pull (d > 0):

  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / finish: d p50 +8.344 ms, d p99 +17.674 ms
  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / nofinish: d p50 +10.452 ms, d p99 +18.622 ms
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / finish: d p50 -0.687 ms, d p99 +0.175 ms
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / nofinish: d p50 +0.230 ms, d p99 +0.064 ms
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / finish: d p50 +0.012 ms, d p99 +0.140 ms
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / nofinish: d p50 +0.082 ms, d p99 +0.739 ms
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectGLES / finish: d p50 +1.073 ms, d p99 +0.601 ms
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectGLES / nofinish: d p50 +0.801 ms, d p99 +0.710 ms
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectVulkan / finish: d p50 +0.944 ms, d p99 +0.773 ms
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectVulkan / nofinish: d p50 +0.811 ms, d p99 +0.787 ms
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectGLES / finish: d p50 +2.594 ms, d p99 +5.692 ms
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / finish: d p50 +16.393 ms, d p99 +32.231 ms
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / nofinish: d p50 +1.737 ms, d p99 +2.939 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / finish: d p50 +0.107 ms, d p99 -0.119 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / nofinish: d p50 -0.055 ms, d p99 +0.086 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / finish: d p50 +0.055 ms, d p99 +0.079 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / nofinish: d p50 +0.038 ms, d p99 +0.203 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / finish: d p50 +2.908 ms, d p99 +2.010 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / nofinish: d p50 +3.025 ms, d p99 +2.628 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectVulkan / finish: d p50 +2.508 ms, d p99 +2.908 ms
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectVulkan / nofinish: d p50 +2.160 ms, d p99 +2.632 ms

Memo gates, residual bytes and CSO counters (last complete window, push arm)

  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectGLES / finish: gates[ers=9780/7883 etl=9341/8322 eub=6951/10712 mfp=0/0 mpm=0/0 mdt=0/0] resid=30968.0 csom/csob=csom=29/csob=7741
  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectGLES / nofinish: gates[ers=9780/7883 etl=9341/8322 eub=6951/10712 mfp=0/0 mpm=0/0 mdt=0/0] resid=30968.0 csom/csob=csom=29/csob=7741
  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=282/13912 mpm=9408/4504 mdt=7544/6650] resid=30968.0 csom/csob=csom=29/csob=7741
  • 35d0befa / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=282/13912 mpm=9408/4504 mdt=7544/6650] resid=30968.0 csom/csob=csom=29/csob=7741
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / finish: gates[ers=81/859 etl=405/535 eub=405/535 mfp=0/0 mpm=0/0 mdt=0/0] resid=171.8 csom/csob=csom=2/csob=811
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / nofinish: gates[ers=81/859 etl=405/535 eub=405/535 mfp=0/0 mpm=0/0 mdt=0/0] resid=171.8 csom/csob=csom=2/csob=811
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/657 mpm=109/548 mdt=0/657] resid=171.8 csom/csob=csom=2/csob=811
  • 35d0befa / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/657 mpm=109/548 mdt=0/657] resid=171.8 csom/csob=csom=2/csob=811
  • 35d0befa / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / finish: gates[ers=16038/224 etl=16148/114 eub=16159/103 mfp=0/0 mpm=0/0 mdt=0/0] resid=162.91 csom/csob=csom=0/csob=209
  • 35d0befa / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / nofinish: gates[ers=16038/224 etl=16148/114 eub=16159/103 mfp=0/0 mpm=0/0 mdt=0/0] resid=0.0 csom/csob=-/-
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectGLES / finish: gates[ers=78960/1367 etl=75378/4949 eub=75199/5128 mfp=0/0 mpm=0/0 mdt=0/0] resid=185.36 csom/csob=csom=0/csob=1157
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectGLES / nofinish: gates[ers=78960/1367 etl=75378/4949 eub=75199/5128 mfp=0/0 mpm=0/0 mdt=0/0] resid=185.36 csom/csob=csom=0/csob=1157
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=10740/68928 mpm=67660/1268 mdt=78800/868] resid=185.36 csom/csob=csom=0/csob=1157
  • 3B159D009VZ00000 / improved-transparency-minecraft-26.3 / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=10740/68928 mpm=67660/1268 mdt=78800/868] resid=185.36 csom/csob=csom=0/csob=1157
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectGLES / finish: gates[ers=9780/7883 etl=9341/8322 eub=6951/10712 mfp=0/0 mpm=0/0 mdt=0/0] resid=30968.0 csom/csob=csom=29/csob=7741
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectGLES / nofinish: gates[ers=9780/7883 etl=9341/8322 eub=6951/10712 mfp=0/0 mpm=0/0 mdt=0/0] resid=30968.0 csom/csob=csom=29/csob=7741
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=282/13912 mpm=9408/4504 mdt=7544/6650] resid=30968.0 csom/csob=csom=29/csob=7741
  • 3B159D009VZ00000 / minecraft-1.21.1-neoforge-create-instancing-in-world / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=282/13912 mpm=9408/4504 mdt=7544/6650] resid=30968.0 csom/csob=csom=29/csob=7741
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / finish: gates[ers=81/859 etl=405/535 eub=405/535 mfp=0/0 mpm=0/0 mdt=0/0] resid=171.8 csom/csob=csom=2/csob=811
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectGLES / nofinish: gates[ers=81/859 etl=405/535 eub=405/535 mfp=0/0 mpm=0/0 mdt=0/0] resid=171.8 csom/csob=csom=2/csob=811
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/657 mpm=109/548 mdt=0/657] resid=171.8 csom/csob=csom=2/csob=811
  • 3B159D009VZ00000 / minecraft-1.21.4-fabric-sodium-in-world / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/657 mpm=109/548 mdt=0/657] resid=171.8 csom/csob=csom=2/csob=811
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / finish: gates[ers=16038/224 etl=16148/114 eub=16159/103 mfp=0/0 mpm=0/0 mdt=0/0] resid=162.91 csom/csob=csom=0/csob=209
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectGLES / nofinish: gates[ers=16038/224 etl=16148/114 eub=16159/103 mfp=0/0 mpm=0/0 mdt=0/0] resid=162.91 csom/csob=csom=0/csob=209
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectVulkan / finish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/16185 mpm=16027/158 mdt=16016/169] resid=162.91 csom/csob=csom=0/csob=209
  • 3B159D009VZ00000 / minecraft-1.21.4-rd12-odinlite-in-world / DirectVulkan / nofinish: gates[ers=0/0 etl=0/0 eub=0/0 mfp=0/16185 mpm=16027/158 mdt=16016/169] resid=162.91 csom/csob=csom=0/csob=209
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