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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

3.4 KiB

Raw Blame History

P4a device A/B - per-thread CPU per frame (ms), best-of-3 repeat, trailing window

device	case	backend	finish	pull p50	P3a boundary (0x1ff) p50	P4a (0x1fff) p50	d P3a-boundary	d P4a total	pull p99	P4a p99	pins pull/1ff/P4a	mpr 1ff/P4a
2f7cbe2e	improved-transparency-minecraft-26.3	DirectGLES	on	10.727	-	12.320	-	+14.9%	26.805	26.972	P/P / - / P/P	- / 8
2f7cbe2e	improved-transparency-minecraft-26.3	DirectGLES	off	10.716	11.754	12.124	+9.7%	+13.1%	25.297	26.841	P/P / P/P / P/P	8 / 8
2f7cbe2e	improved-transparency-minecraft-26.3	DirectVulkan	on	10.634	-	11.570	-	+8.8%	24.975	25.958	P/P / - / P/P	- / 0
2f7cbe2e	improved-transparency-minecraft-26.3	DirectVulkan	off	10.603	11.543	11.585	+8.9%	+9.3%	24.979	26.021	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	on	1.759	-	1.839	-	+4.5%	322.670	320.204	P/P / - / P/P	- / 2
2f7cbe2e	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	off	1.727	1.740	1.811	+0.8%	+4.9%	319.025	319.226	P/P / P/P / P/P	2 / 2
2f7cbe2e	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	on	0.736	-	0.788	-	+7.1%	455.587	462.612	P/P / - / P/P	- / 0
2f7cbe2e	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	off	0.742	0.788	0.786	+6.2%	+5.9%	462.639	454.128	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	on	1.312	-	1.458	-	+11.1%	2.370	2.554	P/P / - / P/P	- / 1
2f7cbe2e	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	off	1.312	1.406	1.454	+7.2%	+10.8%	2.423	2.524	P/P / P/P / P/P	1 / 1
2f7cbe2e	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	on	0.477	-	0.504	-	+5.7%	1.174	1.179	P/P / - / P/P	- / 0
2f7cbe2e	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	off	0.474	0.502	0.507	+5.9%	+7.0%	1.158	1.150	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-in-world	DirectGLES	on	2.343	-	2.833	-	+20.9%	5.272	5.674	P/P / - / P/P	- / 0
2f7cbe2e	minecraft-1.21.4-in-world	DirectGLES	off	2.369	2.732	2.867	+15.3%	+21.0%	5.281	5.752	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-in-world	DirectVulkan	on	1.034	-	1.148	-	+11.0%	2.304	2.405	P/P / - / P/P	- / 0
2f7cbe2e	minecraft-1.21.4-in-world	DirectVulkan	off	1.028	1.147	1.145	+11.6%	+11.4%	2.270	2.419	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	on	8.315	-	11.223	-	+35.0%	21.901	24.904	P/P / - / P/P	- / 0
2f7cbe2e	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	off	8.210	10.798	11.182	+31.5%	+36.2%	21.778	24.804	P/P / P/P / P/P	0 / 0
2f7cbe2e	minecraft-1.21.4-rd12-odinlite-in-world	DirectVulkan	on	-	-	-	-	-	-	-	P/P / - / P/P	- / None
2f7cbe2e	minecraft-1.21.4-rd12-odinlite-in-world	DirectVulkan	off	-	-	-	-	-	-	-	P/P / P/P / P/P	None / None

d P3a-boundary = push(0x1ff) vs pull; d P4a total = push(0x1fff) vs pull; the P4a-only share is the difference of the two. A '-' p50 means the run produced no result (rc != 0); see the runner.log in that directory.

3.4 KiB Raw Blame History

P4a device A/B - per-thread CPU per frame (ms), best-of-3 repeat, trailing window

3.4 KiB

Raw Blame History