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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.
1.8 KiB
1.8 KiB
DriverBench (desktop, lavapipe/llvmpipe) - median ns_per_op over repeats
| arm | mc_vanilla_draw | mc_state_toggle | mc_pass_switch |
|---|---|---|---|
| native | 4771.3 (n=5, min 4744.7) | 22968.3 (n=5, min 22532.9) | 437758.9 (n=5, min 436480.1) |
| espryt-pull | 5120.7 (n=5, min 5072.3) | 23752.8 (n=5, min 23216.3) | 443300.2 (n=5, min 440425.2) |
| espryt-push | 5442.9 (n=5, min 5396.3) | 24869.1 (n=5, min 24724.6) | 446016.5 (n=5, min 443312.2) |
| espryt-push0 | 5671.2 (n=5, min 5656.1) | 24583.8 (n=5, min 24078.7) | 443806.9 (n=5, min 438585.2) |
| espryt-nocso | 5374.2 (n=5, min 5345.5) | 24630.0 (n=5, min 24395.1) | 435453.6 (n=5, min 434007.7) |
| magma-pull | 16899.6 (n=5, min 16814.4) | 32704.5 (n=5, min 32330.1) | 438405.7 (n=5, min 435954.5) |
| magma-push | 17244.5 (n=5, min 17051.8) | 33857.4 (n=5, min 33629.6) | 446066.5 (n=5, min 439141.4) |
| magma-push0 | 17598.6 (n=5, min 17427.3) | 34081.9 (n=5, min 33269.3) | 445006.0 (n=5, min 443467.1) |
| magma-nocso | 17444.2 (n=5, min 17353.3) | 34779.6 (n=5, min 34306.0) | 444758.0 (n=5, min 444413.2) |
Deltas on mc_vanilla_draw (ns/draw)
- espryt: T1 = push - pull = +322.2; T2 = push(PIPE_PUSH=0) - pull = +550.5; T1 - T2 (what P2 added) = -228.3; no-CSO-content-addressing - push = -68.7
- magma: T1 = push - pull = +344.9; T2 = push(PIPE_PUSH=0) - pull = +699.0; T1 - T2 (what P2 added) = -354.1; no-CSO-content-addressing - push = +199.7
Blaze3D blend toggle (mc_state_toggle, ns per toggle pair) and pass switch
- espryt mc_state_toggle: pull 23752.8, push 24869.1, delta +1116.3, native 22968.3
- espryt mc_pass_switch: pull 443300.2, push 446016.5, delta +2716.3, native 437758.9
- magma mc_state_toggle: pull 32704.5, push 33857.4, delta +1152.9, native 22968.3
- magma mc_pass_switch: pull 438405.7, push 446066.5, delta +7660.8, native 437758.9