de21c7a544
The silph title state machine (tid13) blocked on event 0x10a0, never signaled. Root: the event's producer chain runs on the silph worker (entry 0x821C4AD0, our tid14), which was starved. tid14 shares a HW slot with a guest spinlock/ barrier participant (sub_824D1328, entry 0x824D2940) that busy-spins on the db16cyc hint `or r31,r31,r31` (encoding 0x7FFFFB78) at 0x824D140C. Under our round-robin lockstep the spinner consumed its whole block every round and starved the co-located tid14 (only 9 progress hits over 200M instr) — so the producer never reached the event-create/duplicate/signal dance the canary oracle performs (handle F80000E8 set by the submitter F8000044 via a duplicated handle). Fix (canary-faithful): recognize the db16cyc spin hint exactly as canary's InstrEmit_orx does (code 0x7FFFFB78 -> DelayExecution) and surface it as a new StepResult::Yield. The scheduler's yield_current() promotes every Ready peer on the slot past STARVE_LIMIT so begin_slot_visit picks one next round, then they reset and the spinner reclaims the slot — fair alternation, no priority inversion, pure function of slot state (deterministic). Result (lockstep, cache-persist, -n 200M): tid14 progresses past its old stall into a real wait; tid13 advances off 0x10a0 to a new event; hub/submitter re-enter their wait loops. imports 280k->592k, packets 124M->164M, swaps 1->2. draws still 0 (the splash's first draw is a further-upstream gate). Determinism preserved (two cold n50m runs byte-identical). n50m golden re-baselined (imports 90296->339766, swaps 1->2; draws unchanged 0). n2m golden unchanged (db16cyc not reached in first 2M). Tests 670/670. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
81 lines
2.7 KiB
Plaintext
81 lines
2.7 KiB
Plaintext
0x82451238: mflr r12
|
|
0x8245123c: li r0, 0
|
|
0x82451240: stw r0, 4(r1)
|
|
0x82451244: bl 0x825F0F80
|
|
0x82451248: subi r31, r1, 160
|
|
0x8245124c: stwu r1, -160(r1)
|
|
0x82451250: mr r30, r4
|
|
0x82451254: li r9, 1
|
|
0x82451258: lwz r10, 32(r30)
|
|
0x8245125c: stw r30, 188(r31)
|
|
0x82451260: stw r9, 8(r30)
|
|
0x82451264: cmplwi cr6, r10, 0x0
|
|
0x82451268: beq cr6, 0x82451288
|
|
0x8245126c: lwz r11, 4(r30)
|
|
0x82451270: lwz r8, 4(r10)
|
|
0x82451274: cmplw cr6, r11, r8
|
|
0x82451278: bne cr6, 0x82451288
|
|
0x8245127c: mr r11, r9
|
|
0x82451280: li r26, 0
|
|
0x82451284: b 0x82451290
|
|
0x82451288: li r26, 0
|
|
0x8245128c: mr r11, r26
|
|
0x82451290: clrlwi r11, r11, 24
|
|
0x82451294: cmplwi cr6, r11, 0x0
|
|
0x82451298: beq cr6, 0x824512A0
|
|
0x8245129c: stw r9, 8(r10)
|
|
0x824512a0: lwz r3, 36(r30)
|
|
0x824512a4: lwz r11, 0(r3)
|
|
0x824512a8: lwz r11, 32(r11)
|
|
0x824512ac: mtctr r11
|
|
0x824512b0: bctrl
|
|
0x824512b4: mr r27, r3
|
|
0x824512b8: stw r26, 84(r31)
|
|
0x824512bc: stw r27, 96(r31)
|
|
0x824512c0: bl 0x82454498
|
|
0x824512c4: addi r4, r31, 84
|
|
0x824512c8: bl 0x82454580
|
|
0x824512cc: stw r26, 92(r31)
|
|
0x824512d0: addi r11, r27, 2047
|
|
0x824512d4: lis r10, 0x2
|
|
0x824512d8: clrrwi r11, r11, 11
|
|
0x824512dc: cmplw cr6, r11, r10
|
|
0x824512e0: stw r11, 100(r31)
|
|
0x824512e4: ble cr6, 0x824512F4
|
|
0x824512e8: lis r11, 0x8207
|
|
0x824512ec: addi r11, r11, 6724
|
|
0x824512f0: b 0x824512F8
|
|
0x824512f4: addi r11, r31, 100
|
|
0x824512f8: addi r3, r31, 84
|
|
0x824512fc: lwz r4, 0(r11)
|
|
0x82451300: bl 0x82454B08
|
|
0x82451304: mr r8, r8
|
|
0x82451308: mr r28, r3
|
|
0x8245130c: stw r28, 92(r31)
|
|
0x82451310: b 0x82451324
|
|
0x82451314: lwz r30, 188(r31)
|
|
0x82451318: lwz r27, 96(r31)
|
|
0x8245131c: li r26, 0
|
|
0x82451320: lwz r28, 92(r31)
|
|
0x82451324: addi r3, r31, 84
|
|
0x82451328: bl 0x82454AA0
|
|
0x8245132c: mr r29, r3
|
|
0x82451330: cmplwi cr6, r28, 0x0
|
|
0x82451334: beq cr6, 0x82451684
|
|
0x82451338: lwz r3, 36(r30)
|
|
0x8245133c: li r8, 0
|
|
0x82451340: addi r7, r31, 88
|
|
0x82451344: mr r6, r29
|
|
0x82451348: mr r5, r29
|
|
0x8245134c: mr r4, r28
|
|
0x82451350: lwz r11, 0(r3)
|
|
0x82451354: lwz r11, 28(r11)
|
|
0x82451358: mtctr r11
|
|
0x8245135c: bctrl
|
|
0x82451360: clrlwi r11, r3, 24
|
|
0x82451364: cmplwi cr6, r11, 0x0
|
|
0x82451368: beq cr6, 0x82451684
|
|
0x8245136c: lwz r11, 28(r30)
|
|
0x82451370: rlwinm r11, r11, 0, 28, 28
|
|
0x82451374: cmplwi cr6, r11, 0x0
|