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param.json: ask the kernel for 1 GiB of flexible memory
sce_sys/param.json now carries kernel.flexibleMemorySize = 1073741824, the most the kernel accepts. Without it the title has 448 MiB of flexible memory; the extra 576 MiB comes out of direct memory. I want the room for heavier cores and content, though no core measured today ran short. The updater installs sce_sys/param.json, so the next release brings it. Proven on the PS5 Pro (firmware 10.01) with the installed release, build 716a3c05, four runs (evidence/flexible-memory-1g). The 1 GiB runs used this commit's param.json bytes, put back and read back after each run: - klog FMEM size 0x1c000000 -> 0x40000000, DMEM size 0x300000000 -> 0x2dc000000. - Dolphin, a GameCube game: 359,424 -> 949,248 KiB of flexible memory free, flat all run; MARK frames 2266 / 2303 at 70 s. - The PS2 core, a PS2 game: 402,432 -> 992,256 KiB free; MARK frames 4606 / 4606 at 80 s, worst frame 20.6 / 19.4 ms. - Every run stopped by its pad script, rarch_main returned 0. Not yet run on the base PS5 (13.40), which was unreachable. tools/lint.sh's param.json checks pass; the script still fails, before and after, on a clang-tidy entry for tests/display_modes_ps5_test.cpp.
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@@ -0,0 +1,73 @@
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{
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"step": "flexible-memory-1g",
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"recorded": "2026-10-05T16:15:59Z",
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"console_run": "PS5 Pro, firmware 10.01, 2026-10-05: four runs of the installed release, PPSA99169",
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"revision": "release build 716a3c05 on the console; sce_sys/param.json of e4a2e49 plus the kernel block",
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"command": "python3 klog/flexible-memory-1g-20261005/ab.py gc|ps2 base|1g (a scratch driver: idle check, test files, param.json swap and restore, launch, klog, trace)",
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"raw_capture": "klog/flexible-memory-1g-20261005/summary.txt",
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"raw_lines": 61,
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"raw_bytes": 5288,
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"lines": [
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"==> klog/flexible-memory-1g-20261005/ab.py <game> base|1g: the installed release (build 716a3c05), launched by the control payload with args.txt -L <core> <content>, ps5vk-profile.txt and a pad script (MARK every 10 s from 20 s, STOP at 92 s); 1g puts kernel.flexibleMemorySize = 1073741824 into /app0/sce_sys/param.json for the run, then restores the original and reads it back",
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"gc-base: a GameCube game (dolphin_libretro), param.json as committed (no kernel key)",
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"gc-base: klog FMEM size 0x1c000000 DMEM size 0x300000000; ended by itself at 101 s; param.json restored True",
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"gc-base: memory: event=startup result=0 request=0 known=1 pool=12884901888 free=12845056000 largest=12845056000 ranges=1 flexible=419430400 cpu_heap=33554432 gpu=0 gpu_known=1",
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"gc-base: memory: flexible_free=359424 KiB",
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"gc-base: memory: platform exec=2/235MiB shm=1/64MiB views=23 ranges=1/14336MiB committed=0MiB",
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"gc-base: input: pad script MARK at 20.003 s: frames=768 worst_ms=1404.9 over_40ms=14",
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"gc-base: input: pad script MARK at 30.001 s: frames=1067 worst_ms=53.0 over_40ms=16",
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"gc-base: input: pad script MARK at 40.009 s: frames=1367 worst_ms=35.1 over_40ms=16",
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"gc-base: input: pad script MARK at 50.019 s: frames=1667 worst_ms=36.3 over_40ms=16",
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"gc-base: input: pad script MARK at 60.010 s: frames=1967 worst_ms=50.0 over_40ms=17",
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"gc-base: input: pad script MARK at 70.003 s: frames=2266 worst_ms=50.0 over_40ms=18",
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"gc-base: input: pad script MARK at 80.013 s: frames=2566 worst_ms=43.7 over_40ms=19",
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"gc-base: input: pad script STOP at 92.01 s",
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"gc-base: rarch_main returned = 0",
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"gc-base: native quit: frontend status = 0",
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"gc-1g: a GameCube game (dolphin_libretro), param.json with kernel.flexibleMemorySize 1073741824",
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"gc-1g: klog FMEM size 0x40000000 DMEM size 0x2dc000000; ended by itself at 101 s; param.json restored True",
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"gc-1g: memory: event=startup result=0 request=0 known=1 pool=12280922112 free=12241076224 largest=12241076224 ranges=1 flexible=1023410176 cpu_heap=33554432 gpu=0 gpu_known=1",
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"gc-1g: memory: flexible_free=949248 KiB",
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"gc-1g: memory: platform exec=2/235MiB shm=1/64MiB views=23 ranges=1/14336MiB committed=0MiB",
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"gc-1g: input: pad script MARK at 20.003 s: frames=805 worst_ms=1349.4 over_40ms=6",
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"gc-1g: input: pad script MARK at 30.011 s: frames=1105 worst_ms=49.9 over_40ms=7",
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"gc-1g: input: pad script MARK at 40.019 s: frames=1405 worst_ms=35.2 over_40ms=7",
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"gc-1g: input: pad script MARK at 50.010 s: frames=1705 worst_ms=36.3 over_40ms=7",
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"gc-1g: input: pad script MARK at 60.004 s: frames=2004 worst_ms=49.8 over_40ms=8",
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"gc-1g: input: pad script MARK at 70.000 s: frames=2303 worst_ms=50.1 over_40ms=9",
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"gc-1g: input: pad script MARK at 80.007 s: frames=2603 worst_ms=43.6 over_40ms=10",
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"gc-1g: input: pad script STOP at 92.00 s",
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"gc-1g: rarch_main returned = 0",
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"gc-1g: native quit: frontend status = 0",
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"ps2-base: a PS2 game (pcsx2_libretro), param.json as committed (no kernel key)",
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"ps2-base: klog FMEM size 0x1c000000 DMEM size 0x300000000; ended by itself at 101 s; param.json restored True",
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"ps2-base: memory: event=startup result=0 request=0 known=1 pool=12884901888 free=12845056000 largest=12845056000 ranges=1 flexible=419430400 cpu_heap=33554432 gpu=0 gpu_known=1",
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"ps2-base: memory: flexible_free=402432 KiB",
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"ps2-base: memory: platform exec=2/365MiB shm=2/324MiB views=12008 ranges=2/4112MiB committed=0MiB",
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"ps2-base: input: pad script MARK at 20.006 s: frames=1009 worst_ms=21.0 over_40ms=0",
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"ps2-base: input: pad script MARK at 30.016 s: frames=1609 worst_ms=19.7 over_40ms=0",
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"ps2-base: input: pad script MARK at 40.009 s: frames=2208 worst_ms=20.0 over_40ms=0",
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"ps2-base: input: pad script MARK at 50.002 s: frames=2807 worst_ms=19.7 over_40ms=0",
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"ps2-base: input: pad script MARK at 60.012 s: frames=3407 worst_ms=19.9 over_40ms=0",
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"ps2-base: input: pad script MARK at 70.006 s: frames=4006 worst_ms=20.4 over_40ms=0",
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"ps2-base: input: pad script MARK at 80.016 s: frames=4606 worst_ms=20.6 over_40ms=0",
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"ps2-base: input: pad script STOP at 92.01 s",
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"ps2-base: rarch_main returned = 0",
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"ps2-base: native quit: frontend status = 0",
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"ps2-1g: a PS2 game (pcsx2_libretro), param.json with kernel.flexibleMemorySize 1073741824",
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"ps2-1g: klog FMEM size 0x40000000 DMEM size 0x2dc000000; ended by itself at 98 s; param.json restored True",
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"ps2-1g: memory: event=startup result=0 request=0 known=1 pool=12280922112 free=12241076224 largest=12241076224 ranges=1 flexible=1023410176 cpu_heap=33554432 gpu=0 gpu_known=1",
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"ps2-1g: memory: flexible_free=992256 KiB",
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"ps2-1g: memory: platform exec=2/365MiB shm=2/324MiB views=12008 ranges=2/4112MiB committed=0MiB",
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"ps2-1g: input: pad script MARK at 20.015 s: frames=1010 worst_ms=21.0 over_40ms=0",
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"ps2-1g: input: pad script MARK at 30.008 s: frames=1609 worst_ms=20.8 over_40ms=0",
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"ps2-1g: input: pad script MARK at 40.002 s: frames=2208 worst_ms=20.1 over_40ms=0",
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"ps2-1g: input: pad script MARK at 50.012 s: frames=2808 worst_ms=19.8 over_40ms=0",
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"ps2-1g: input: pad script MARK at 60.005 s: frames=3407 worst_ms=20.1 over_40ms=0",
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"ps2-1g: input: pad script MARK at 70.015 s: frames=4007 worst_ms=20.1 over_40ms=0",
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"ps2-1g: input: pad script MARK at 80.008 s: frames=4606 worst_ms=19.4 over_40ms=0",
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"ps2-1g: input: pad script STOP at 92.00 s",
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"ps2-1g: rarch_main returned = 0",
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"ps2-1g: native quit: frontend status = 0"
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]
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}
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@@ -0,0 +1,22 @@
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{
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"step": "flexible-memory-1g",
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"note": "kernel.flexibleMemorySize = 1 GiB in param.json: the kernel gives the title 1 GiB of flexible memory (FMEM 0x40000000) and 576 MiB less direct memory (DMEM 0x2dc000000); Dolphin and the PS2 core keep their frame counts and end cleanly, with 2.6x and 2.5x the flexible memory free.",
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"must_contain": [
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"gc-1g: klog FMEM size 0x40000000 DMEM size 0x2dc000000",
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"ps2-1g: klog FMEM size 0x40000000 DMEM size 0x2dc000000",
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"gc-base: klog FMEM size 0x1c000000 DMEM size 0x300000000",
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"gc-1g: memory: flexible_free=949248 KiB",
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"gc-base: memory: flexible_free=359424 KiB",
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"ps2-1g: memory: flexible_free=992256 KiB",
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"ps2-base: memory: flexible_free=402432 KiB",
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"gc-1g: input: pad script MARK at 80.007 s: frames=2603",
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"ps2-1g: input: pad script MARK at 80.008 s: frames=4606 worst_ms=19.4 over_40ms=0",
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"ps2-1g: rarch_main returned = 0",
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"gc-1g: rarch_main returned = 0",
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"param.json restored True"
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],
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"must_not_contain": [
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"param.json restored False"
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],
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"human_check": "The 1g runs report FMEM 0x40000000 and about 2.6x the flexible memory free of the base runs, with the same MARK frame counts and a clean rarch_main return."
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}
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@@ -19,6 +19,9 @@
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}
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]
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},
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"kernel": {
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"flexibleMemorySize": 1073741824
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},
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"localizedParameters": {
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"defaultLanguage": "en-US",
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"en-US": {
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