ppsspp

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Henrik RydgårdandClaude Opus 5.5 f26ca37dad Threads: Context switches cost what they do on hardware

Timed on a PSP, each way of handing the CPU to another thread (the call
and the switch together):

                                     hardware   before   now
  rotate to an equal thread              7        14       7
  signal, better thread runs            10        17      10
  it waits again, back to caller        10        19      12
  wakeup, better thread runs             8        13       6
  it sleeps again, back to caller        7        12       6
  start a better thread, entry          30        28      30
  thread ends, back to its waiter       21        13      20
  notify, better thread's callback      14        13      14

A switch between two threads now costs 1150 cycles instead of 2700.
Starting a better thread costs 2000 cycles more, ending a thread 3300,
and setting up a callback 1800.

Also splits a wait timeout's ~30us into the deadline being taken 12us
into the call and the timeout going off 18us after it. That only changes
the time left written back, which threads/semaphores/wait and
threads/fpl/cancel pin between them. intr/vblank is re-recorded so it
no longer depends on the phase of the frame.

threads/callbacks/combos now passes.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

2026-09-30 09:06:30 -06:00

__sceAudio.cpp

Audio: Don't emulate a failed blocking wait leaving the channel busy for good

2026-09-29 09:19:32 -06:00

__sceAudio.h

sceAudio: implement sceAudioOneshotOutput, and cover the rest of the channel rules

2026-09-10 17:03:07 -06:00

AtracBase.h

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

AtracCtx2.cpp

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

AtracCtx2.h

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

AtracCtx.cpp

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

AtracCtx.h

Reimplement AA3 header parsing

2025-07-22 17:48:20 +02:00

ErrorCodes.h

sceAudiocodec: Match hardware setup, framing, errors and timing; fix Atrac3 polarity

2026-09-28 16:57:41 -06:00

FunctionWrappers.h

sceAudio: implement sceAudioOneshotOutput, and cover the rest of the channel rules

2026-09-10 17:03:07 -06:00

HLE.cpp

HLE: Resolve imports of states from before HLE v3 with the flags of then

2026-09-28 11:32:07 -06:00

HLE.h

Headless: refuse a run that can't honour an explicit --disable-hle

2026-09-20 16:39:35 -06:00

HLEHelperThread.cpp

Make instruction cache invalidation (for us, jit cache invalidation) clearer

2026-08-16 16:59:52 +02:00

HLEHelperThread.h

Make instruction cache invalidation (for us, jit cache invalidation) clearer

2026-08-16 16:59:52 +02:00

HLETables.cpp

KDebugForKernel: implement Kprintf

2026-09-18 16:26:41 -06:00

HLETables.h

…

HLEUtil.h

More manual Read_U32 cleanup

2026-08-11 10:28:36 +02:00

KernelThreadDebugInterface.h

Win32 debugger: stop cutting off register values in CtrlRegisterList

2026-09-12 13:46:12 -06:00

KernelWaitHelpers.h

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

KUBridge.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

KUBridge.h

…

NetAdhocCommon.cpp

Adhoc: Stop waiting for a login that has already failed

2026-09-29 12:37:48 -06:00

NetAdhocCommon.h

Adhoc: Stop waiting for a login that has already failed

2026-09-29 12:37:48 -06:00

NetInetConstants.cpp

Windows: Avoid POSIX error codes leaking into our WSA socket error codes

2026-08-10 10:04:21 +02:00

NetInetConstants.h

More error code cleanup

2025-08-06 17:44:54 +02:00

Plugins.cpp

When loading plugins, show the plugin name, not the filename.

2026-05-02 11:07:34 +02:00

Plugins.h

Run module_start of plugins before starting boot module

2025-06-13 23:29:49 +02:00

proAdhoc.cpp

Adhoc: Stop waiting for a login that has already failed

2026-09-29 12:37:48 -06:00

proAdhoc.h

Chat: keep more lines of history, and add timestamps

2026-09-04 13:10:54 -06:00

proAdhocServer.cpp

Adhoc: Fix shutdown hanging when it comes right after adhoc init

2026-09-29 11:58:42 -06:00

proAdhocServer.h

…

PSPThreadContext.h

…

ReplaceTables.cpp

Carry "this is video" across block copies

2026-09-22 16:10:28 -06:00

ReplaceTables.h

Jit: Remove the Jal-to-replacement optimization (really not all that benificial)

2026-02-17 09:40:27 +01:00

sceAac.cpp

Savestate: Reset what older states lack instead of keeping pre-load values

2026-09-28 11:32:07 -06:00

sceAac.h

Show sceAac contexts in ImDebugger

2025-07-20 19:30:35 +02:00

sceAdler.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceAdler.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceAtrac.cpp

sceAtrac: Charge ME time when SetData's first frame doesn't decode

2026-09-29 17:14:03 -06:00

sceAtrac.h

Atrac: Rework the header dependencies

2025-06-25 11:34:07 +02:00

sceAudio.cpp

Audio: Don't emulate a failed blocking wait leaving the channel busy for good

2026-09-29 09:19:32 -06:00

sceAudio.h

Audio: Don't emulate a failed blocking wait leaving the channel busy for good

2026-09-29 09:19:32 -06:00

sceAudiocodec.cpp

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

sceAudiocodec.h

Atrac3: Set up the decoder the way libatrac3plus does

2026-09-29 17:14:00 -06:00

sceAudioRouting.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceAudioRouting.h

…

sceCcc.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceCcc.h

…

sceChkreg.cpp

Apply proper names to some more HLE functions

2026-08-24 17:37:39 +02:00

sceChkreg.h

Implement or stub assorted functions the VSH is calling

2026-08-21 10:56:06 +02:00

sceChnnlsv.cpp

Savedata: Keep the IO thread out of the dialog's state

2026-09-25 12:50:39 -06:00

sceChnnlsv.h

Remove global state from kirk engine

2025-06-05 22:46:24 +02:00

sceCtrl.cpp

sceCtrl: Add the 3.71 sceCtrl_driver NID for sceCtrlPeekBufferPositive

2026-09-29 12:40:59 -06:00

sceCtrl.h

Add a VSH-only allowlist for real-loading flash0 modules, sceVshCommonUtil stub and sceVshBridge

2026-08-24 10:58:34 +02:00

sceDeflt.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceDeflt.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceDisplay.cpp

sceDisplay: Vblank lasts 770us, not 731.5us

2026-09-29 09:19:32 -06:00

sceDisplay.h

Debugger: add game.speed.get/set for fast-forward and a speed percentage

2026-08-18 13:42:13 +02:00

sceDmac.cpp

Carry "this is video" across block copies

2026-09-22 16:10:28 -06:00

sceDmac.h

…

sceFont.cpp

Savestate: Reset what older states lack instead of keeping pre-load values

2026-09-28 11:32:07 -06:00

sceFont.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceG729.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceG729.h

…

sceGameUpdate.cpp

Expose sceMpeg context to a future debugger window. Some general log cleanup.

2025-04-03 22:39:14 +02:00

sceGameUpdate.h

…

sceGe.cpp

De-claude some commments.

2026-09-21 16:50:22 -06:00

sceGe.h

De-claude some commments.

2026-09-21 16:50:22 -06:00

sceHeap.cpp

Savestate: Bounds-check sizes from the file, and plug leaks on load

2026-09-28 09:34:06 -06:00

sceHeap.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceHprm.cpp

Boot the VSH on every firmware, 1.50 through 6.61

2026-09-09 14:43:39 -06:00

sceHprm.h

HLE: implement assorted stubs and minor functionality

2026-08-19 18:38:03 +02:00

sceHttp.cpp

Logging cleanups in sceHttp/sceHttps

2026-09-25 12:38:40 -06:00

sceHttp.h

Allow passing in a custom resolver to HTTPRequest and Connection. This inverts the bad dependency.

2025-08-06 00:16:34 +02:00

sceImpose.cpp

Savestate: Reset what older states lack instead of keeping pre-load values

2026-09-28 11:32:07 -06:00

sceImpose.h

HLE: implement assorted stubs and minor functionality

2026-08-19 18:38:03 +02:00

sceIo.cpp

sceIo: host0: behaves like usbhostfs with dispatch suspended

2026-09-29 11:09:47 -06:00

sceIo.h

sceKernelLoadModule: Charge for reading the file and loading it

2026-09-29 11:09:47 -06:00

sceJpeg.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceJpeg.h

…

sceKernel.cpp

Savestate: Save sceDmac and sceUsbCam, which were never called, and NpDrm

2026-09-28 11:32:07 -06:00

sceKernel.h

Extend LoadExecForKernel with real VSH loadexec/exit syscalls

2026-08-24 10:58:34 +02:00

sceKernelAlarm.cpp

Alarms: Setting one takes ~40us, and it can't go off within ~215us

2026-09-30 09:06:30 -06:00

sceKernelAlarm.h

…

sceKernelEventFlag.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelEventFlag.h

Expose EventFlag/Mutex/Semaphore/MsgPipe/Callback in their headers

2026-08-17 16:01:23 +02:00

sceKernelHeap.cpp

Savestate: Fix loading kernel heaps and pre-exit-callback states

2026-09-28 09:34:05 -06:00

sceKernelHeap.h

Savestate: Fix loading kernel heaps and pre-exit-callback states

2026-09-28 09:34:05 -06:00

sceKernelInterrupt.cpp

Interrupts: Interrupt 8 has no handler on 6.61

2026-09-29 09:19:32 -06:00

sceKernelInterrupt.h

GPU: empty the display list queue on sceKernelLoadExec, fixes Crazy Taxi

2026-09-21 13:10:02 -06:00

sceKernelMbx.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelMbx.h

…

sceKernelMemory.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelMemory.h

_sceKernelAllocateTlspl: Check user pointers, support the timeout

2026-09-25 10:05:07 -06:00

sceKernelModule.cpp

sceKernelLoadModule: Charge for reading the file and loading it

2026-09-29 11:09:47 -06:00

sceKernelModule.h

Unload the firmware modules we swap in, when the game unloads the library

2026-09-21 14:37:10 -06:00

sceKernelMsgPipe.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelMsgPipe.h

Expose EventFlag/Mutex/Semaphore/MsgPipe/Callback in their headers

2026-08-17 16:01:23 +02:00

sceKernelMutex.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelMutex.h

Expose EventFlag/Mutex/Semaphore/MsgPipe/Callback in their headers

2026-08-17 16:01:23 +02:00

sceKernelSemaphore.cpp

Threads: Wait timeouts work like hardware's, one rule for all of them

2026-09-30 09:06:30 -06:00

sceKernelSemaphore.h

libkirk: let C++ callers include its headers directly

2026-09-08 11:15:15 -06:00

sceKernelThread.cpp

Threads: Context switches cost what they do on hardware

2026-09-30 09:06:30 -06:00

sceKernelThread.h

Threads: Context switches cost what they do on hardware

2026-09-30 09:06:30 -06:00

sceKernelTime.cpp

Reschedule on IO completion, drop the reschedule in time queries

2026-09-29 09:19:32 -06:00

sceKernelTime.h

…

sceKernelVTimer.cpp

Back out some excessive checking in the latest changes. Change TOOD: to TODO: .

2026-08-11 22:27:44 +02:00

sceKernelVTimer.h

…

sceMd5.cpp

Keep the SHA-1 context in game memory too, and scope the Tlspl partition range to user mode

2026-09-08 15:18:02 -06:00

sceMd5.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceMp3.cpp

Savestate: Reset what older states lack instead of keeping pre-load values

2026-09-28 11:32:07 -06:00

sceMp3.h

Rename mp3Map to g_mp3Map

2025-07-20 19:32:05 +02:00

sceMp4.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceMp4.h

…

sceMpeg.cpp

Savestate: Save state that was missing from several modules

2026-09-28 11:32:07 -06:00

sceMpeg.h

sceMpegbase: implement the colour conversion functions

2026-09-12 11:52:09 -06:00

sceMpegbase.cpp

Model the movie blit by texture format, location and width; scale costs with the clock

2026-09-25 16:40:11 -06:00

sceMpegbase.h

Give the Media Engine an address space instead of a table of packets

2026-09-20 16:39:35 -06:00

sceMt19937.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceMt19937.h

HLE: graduate the leaf libraries games carry on the disc

2026-09-11 21:09:33 -06:00

sceNet_lib.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceNet_lib.h

…

sceNet.cpp

Savestate: Save state that was missing from several modules

2026-09-28 11:32:07 -06:00

sceNet.h

Netconf: Report success, and don't get stuck without a way out

2026-09-25 12:50:41 -06:00

sceNetAdhoc.cpp

Adhoc: Stop waiting for a login that has already failed

2026-09-29 12:37:48 -06:00

sceNetAdhoc.h

Add the ability to hide adhoc servers using a "hidden" entry in the json.

2026-04-23 11:12:58 +02:00

sceNetAdhocMatching.cpp

Savestate: Keep pending adhocctl requests, so a waiting Init survives a load

2026-09-28 09:34:06 -06:00

sceNetAdhocMatching.h

8 vars moved to NetAdhocCommon, 1 var moved to sceNetAdhocMatching

2025-07-01 19:56:09 +03:00

sceNetApctl.cpp

…

sceNetApctl.h

…

sceNetInet.cpp

Add some new function names that were cracked from NIDs by zecoxao

2026-09-10 15:52:53 -06:00

sceNetInet.h

…

sceNetResolver.cpp

More memory access cleanup

2026-08-11 20:14:01 +02:00

sceNetResolver.h

sceNetResolver: Move error codes to enum, modernize logging

2025-04-07 22:16:32 +02:00

sceNp2.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceNp2.h

…

sceNp.cpp

Rename the get-memory-pointer functions to make it clear where CPU exceptions can happen.

2026-08-12 14:06:16 +02:00

sceNp.h

…

sceOpenPSID.cpp

Rename some module-related functions to include HLE where appropriate

2025-03-31 11:17:50 +02:00

sceOpenPSID.h

…

sceP3da.cpp