The core and the headless tools no longer use mutexes, condition variables,
spinlocks, std::atomic, std::thread or volatile flags. Threads hand off through
libretro-common's retro_atomic and rthreads plus a few small pieces on top of
them in Common/Thread: Thread, MpscQueue, EventCounter, ParkingLot waits and
ReaderGate. Every wait blocks until it's woken; nothing polls on a timer.
State that only one thread touches just loses its lock. The PSP filesystem,
sceIo and the savedata dialog now belong to the emulation thread: async reads
and writes run when they're queued and complete later in emulated time, and
the IO and savedata threads are gone. The friend finder only talks to the
adhoc server and hands what it gets to the emulation thread. GPU init always
runs on the thread that starts the game.
The Vulkan render and compile queues, pipeline and render pass caches, delete
list and SPIR-V cache, the GL render queue, the software renderer's jit caches,
the file loader caches, the web debugger, UPnP, input, savestates, logging and
the GE debugger all hand off through queues and atomics. The IR jit's spinning
profiler thread goes.
A CPU thread with nothing to run now sleeps until work is queued instead of
spinning. Headless with --debugger waits for a client while stopped, and ends
the run once every client that connected has left. Web server shutdown keeps
servicing the CPU queue until the server has finished.
Reinitialize() wiped the 64 display lists but kept the queue of their ids.
Whatever the old executable still had queued came back as lists with no state
and a pc of 0, behind the first list of the new executable, where they
blocked everything. Crazy Taxi: Fare Wars is a launcher for its two games,
and stopped at a black screen that way. Fixes#19894.
This removes the workaround for it, which dropped such a list but returned
before currentList was cleared, and only worked as long as something else
happened to clear it later. A list with a bad pc is now dropped like one that
ran into an error, instead of sitting at the head of the queue for good.
Also narrows what sceGeBreak(1) throws away to interrupts that have actually
been raised, which is what gpu/ge/intrsuspend shows. The ones we haven't
raised yet are only late because we execute lists ahead of time: a game that
breaks right after its last list, and then waits for what the finish callback
signals, got that callback long ago on hardware.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Resetting the GE also gets rid of an interrupt that was raised but not taken
yet, so a list that reached its FINISH just before never gets its finish
callback. We delivered one anyway, for a list that no longer existed. If the
break comes from inside a GE callback, the interrupt being handled is kept,
since its handler still has to return.
Found by gpu/ge/intrsuspend, which also confirms from a thread, with
interrupts suspended, that nothing moves along the queue until the FINISH
interrupt has been taken.
Savestates: bump GPUCommon to 7. We didn't use to mark a PAUSE signal as
delivered, which sceGeContinue now goes by, so a state saved with a list
paused that way would load into a game that could never continue it. Fixed
up on load.
gpu/signals/handlercalls goes in as known failing: with an old SDK version, a
stall address set from inside a SUSPEND callback doesn't reach the GE, which
we can't express with just the one stall address per list. See docs/sceGe.md.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
On hardware the GE stops at every SIGNAL and FINISH, and it's the interrupt
that gets it going again: on the same list after a signal, on the next one
after a FINISH - once the finish callback has run, with the finished list
still at the head of the queue. We ran the next list right away and dropped
the finished one at once, so a finish callback saw an empty queue. A list
enqueued from there was started instead of queued, and then couldn't be
dequeued, which hung the new gpu/ge/queue2 test.
ProcessDLQueue() now runs nothing while the head of the queue has an
interrupt pending, and InterruptEnd() is what takes a finished list off the
queue. This also keeps a stall update from restarting a list that's stopped
at a signal before the handler has run. drawCompleteTicks is still set when
the last list reaches its FINISH, so a sceGeDrawSync in between doesn't wait.
Other things gpu/ge/queue2 and gpu/ge/breakwait showed, all from a real PSP:
- sceGeListEnQueue compares against the address a list was enqueued with
(or stopped at by sceGeBreak), mirrors included, not against its current pc.
We had that the wrong way around.
- The stack-in-use check only applies to lists that have started executing.
This is probably what IgnoreEnqueue was added for (Metal Gear Acid 2,
#10906). The flag stays until someone has checked the game without it.
- A PAUSE signal makes the list PAUSED at once, before the FINISH delivers it.
In between, sceGeContinue and sceGeBreak say BUSY, and updating the stall
address does nothing, so a list that stalls there is stuck.
- A completed list can't be dequeued, with or without a context.
- sceGeDrawSync(1) looked at currentList instead of the list it had found.
- sceGeBreak(1) doesn't wake anyone, and a late interrupt for a list it reset
no longer marks that list completed. Threads in sceGeDrawSync are woken
before the ones waiting for the last list.
Also fixes currentList being lost when loading a state where it's list 0,
and makes ge_pending_cb a plain std::list - nothing else touches it, and the
GPU thread it was shared with is long gone. Same savestate format.
See docs/sceGe.md.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* Rename LogType to Log
* Explicitly use the Log:: enum when logging. Allows for autocomplete when editing.
* Mac/ARM64 buildfix
* Do the same with the hle result log macros
* Rename the log names to mixed case while at it.
* iOS buildfix
* Qt buildfix attempt, ARM32 buildfix
The values read back when saving a context or getting matrix data are set
differently than the actual values used for rendering.
This implements the wrapping and bleeding between matrices within softgpu,
but leaves hardware rendering to only use the rendering registers for
speed.
May help #3407 and related errors, as well as crashes and execution of
garbage. This stops immediately on a bad pointer, rather than trying to
push through.
libretroadmin