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[core/core_timing] better MWAITX and WAITPKG delays (#3984)

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This implements MWAITX and WAITPKG extensions (umonitor, mwait) for CPUs that support them.

Reduces wait times and bypasses the timing stuff from the OS that is slow (windows notably). generally it should answer within 0.2 to 0.5 microsecs (since most requests wait for that long).

Also does a general rework of static ctors and stuff

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3984
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
This commit is contained in:
lizzie 2026-05-30 21:59:10 +02:00 • committed by crueter
parent ff7bbaea7d
commit 7c32cf03a1
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19 changed files with 477 additions and 533 deletions
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27
src/core/core_timing.h
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@ -19,7 +19,7 @@
#include "common/common_types.h"
#include "common/thread.h"
#include "common/wall_clock.h"
#include "common/cpu_features.h"
namespace Core::Timing {
@ -142,37 +142,28 @@ public:
void Reset();
Common::WallClock clock;
using heap_t = boost::heap::fibonacci_heap<CoreTiming::Event, boost::heap::compare<std::greater<>>>;
heap_t event_queue;
s64 global_timer = 0;
#ifdef _WIN32
s64 timer_resolution_ns;
#endif
using heap_t =
boost::heap::fibonacci_heap<CoreTiming::Event, boost::heap::compare<std::greater<>>>;
heap_t event_queue;
u64 event_fifo_id = 0;
s64 pause_end_time{};
/// Cycle timing
u64 cpu_ticks{};
s64 downcount{};
Common::Event event{};
Common::Event pause_event{};
std::function<void()> on_thread_init{};
std::jthread timer_thread;
mutable std::mutex basic_lock;
std::mutex advance_lock;
std::jthread timer_thread;
std::atomic<bool> paused{};
std::atomic<bool> paused_set{};
std::atomic<bool> wait_set{};
std::atomic<bool> has_started{};
std::function<void()> on_thread_init{};
bool is_multicore{};
s64 pause_end_time{};
/// Cycle timing
u64 cpu_ticks{};
s64 downcount{};
};
/// Creates a core timing event with the given name and callback.