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utils: Scale busy_wait according to arm timer frequency
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> - This is a fatal issue that was impacting arm builds, since busy_waits were written assuming an approx 3Ghz x86 machine
> and most arm machines have a hardware timer that runs south of 100mhz, meaning the top items in the profiler were calls to busy_wait();
> all over the code. Fixing this is a very significant speedup, on my snapdragon 8 gen 2 device. 27->37FPS in Metal Gear Rising, but almost
> all games benefit when run on ARM.
This commit is contained in:
Malcolm 2026-01-15 04:20:25 +00:00 • committed by Elad
parent 760c35eec8
commit 0f85e9123e
2 changed files with 32 additions and 2 deletions
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5
rpcs3/rpcs3.cpp
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@ -26,6 +26,7 @@
#include "Utilities/sema.h"
#include "Utilities/date_time.h"
#include "util/console.h"
#include "util/asm.hpp"
#include "Crypto/decrypt_binaries.h"
#ifdef _WIN32
#include "module_verifier.hpp"
@ -681,6 +682,10 @@ int run_rpcs3(int argc, char** argv)
logs::set_init({std::move(ver), std::move(sys), std::move(os), std::move(qt), std::move(time)});
}
#ifdef ARCH_ARM64
utils::init_arm_timer_scale();
#endif
#ifdef _WIN32
sys_log.notice("Initialization times before main(): %fGc", intro_cycles / 1000000000.);
#elif defined(RUSAGE_THREAD)