Plexi09/eden-miror
1
0
Fork 0
mirror of https://git.eden-emu.dev/eden-emu/eden synced 2026-05-27 23:47:03 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

OH FUCK THE TIMINGS

Browse source
This commit is contained in:
lizzie 2026-05-24 04:55:42 +00:00
parent 94a34999a8
commit 46f799c9c8
1 changed files with 13 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/common/thread.cpp
View file

@ -183,7 +183,9 @@ bool Event::WaitFor(const std::chrono::nanoseconds time) {
_mm_monitorx(reinterpret_cast<u64*>(std::addressof(is_set)), 0, 0); _mm_monitorx(reinterpret_cast<u64*>(std::addressof(is_set)), 0, 0);
if (!is_set.load()) { if (!is_set.load()) {
// RDTSC may be fenced here due to atomic load // RDTSC may be fenced here due to atomic load
u32 const cycles = std::min<u32>(std::numeric_limits<u32>::max(), s64(end) - s64(start)); auto const now = _rdtsc();
if (end > now) {
u32 const cycles = std::min<u32>(std::numeric_limits<u32>::max(), s64(end) - s64(now));
// See here: https://github.com/torvalds/linux/blob/948a64995aca6820abefd17f1a4258f5835c5ad9/arch/x86/lib/delay.c#L93 // See here: https://github.com/torvalds/linux/blob/948a64995aca6820abefd17f1a4258f5835c5ad9/arch/x86/lib/delay.c#L93
// MWAITX accepts a 32-bit input timer which determines the total number of cycles to wait for // MWAITX accepts a 32-bit input timer which determines the total number of cycles to wait for
// NOT THE TOTAL ABSOLUTE TSC VALUE, it's just a delta // NOT THE TOTAL ABSOLUTE TSC VALUE, it's just a delta
@ -192,6 +194,8 @@ bool Event::WaitFor(const std::chrono::nanoseconds time) {
_mm_mwaitx(1 << 1, 0u, cycles); _mm_mwaitx(1 << 1, 0u, cycles);
if (!is_set.load()) if (!is_set.load())
return false; return false;
} else
return false; //timeout
} }
bool expected = true; bool expected = true;
if (is_set.compare_exchange_weak(expected, false, std::memory_order_release)) if (is_set.compare_exchange_weak(expected, false, std::memory_order_release))