mirrors/shadPS4
1
0
Fork 0
mirror of https://github.com/shadps4-emu/shadPS4.git synced 2025-08-04 00:13:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

sceKernelGettimeofday: replace chrono by win32 api. Better performance

Browse Source 
bb uses this function too much. Consuming almost 30% of cpu time
This commit is contained in:
Vinicius Rangel 2024-09-21 22:13:10 -03:00
parent 5b7ee037ac
commit ed563e5717
No known key found for this signature in database
GPG Key ID: A5B154D904B761D9
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/core/libraries/kernel/time_management.cpp
View File

@ -147,13 +147,20 @@ int PS4_SYSV_ABI sceKernelGettimeofday(OrbisKernelTimeval* tp) {
} }
#ifdef _WIN64 #ifdef _WIN64
auto now = std::chrono::system_clock::now(); FILETIME filetime;
auto duration = now.time_since_epoch(); GetSystemTimeAsFileTime(&filetime);
auto seconds = std::chrono::duration_cast<std::chrono::seconds>(duration);
auto microsecs = std::chrono::duration_cast<std::chrono::microseconds>(duration - seconds);
tp->tv_sec = seconds.count(); constexpr u64 UNIX_TIME_START = 0x295E9648864000;
tp->tv_usec = microsecs.count(); constexpr u64 TICKS_PER_SECOND = 1000000;
u64 ticks = filetime.dwHighDateTime;
ticks <<= 32;
ticks |= filetime.dwLowDateTime;
ticks /= 10;
ticks -= UNIX_TIME_START;
tp->tv_sec = ticks / TICKS_PER_SECOND;
tp->tv_usec = ticks % TICKS_PER_SECOND;
#else #else
timeval tv; timeval tv;
gettimeofday(&tv, nullptr); gettimeofday(&tv, nullptr);