time: Remove delay execution

* Causes high cpu usage in Tohou Luna Nights

src/core/libraries/kernel/threads/condvar.cpp

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cstring>
-#include <unordered_map>
 #include "common/assert.h"
 #include "core/libraries/error_codes.h"
 #include "core/libraries/kernel/kernel.h"

src/core/libraries/kernel/threads/mutex.cpp

@@ -191,13 +191,6 @@ int PthreadMutex::Lock(const OrbisKernelTimespec* abstime, u64 usec) {
         return SelfLock(abstime, usec);
     }
 
-    int ret = 0;
-    SCOPE_EXIT {
-        if (ret == 0) {
-            curthread->Enqueue(this);
-        }
-    };
-
     /*
      * For adaptive mutexes, spin for a bit in the expectation
      * that if the application requests this mutex type then
@@ -208,6 +201,7 @@ int PthreadMutex::Lock(const OrbisKernelTimespec* abstime, u64 usec) {
         int count = m_spinloops;
         while (count--) {
             if (m_lock.try_lock()) {
+                m_owner = curthread;
                 return 0;
             }
             CPU_SPINWAIT;
@@ -217,11 +211,13 @@ int PthreadMutex::Lock(const OrbisKernelTimespec* abstime, u64 usec) {
         while (count--) {
             std::this_thread::yield();
             if (m_lock.try_lock()) {
+                m_owner = curthread;
                 return 0;
             }
         }
     }
-
+    
+    int ret = 0;
     if (abstime == nullptr) {
         m_lock.lock();
     } else if (abstime != THR_RELTIME && (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000))
@@ -234,6 +230,9 @@ int PthreadMutex::Lock(const OrbisKernelTimespec* abstime, u64 usec) {
             ret = m_lock.try_lock_until(abstime->TimePoint()) ? 0 : POSIX_ETIMEDOUT;
         }
     }
+    if (ret == 0) {
+        m_owner = curthread;
+    }
     return ret;
 }
 
@@ -244,7 +243,7 @@ int PthreadMutex::TryLock() {
     }
     const int ret = m_lock.try_lock() ? 0 : POSIX_EBUSY;
     if (ret == 0) {
-        curthread->Enqueue(this);
+        m_owner = curthread;
     }
     return ret;
 }
@@ -286,7 +285,7 @@ int PthreadMutex::Unlock() {
         int defered = True(m_flags & PthreadMutexFlags::Defered);
         m_flags &= ~PthreadMutexFlags::Defered;
 
-        curthread->Dequeue(this);
+        m_owner = nullptr;
         m_lock.unlock();
 
         if (curthread->will_sleep == 0 && defered) {

src/core/libraries/kernel/threads/pthread.h

@@ -274,8 +274,6 @@ struct Pthread {
     Pthread* joiner;
     ThreadFlags flags;
     ThreadListFlags tlflags;
-    std::list<PthreadMutex> mutexq;
-    std::list<PthreadMutex> pp_mutexq;
     void* ret;
     PthreadSpecificElem* specific;
     int specific_data_count;
@@ -330,16 +328,6 @@ struct Pthread {
             return true;
         }
     }
-
-    void Enqueue(PthreadMutex* mutex) {
-        mutex->m_owner = this;
-        // mutexq.push_back(*mutex);
-    }
-
-    void Dequeue(PthreadMutex* mutex) {
-        mutex->m_owner = nullptr;
-        // mutexq.erase(decltype(mutexq)::s_iterator_to(*mutex));
-    }
 };
 using PthreadT = Pthread*;
 

src/core/libraries/kernel/time.cpp

@@ -52,14 +52,7 @@ u64 PS4_SYSV_ABI sceKernelReadTsc() {
 
 int PS4_SYSV_ABI sceKernelUsleep(u32 microseconds) {
 #ifdef _WIN64
-    if (microseconds < 1000u) {
-        LARGE_INTEGER interval{
-            .QuadPart = -1 * (microseconds * 10u),
-        };
-        NtDelayExecution(FALSE, &interval);
-    } else {
-        std::this_thread::sleep_for(std::chrono::microseconds(microseconds));
-    }
+    std::this_thread::sleep_for(std::chrono::microseconds(microseconds));
     return 0;
 #else
     timespec start;