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SPU: Use optimized PPU signaling to SPU on reservation pause

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This commit is contained in:
Eladash 2020-05-09 08:42:59 +03:00 committed by Ani
parent 525453794f
commit b38580bf32
2 changed files with 68 additions and 41 deletions
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85
rpcs3/Emu/CPU/CPUThread.cpp
View File

@ -466,6 +466,7 @@ bool cpu_thread::check_state() noexcept
bool cpu_sleep_called = false;
bool cpu_flag_memory = false;
bool escape, retval;
if (!(state & cpu_flag::wait))
{
@ -474,54 +475,73 @@ bool cpu_thread::check_state() noexcept
while (true)
{
if (state & cpu_flag::memory)
// Process all flags in a single atomic op
const auto state0 = state.fetch_op([&](bs_t<cpu_flag>& flags)
{
if (auto& ptr = vm::g_tls_locked)
bool store = false;
if (flags & cpu_flag::signal)
{
ptr->compare_and_swap(this, nullptr);
ptr = nullptr;
flags -= cpu_flag::signal;
cpu_sleep_called = false;
store = true;
}
cpu_flag_memory = true;
state -= cpu_flag::memory;
}
if (state & (cpu_flag::exit + cpu_flag::dbg_global_stop))
{
state += cpu_flag::wait;
return true;
}
const auto [state0, escape] = state.fetch_op([&](bs_t<cpu_flag>& flags)
{
// Atomically clean wait flag and escape
if (!(flags & (cpu_flag::exit + cpu_flag::dbg_global_stop + cpu_flag::ret + cpu_flag::stop)))
{
// Check pause flags which hold thread inside check_state
if (flags & (cpu_flag::pause + cpu_flag::suspend + cpu_flag::dbg_global_pause + cpu_flag::dbg_pause))
{
return false;
escape = false;
return store;
}
flags -= cpu_flag::wait;
if (flags & cpu_flag::memory)
{
// wait flag will be cleared later (optimization)
cpu_flag_memory = true;
}
else
{
AUDIT(!cpu_flag_memory);
flags -= cpu_flag::wait;
store = true;
}
retval = false;
}
else
{
cpu_flag_memory = false;
retval = true;
}
return true;
});
if (flags & cpu_flag::dbg_step)
{
flags += cpu_flag::dbg_pause;
flags -= cpu_flag::dbg_step;
store = true;
}
if (state & cpu_flag::signal && state.test_and_reset(cpu_flag::signal))
{
cpu_sleep_called = false;
}
escape = true;
return store;
}).first;
if (escape)
{
if (cpu_flag_memory)
{
cpu_mem();
if (state & (cpu_flag::pause + cpu_flag::memory)) [[unlikely]]
{
state += cpu_flag::wait;
continue;
}
}
break;
return retval;
}
else if (!cpu_sleep_called && state0 & cpu_flag::suspend)
{
@ -540,21 +560,6 @@ bool cpu_thread::check_state() noexcept
g_fxo->get<cpu_counter>()->cpu_suspend_lock.lock_unlock();
}
}
const auto state_ = state.load();
if (state_ & (cpu_flag::ret + cpu_flag::stop))
{
return true;
}
if (state_ & cpu_flag::dbg_step)
{
state += cpu_flag::dbg_pause;
state -= cpu_flag::dbg_step;
}
return false;
}
void cpu_thread::notify()

24
rpcs3/Emu/Memory/vm.cpp
View File

@ -129,9 +129,30 @@ namespace vm
{
if (g_tls_locked && *g_tls_locked == &cpu) [[unlikely]]
{
if (cpu.state & cpu_flag::wait)
{
while (true)
{
g_mutex.lock_unlock();
cpu.state -= cpu_flag::wait + cpu_flag::memory;
if (g_mutex.is_lockable()) [[likely]]
{
return;
}
cpu.state += cpu_flag::wait;
}
}
return;
}
if (cpu.state & cpu_flag::memory)
{
cpu.state -= cpu_flag::memory;
}
if (g_mutex.is_lockable()) [[likely]]
{
// Optimistic path (hope that mutex is not exclusively locked)
@ -355,7 +376,8 @@ namespace vm
for (auto lock = g_locks.cbegin(), end = lock + g_cfg.core.ppu_threads; lock != end; lock++)
{
while (*lock)
cpu_thread* ptr;
while ((ptr = *lock) && !(ptr->state & cpu_flag::wait))
{
_mm_pause();
}