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Improve cpu_thread::suspend_all (TSX-FA)

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Add prefetching of cpu->state fields.
This commit is contained in:
Nekotekina 2020-10-18 20:09:39 +03:00
parent 120849c734
commit a5eb11d79f
1 changed files with 16 additions and 2 deletions
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18
rpcs3/Emu/CPU/CPUThread.cpp
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@ -782,6 +782,15 @@ bool cpu_thread::suspend_work::push(cpu_thread* _this, bool cancel_if_not_suspen
// First thread to push the work to the workload list pauses all threads and processes it
std::lock_guard lock(ctr->cpu_suspend_lock);
// Try to prefetch cpu->state earlier
for_all_cpu([&](cpu_thread* cpu)
{
if (cpu != _this)
{
_m_prefetchw(&cpu->state);
}
});
// Copy of thread bits
decltype(ctr->cpu_copy_bits) copy2{};
@ -804,8 +813,6 @@ bool cpu_thread::suspend_work::push(cpu_thread* _this, bool cancel_if_not_suspen
}
});
busy_wait(500);
while (std::accumulate(std::begin(ctr->cpu_copy_bits), std::end(ctr->cpu_copy_bits), u64{0}, std::bit_or()))
{
// Check only CPUs which haven't acknowledged their waiting state yet
@ -842,6 +849,13 @@ bool cpu_thread::suspend_work::push(cpu_thread* _this, bool cancel_if_not_suspen
while (prev);
}
for_all_cpu<true>([&](cpu_thread* cpu)
{
_m_prefetchw(&cpu->state);
});
_m_prefetchw(&g_suspend_counter);
// Execute all stored workload
for (s32 prio = max_prio; prio >= min_prio; prio--)
{