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Remove ignored bits in waitable atomics

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It was not implemented correctly.
This commit is contained in:
Nekotekina 2019-07-29 15:12:20 +03:00
parent 829047ecdb
commit e1db6cef6f
1 changed files with 5 additions and 8 deletions
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13
rpcs3/util/atomic.cpp
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@ -2,11 +2,8 @@
#include "Utilities/sync.h"
// Should be at least 65536, currently 1048576.
static constexpr std::uintptr_t s_hashtable_size = 1u << 20;
// ^2 means adjacent addresses within the same aligned u32 word will always collide.
static constexpr uint s_ignored_lsbits = 2;
// Should be at least 65536, currently 2097152.
static constexpr std::uintptr_t s_hashtable_size = 1u << 21;
// TODO: it's probably better to implement more effective futex emulation for OSX/BSD here.
static atomic_t<s64> s_hashtable[s_hashtable_size];
@ -36,7 +33,7 @@ void atomic_storage_futex::wait(const void* data, std::size_t size, u64 old_valu
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[(iptr >> s_ignored_lsbits) % s_hashtable_size];
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
u32 new_value = 0;
@ -130,7 +127,7 @@ void atomic_storage_futex::notify_one(const void* data)
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[(iptr >> s_ignored_lsbits) % s_hashtable_size];
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
const auto [prev, ok] = entry.fetch_op([&](s64& value)
{
@ -191,7 +188,7 @@ void atomic_storage_futex::notify_all(const void* data)
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[(iptr >> s_ignored_lsbits) % s_hashtable_size];
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
// Consume everything
#ifdef _WIN32