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vm_native.cpp: add MADV_HUGEPAGE

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It enables Transparend Huge Pages for some regions on Linux.
Although it can't be actively useful, it seems to do something.
Maybe it's even harmful for recompilers.
This commit is contained in:
Nekotekina 2020-11-24 10:04:48 +03:00
parent 27097cbcfe
commit ab248e170c
1 changed files with 15 additions and 1 deletions
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16
rpcs3/util/vm_native.cpp
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@ -74,6 +74,8 @@ namespace utils
return nullptr;
}
const auto orig_size = size;
if (!use_addr)
{
// Hack: Ensure aligned 64k allocations
@ -107,6 +109,11 @@ namespace utils
ptr = static_cast<u8*>(ptr) + (0x10000 - misalign);
}
#ifdef MADV_HUGEPAGE
if (orig_size % 0x200000 == 0)
verify(HERE), ::madvise(ptr, orig_size, MADV_HUGEPAGE) != -1;
#endif
return ptr;
#endif
}
@ -151,6 +158,11 @@ namespace utils
#endif
verify(HERE), ::mmap(pointer, size, +prot, MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0) != reinterpret_cast<void*>(-1);
verify(HERE), ::madvise(reinterpret_cast<void*>(ptr64 & -4096), size + (ptr64 & 4095), MADV_WILLNEED) != -1;
#ifdef MADV_HUGEPAGE
if (size % 0x200000 == 0)
verify(HERE), ::madvise(reinterpret_cast<void*>(ptr64 & -4096), size + (ptr64 & 4095), MADV_HUGEPAGE) != -1;
#endif
#endif
}
@ -273,7 +285,9 @@ namespace utils
if (ptr64)
{
return reinterpret_cast<u8*>(reinterpret_cast<u64>(::mmap(reinterpret_cast<void*>(ptr64), m_size, +prot, MAP_SHARED | MAP_FIXED, m_file, 0)));
const auto result = ::mmap(reinterpret_cast<void*>(ptr64), m_size, +prot, MAP_SHARED | MAP_FIXED, m_file, 0);
return reinterpret_cast<u8*>(result);
}
else
{