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vm: Minor optimization for memory serialization

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Eladash 2023-11-27 15:33:04 +02:00 committed by Elad Ashkenazi
parent ac19a50f5f
commit f8ca5cdf56
2 changed files with 21 additions and 8 deletions
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25
rpcs3/Emu/Memory/vm.cpp
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@ -1617,14 +1617,14 @@ namespace vm
const v128 _5 = _1 | _2;
const v128 _6 = _3 | _4;
const v128 _7 = _5 | _6;
return _7 == v128{};
return gv_testz(_7);
}
static void serialize_memory_bytes(utils::serial& ar, u8* ptr, usz size)
{
ensure((size % 4096) == 0);
for (; size; ptr += 128 * 8)
for (usz iter_count = 0; size; iter_count++, ptr += 128 * 8)
{
const usz process_size = std::min<usz>(size, 128 * 8);
size -= process_size;
@ -1633,12 +1633,20 @@ namespace vm
if (ar.is_writing())
{
for (usz i = 0; i < process_size; i += 128)
for (usz i = 0; i < process_size; i += 128 * 2)
{
if (!check_cache_line_zero(ptr + i))
const u64 sample64_1 = read_from_ptr<u64>(ptr, i);
const u64 sample64_2 = read_from_ptr<u64>(ptr, i + 128);
// Speed up testing in scenarios where it is likely non-zero data
if (sample64_1 && sample64_2)
{
bitmap |= 1u << (i / 128);
bitmap |= 3u << (i / 128);
continue;
}
bitmap |= (check_cache_line_zero(ptr + i + 0) ? 0 : 1) << (i / 128);
bitmap |= (check_cache_line_zero(ptr + i + 128) ? 0 : 2) << (i / 128);
}
}
@ -1665,8 +1673,13 @@ namespace vm
i += block_count * 128;
}
ar.breathe();
if (iter_count % 256 == 0)
{
ar.breathe();
}
}
ar.breathe();
}
void block_t::save(utils::serial& ar, std::map<utils::shm*, usz>& shared)

4
rpcs3/util/serialization.hpp
View File

@ -453,9 +453,9 @@ namespace utils
// Execute only if past memory is known to not going be reused
void breathe(bool forced = false)
{
if (!forced && (!m_file_handler || (data.size() < 0x20'0000 && pos >= data_offset)))
if (!forced && (!m_file_handler || (data.size() < 0x100'0000 && pos >= data_offset)))
{
// Let's not do anything if less than 32MB
// Let's not do anything if less than 16MB
return;
}