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[emulator] Improve emulator performance by optimizing memory access and reducing unnecessary overhead in kernel and CPU execution paths (#131)

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This commit is contained in:
Berk
2026-07-14 14:28:44 +03:00
committed by GitHub
parent 4f028d0483
commit cf6964710a
8 changed files with 528 additions and 31 deletions
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src/SharpEmu.Libs/Kernel/KernelRuntimeCompatExports.cs
+29 -8
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@@ -85,22 +85,29 @@ public static class KernelRuntimeCompatExports
ExportName = "sceKernelNanosleep",
Target = Generation.Gen4 | Generation.Gen5,
LibraryName = "libKernel")]
public static int KernelNanosleep(CpuContext ctx)
public static int KernelNanosleep(CpuContext ctx) => NanosleepCore(ctx, posix: false);
[SysAbiExport(
Nid = "yS8U2TGCe1A",
ExportName = "nanosleep",
Target = Generation.Gen4 | Generation.Gen5,
LibraryName = "libKernel")]
public static int PosixNanosleep(CpuContext ctx) => NanosleepCore(ctx, posix: true);
private static int NanosleepCore(CpuContext ctx, bool posix)
{
var requestAddress = ctx[CpuRegister.Rdi];
var remainAddress = ctx[CpuRegister.Rsi];
if (requestAddress == 0)
{
ctx[CpuRegister.Rax] = Einval;
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
return NanosleepFailure(ctx, posix, Einval, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
Span<byte> timespecBuffer = stackalloc byte[16];
if (!ctx.Memory.TryRead(requestAddress, timespecBuffer))
{
ctx[CpuRegister.Rax] = Efault;
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
return NanosleepFailure(ctx, posix, Efault, OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT);
}
var tvSec = BinaryPrimitives.ReadInt64LittleEndian(timespecBuffer);
@@ -108,8 +115,7 @@ public static class KernelRuntimeCompatExports
if (tvSec < 0 || tvNsec < 0 || tvNsec >= 1_000_000_000L)
{
ctx[CpuRegister.Rax] = Einval;
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
return NanosleepFailure(ctx, posix, Einval, OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT);
}
if (tvSec == 0 && tvNsec == 0)
@@ -119,7 +125,7 @@ public static class KernelRuntimeCompatExports
return (int)OrbisGen2Result.ORBIS_GEN2_OK;
}
GuestThreadExecution.Scheduler?.Pump(ctx, "sceKernelNanosleep");
GuestThreadExecution.Scheduler?.Pump(ctx, posix ? "nanosleep" : "sceKernelNanosleep");
// TimeSpan resolution is 100 ns ticks, so sub-100 ns requests round up to
// a single tick rather than collapsing to a zero-length (no-op) sleep.
@@ -138,6 +144,21 @@ public static class KernelRuntimeCompatExports
return (int)OrbisGen2Result.ORBIS_GEN2_OK;
}
private static int NanosleepFailure(CpuContext ctx, bool posix, int errnoValue, OrbisGen2Result sceResult)
{
if (posix)
{
TrySetErrno(ctx, errnoValue);
ctx[CpuRegister.Rax] = unchecked((ulong)(-1L));
}
else
{
ctx[CpuRegister.Rax] = unchecked((ulong)errnoValue);
}
return (int)sceResult;
}
private static void WriteRemainingTime(CpuContext ctx, ulong remainAddress, long seconds, long nanoseconds)
{
if (remainAddress == 0)