ARM64 SVE: GatherVectorWithByteOffsetFirstFaulting failures during stress testing

[a74nh]

With today's HEAD (dc0432b)

When running stress tetsing, I sometimes get errors with GatherVectorWithByteOffsetFirstFaulting. Seems to be inconsistent when it occurs.

Using HardwareIntrinsics_Arm_ro.dll

===================Running jitstress===================
------------------- {'JitMinOpts': '1'} -------------------
------------------- {'JitStress': '1'} -------------------
------------------- {'JitStress': '2'} -------------------
------------------- {'JitStress': '1', 'TieredCompilation': '1'} -------------------
------------------- {'JitStress': '2', 'TieredCompilation': '1'} -------------------
Test failed:
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Sve.GatherVectorWithByteOffsetFirstFaulting<Single>(Single, Single, Int32): RunBasicScenario_LoadFirstFaulting failed:
       firstOp: (1E-45, 0, 1E-45, 1)
      secondOp: (0.6533055)
       thirdOp: (0, 237, 3, 12)
        result: (0.6533055, 0, 1.5155E-41, 0)
   faultResult: (<1, 1, 0, 0>)
..........................................
System.Exception: One or more scenarios did not complete as expected.
   at JIT.HardwareIntrinsics.Arm._Sve.Program.Sve_GatherVectorWithByteOffsetFirstFaulting_float_int() in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/Arm/Sve/Sve_ro/Sve_ro/gen/Sve.GatherVectorWithByteOffsetFirstFaulting.float.int.cs:line 86
   at Program.<<Main>$>g__TestExecutor3308|0_3309(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&) in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/HardwareIntrinsics_Arm_ro/generated/XUnitWrapperGenerator/XUnitWrapperGenerator.XUnitWrapperGenerator/FullRunner.g.cs:line 83607
------------------- {'TailcallStress': '1'} -------------------
------------------- {'ReadyToRun': '0'} -------------------
===================Running jitstressregs===================
------------------- {'JitStressRegs': '1'} -------------------
------------------- {'JitStressRegs': '2'} -------------------
------------------- {'JitStressRegs': '3'} -------------------
------------------- {'JitStressRegs': '4'} -------------------
------------------- {'JitStressRegs': '8'} -------------------
------------------- {'JitStressRegs': '0x10'} -------------------
------------------- {'JitStressRegs': '0x80'} -------------------
Test failed:
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Sve.GatherVectorWithByteOffsetFirstFaulting<Int32>(Int32, Int32, Int32): RunBasicScenario_LoadFirstFaulting failed:
       firstOp: (1, 0, 1, 1)
      secondOp: (1532479874)
       thirdOp: (0, 155, 3, 12)
        result: (1532479874, 0, 9496155, 0)
   faultResult: (<1, 1, 0, 0>)
..........................................
System.Exception: One or more scenarios did not complete as expected.
   at JIT.HardwareIntrinsics.Arm._Sve.Program.Sve_GatherVectorWithByteOffsetFirstFaulting_int() in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/Arm/Sve/Sve_ro/Sve_ro/gen/Sve.GatherVectorWithByteOffsetFirstFaulting.int.cs:line 86
   at Program.<<Main>$>g__TestExecutor3309|0_3310(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&) in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/HardwareIntrinsics_Arm_ro/generated/XUnitWrapperGenerator/XUnitWrapperGenerator.XUnitWrapperGenerator/FullRunner.g.cs:line 83631
------------------- {'JitStressRegs': '0x1000'} -------------------
------------------- {'JitStressRegs': '0x2000'} -------------------
===================Running jitstress2-jitstressregs===================
------------------- {'JitStress': '2', 'JitStressRegs': '1'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '2'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '3'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '4'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '8'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '0x10'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '0x80'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '0x1000'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '0x2000'} -------------------

On another run:

===================Running jitstress2-jitstressregs===================
------------------- {'JitStress': '2', 'JitStressRegs': '1'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '2'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '3'} -------------------
------------------- {'JitStress': '2', 'JitStressRegs': '4'} -------------------
Test failed:
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Sve.GatherVectorUInt32WithByteOffsetsZeroExtendFirstFaulting<Int32>(Int32, UInt32, Int32): RunBasicScenario_LoadFirstFaulting failed:
       firstOp: (0, 1, 1, 1)
      secondOp: (483312, 111609)
       thirdOp: (172, 0, 7, 12)
        result: (0, 483312, 0, 0)
   faultResult: (<1, 1, 0, 0>)
..........................................
System.Exception: One or more scenarios did not complete as expected.
   at JIT.HardwareIntrinsics.Arm._Sve.Program.Sve_GatherVectorUInt32WithByteOffsetsZeroExtendFirstFaulting_offsets_int_int() in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/Arm/Sve/Sve_ro/Sve_ro/gen/Sve.GatherVectorUInt32WithByteOffsetsZeroExtendFirstFaulting.offsets.int.int.cs:line 76
   at Program.<<Main>$>g__TestExecutor3284|0_3285(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&) in /home/alahay01/dotnet/runtime_sve/artifacts/tests/coreclr/obj/linux.arm64.Checked/Managed/JIT/HardwareIntrinsics/HardwareIntrinsics_Arm_ro/generated/XUnitWrapperGenerator/XUnitWrapperGenerator.XUnitWrapperGenerator/FullRunner.g.cs:line 83031

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[SwapnilGaikwad]

Hi @amanasifkhalid, do you still see this issue. I couldn't reproduce this.
However, I saw another failure instead and that occurs rarely, 1 out of 10 times. I'll open an issue for it. Although, not sure how to reproduce that.

[SwapnilGaikwad]

I saw another failure instead and that occurs rarely, 1 out of 10 times. I'll open an issue for it

Opened #106815.