On Mon, 13 Nov 2023 08:36:44 GMT, Tobias Hartmann <thartm...@openjdk.org> wrote:
>> Below is baseline data collected using a modified version of the >> java.lang.foreign.xor micro benchmark referenced by @mcimadamore in the bug >> report. I collected data on an Ubuntu 22.04 laptop with a Tigerlake >> i7-1185G7, which does support AVX512. >> >> Baseline data >> Benchmark (arrayKind) (sizeKind) Mode Cnt Score >> Error Units >> -------------------------------------------------------------------------------------- >> XorTest.copy ELEMENTS SMALL avgt 30 584737355.767 ± >> 60414308.540 ns/op >> XorTest.copy ELEMENTS MEDIUM avgt 30 272248995.683 ± >> 2924954.498 ns/op >> XorTest.copy ELEMENTS LARGE avgt 30 1019200210.900 ± >> 28334453.652 ns/op >> XorTest.copy REGION SMALL avgt 30 7399944.164 ± >> 216821.819 ns/op >> XorTest.copy REGION MEDIUM avgt 30 20591454.558 ± >> 147398.572 ns/op >> XorTest.copy REGION LARGE avgt 30 21649266.051 ± >> 179263.875 ns/op >> XorTest.copy CRITICAL SMALL avgt 30 51079.357 ± >> 542.482 ns/op >> XorTest.copy CRITICAL MEDIUM avgt 30 2496.961 ± >> 11.375 ns/op >> XorTest.copy CRITICAL LARGE avgt 30 515.454 ± >> 5.831 ns/op >> XorTest.copy FOREIGN SMALL avgt 30 7558432.075 ± >> 79489.276 ns/op >> XorTest.copy FOREIGN MEDIUM avgt 30 19730666.341 ± >> 500505.099 ns/op >> XorTest.copy FOREIGN LARGE avgt 30 34616758.085 ± >> 340300.726 ns/op >> XorTest.xor ELEMENTS SMALL avgt 30 219832692.489 ± >> 2329417.319 ns/op >> XorTest.xor ELEMENTS MEDIUM avgt 30 505138197.167 ± >> 3818334.424 ns/op >> XorTest.xor ELEMENTS LARGE avgt 30 1189608474.667 ± >> 5877981.900 ns/op >> XorTest.xor REGION SMALL avgt 30 64093872.804 ± >> 599704.491 ns/op >> XorTest.xor REGION MEDIUM avgt 30 81544576.454 ± >> 1406342.118 ns/op >> XorTest.xor REGION LARGE avgt 30 90091424.883 ± >> 775577.613 ns/op >> XorTest.xor CRITICAL SMALL avgt 30 57231375.744 ± >> 438223.342 ns/op >> XorTest.xor CRITICAL MEDIUM avgt 30 58583884.930 ± >> 375355.215 ns/op >> XorTest.xor CRITICAL LARGE avgt 30 60644832.949 ± >> 588120.738 ns/op >> XorTest.xor FOREIGN SMALL avgt 30 73868679.405 ± >> 819965.524 ns/op >> XorTest.xor FOREIGN MEDIUM avgt 30 88156275.944 ± >> 1051257.152 ns/op >> Xo... > > I submitted some quick testing and I'm seeing the following failure with > multiple tests: > > > # A fatal error has been detected by the Java Runtime Environment: > # > # Internal Error > (/workspace/open/src/hotspot/cpu/x86/stubGenerator_x86_64_arraycopy.cpp:1201), > pid=24136, tid=24139 > # assert(MaxVectorSize == 64) failed: vector length != 64 > # > # JRE version: (22.0) (fastdebug build ) > # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug > 22-internal-2023-11-13-0750559.tobias.hartmann.jdk2, mixed mode, sharing, > compressed oops, compressed class ptrs, g1 gc, linux-amd64) > # Problematic frame: > # V [libjvm.so+0x16c00e6] StubGenerator::copy64_masked_avx(Register, > Register, XMMRegister, KRegister, Register, Register, Register, int, int, > bool)+0x366 > > Stack: [0x00007f0b5e919000,0x00007f0b5ea1a000], sp=0x00007f0b5ea17150, free > space=1016k > Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native > code) > V [libjvm.so+0x16c00e6] StubGenerator::copy64_masked_avx(Register, > Register, XMMRegister, KRegister, Register, Register, Register, int, int, > bool)+0x366 (stubGenerator_x86_64_arraycopy.cpp:1201) > V [libjvm.so+0x16c0ecd] > StubGenerator::arraycopy_avx3_special_cases_256(XMMRegister, KRegister, > Register, Register, Register, int, Register, Register, Label&, Label&)+0x19d > (stubGenerator_x86_64_arraycopy.cpp:1055) > V [libjvm.so+0x16c16c1] StubGenerator::arraycopy_avx3_large(Register, > Register, Register, Register, Register, Register, Register, XMMRegister, > XMMRegister, XMMRegister, XMMRegister, int)+0x3f1 > (stubGenerator_x86_64_arraycopy.cpp:790) > V [libjvm.so+0x16c22f0] > StubGenerator::generate_disjoint_copy_avx3_masked(unsigned char**, char > const*, int, bool, bool, bool)+0xa90 (stubGenerator_x86_64_arraycopy.cpp:728) > V [libjvm.so+0x16c4b85] StubGenerator::generate_disjoint_byte_copy(bool, > unsigned char**, char const*)+0x965 (stubGenerator_x86_64_arraycopy.cpp:1277) > V [libjvm.so+0x16cb309] StubGenerator::generate_arraycopy_stubs()+0x29 > (stubGenerator_x86_64_arraycopy.cpp:88) > V [libjvm.so+0x16a1089] StubGenerator::generate_final_stubs()+0xb9 > (stubGenerator_x86_64.cpp:4051) > V [libjvm.so+0x16a22a5] StubGenerator_generate(CodeBuffer*, > StubCodeGenerator::StubsKind)+0x105 (stubGenerator_x86_64.cpp:4296) > V [libjvm.so+0x16f349e] initialize_stubs(StubCodeGenerator::StubsKind, int, > int, char const*, char const*, char const*)+0x13e (stubRoutines.cpp:241) > V [libjvm.so+0x16f500d] final_stubs_init()+0x3d (stubRoutines.cpp:288) > V [libjvm.so+0xe30c59]... Thank you @TobiHartmann for the feedback. I'm working on the issue. ------------- PR Comment: https://git.openjdk.org/jdk/pull/16575#issuecomment-1809390162
