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8376794: Enable copy and mismatch Partial Inlining for AMD AVX512 targets

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Reviewed-by: sviswanathan, thartmann
This commit is contained in:
Jatin Bhateja 2026-02-12 06:52:08 +00:00
parent 5868d351e2
commit 6abb29cc07
2 changed files with 74 additions and 32 deletions
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63
src/hotspot/cpu/x86/vm_version_x86.cpp
View File

@ -1659,41 +1659,40 @@ void VM_Version::get_processor_features() {
if (FLAG_IS_DEFAULT(AllocatePrefetchInstr) && supports_3dnow_prefetch()) {
FLAG_SET_DEFAULT(AllocatePrefetchInstr, 3);
}
#ifdef COMPILER2
if (UseAVX > 2) {
if (FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize) ||
(!FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize) &&
ArrayOperationPartialInlineSize != 0 &&
ArrayOperationPartialInlineSize != 16 &&
ArrayOperationPartialInlineSize != 32 &&
ArrayOperationPartialInlineSize != 64)) {
int inline_size = 0;
if (MaxVectorSize >= 64 && AVX3Threshold == 0) {
inline_size = 64;
} else if (MaxVectorSize >= 32) {
inline_size = 32;
} else if (MaxVectorSize >= 16) {
inline_size = 16;
}
if(!FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize)) {
warning("Setting ArrayOperationPartialInlineSize as %d", inline_size);
}
ArrayOperationPartialInlineSize = inline_size;
}
if (ArrayOperationPartialInlineSize > MaxVectorSize) {
ArrayOperationPartialInlineSize = MaxVectorSize >= 16 ? MaxVectorSize : 0;
if (ArrayOperationPartialInlineSize) {
warning("Setting ArrayOperationPartialInlineSize as MaxVectorSize=%zd", MaxVectorSize);
} else {
warning("Setting ArrayOperationPartialInlineSize as %zd", ArrayOperationPartialInlineSize);
}
}
}
#endif
}
#ifdef COMPILER2
if (UseAVX > 2) {
if (FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize) ||
(!FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize) &&
ArrayOperationPartialInlineSize != 0 &&
ArrayOperationPartialInlineSize != 16 &&
ArrayOperationPartialInlineSize != 32 &&
ArrayOperationPartialInlineSize != 64)) {
int inline_size = 0;
if (MaxVectorSize >= 64 && AVX3Threshold == 0) {
inline_size = 64;
} else if (MaxVectorSize >= 32) {
inline_size = 32;
} else if (MaxVectorSize >= 16) {
inline_size = 16;
}
if(!FLAG_IS_DEFAULT(ArrayOperationPartialInlineSize)) {
warning("Setting ArrayOperationPartialInlineSize as %d", inline_size);
}
ArrayOperationPartialInlineSize = inline_size;
}
if (ArrayOperationPartialInlineSize > MaxVectorSize) {
ArrayOperationPartialInlineSize = MaxVectorSize >= 16 ? MaxVectorSize : 0;
if (ArrayOperationPartialInlineSize) {
warning("Setting ArrayOperationPartialInlineSize as MaxVectorSize=%zd", MaxVectorSize);
} else {
warning("Setting ArrayOperationPartialInlineSize as %zd", ArrayOperationPartialInlineSize);
}
}
}
if (FLAG_IS_DEFAULT(OptimizeFill)) {
if (MaxVectorSize < 32 || (!EnableX86ECoreOpts && !VM_Version::supports_avx512vlbw())) {
OptimizeFill = false;

43
test/micro/org/openjdk/bench/jdk/incubator/vector/ArrayMismatchBenchmark.java
View File

@ -26,6 +26,7 @@ package org.openjdk.bench.jdk.incubator.vector;
import jdk.incubator.vector.ByteVector;
import jdk.incubator.vector.ShortVector;
import jdk.incubator.vector.DoubleVector;
import jdk.incubator.vector.IntVector;
import jdk.incubator.vector.LongVector;
@ -59,6 +60,9 @@ public class ArrayMismatchBenchmark {
byte[] byteData1;
byte[] byteData2;
short[] shortData1;
short[] shortData2;
int[] intData1;
int[] intData2;
@ -69,6 +73,7 @@ public class ArrayMismatchBenchmark {
double[] doubleData2;
static final VectorSpecies<Byte> BYTE_SPECIES_PREFERRED = ByteVector.SPECIES_PREFERRED;
static final VectorSpecies<Short> SHORT_SPECIES_PREFERRED = ShortVector.SPECIES_PREFERRED;
static final VectorSpecies<Integer> INT_SPECIES_PREFERRED = IntVector.SPECIES_PREFERRED;
static final VectorSpecies<Double> FLOAT_SPECIES_PREFERRED = DoubleVector.SPECIES_PREFERRED;
static final VectorSpecies<Long> LONG_SPECIES_PREFERRED = LongVector.SPECIES_PREFERRED;
@ -89,6 +94,16 @@ public class ArrayMismatchBenchmark {
System.arraycopy(commonBytes, 0, byteData1, 0, common);
System.arraycopy(commonBytes, 0, byteData2, 0, common);
} else if (params.getBenchmark().endsWith("Short")) {
shortData1 = new short[size];
shortData2 = new short[size];
Arrays.fill(shortData1, (short)random.nextInt());
Arrays.fill(shortData2, (short)random.nextInt());
short[] commonShorts = new short[common];
Arrays.fill(commonShorts, (short)random.nextInt());
System.arraycopy(commonShorts, 0, shortData1, 0, common);
System.arraycopy(commonShorts, 0, shortData2, 0, common);
} else if (params.getBenchmark().endsWith("Int")) {
intData1 = random.ints(size).toArray();
intData2 = random.ints(size).toArray();
@ -141,6 +156,34 @@ public class ArrayMismatchBenchmark {
return mismatch;
}
@Benchmark
public int mismatchIntrinsicShort() {
return Arrays.mismatch(shortData1, shortData2);
}
@Benchmark
public int mismatchVectorShort() {
int length = Math.min(shortData1.length, shortData2.length);
int index = 0;
for (; index < SHORT_SPECIES_PREFERRED.loopBound(length); index += SHORT_SPECIES_PREFERRED.length()) {
ShortVector vector1 = ShortVector.fromArray(SHORT_SPECIES_PREFERRED, shortData1, index);
ShortVector vector2 = ShortVector.fromArray(SHORT_SPECIES_PREFERRED, shortData2, index);
VectorMask<Short> mask = vector1.compare(VectorOperators.NE, vector2);
if (mask.anyTrue()) {
return index + mask.firstTrue();
}
}
// process the tail
int mismatch = -1;
for (int i = index; i < length; ++i) {
if (shortData1[i] != shortData2[i]) {
mismatch = i;
break;
}
}
return mismatch;
}
@Benchmark
public int mismatchIntrinsicInt() {
return Arrays.mismatch(intData1, intData2);