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8329593: Drop adjustments to target parallelism when virtual threads do I/O on files opened for buffered I/O

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Reviewed-by: bpb, jpai
This commit is contained in:
Alan Bateman 2024-04-23 16:10:13 +00:00
parent b07e1531b3
commit 412e306d81
28 changed files with 461 additions and 870 deletions
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7
src/java.base/unix/classes/sun/nio/fs/UnixFileSystem.java
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@ -52,7 +52,6 @@ import java.util.Objects;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import jdk.internal.misc.Blocker;
import sun.nio.ch.DirectBuffer;
import sun.nio.ch.IOStatus;
import sun.security.action.GetPropertyAction;
@ -682,7 +681,6 @@ abstract class UnixFileSystem
// Some forms of direct copy do not work on zero size files
if (!directCopyNotSupported && attrs.size() > 0) {
// copy bytes to target using platform function
long comp = Blocker.begin();
try {
int res = directCopy(fo, fi, addressToPollForCancel);
if (res == 0) {
@ -692,8 +690,6 @@ abstract class UnixFileSystem
}
} catch (UnixException x) {
x.rethrowAsIOException(source, target);
} finally {
Blocker.end(comp);
}
}
@ -703,14 +699,11 @@ abstract class UnixFileSystem
ByteBuffer buf =
sun.nio.ch.Util.getTemporaryDirectBuffer(bufferSize);
try {
long comp = Blocker.begin();
try {
bufferedCopy(fo, fi, ((DirectBuffer)buf).address(),
bufferSize, addressToPollForCancel);
} catch (UnixException x) {
x.rethrowAsIOException(source, target);
} finally {
Blocker.end(comp);
}
} finally {
sun.nio.ch.Util.releaseTemporaryDirectBuffer(buf);