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8292562: (fc) Use copy_file_range in FileChannel::transferTo on Linux

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Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2022-08-26 16:12:58 +00:00
parent 3844685be0
commit c74b6d4552
4 changed files with 151 additions and 10 deletions
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12
src/java.base/share/classes/sun/nio/ch/FileChannelImpl.java
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@ -570,10 +570,11 @@ public class FileChannelImpl
ti = threads.add();
if (!isOpen())
return -1;
boolean append = fdAccess.getAppend(targetFD);
do {
long comp = Blocker.begin();
try {
n = transferTo0(fd, position, icount, targetFD);
n = transferTo0(fd, position, icount, targetFD, append);
} finally {
Blocker.end(comp);
}
@ -801,7 +802,8 @@ public class FileChannelImpl
do {
long comp = Blocker.begin();
try {
n = transferFrom0(srcFD, fd, position, count);
boolean append = fdAccess.getAppend(fd);
n = transferFrom0(srcFD, fd, position, count, append);
} finally {
Blocker.end(comp);
}
@ -1573,11 +1575,13 @@ public class FileChannelImpl
// Transfers from src to dst, or returns IOStatus.UNSUPPORTED (-4) or
// IOStatus.UNSUPPORTED_CASE (-6) if the kernel does not support it
private static native long transferTo0(FileDescriptor src, long position,
long count, FileDescriptor dst);
long count, FileDescriptor dst,
boolean append);
private static native long transferFrom0(FileDescriptor src,
FileDescriptor dst,
long position, long count);
long position, long count,
boolean append);
// Retrieves the maximum size of a transfer
private static native int maxDirectTransferSize0();