New update of libnfs will have a new API that changes some signatures,
primarily in order to make nfs_[p]read[_async] calls
zero-copy in the sense that (almost) no data copy is done in the library
and READ3/READ4 payloads are read straigth from the socket into the
application buffer.
In-library zero-copy only works for !krb5 and !tls sessions but can provide
significant boost for read-intensive workloads when can be used.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@xxxxxxxxx>
---
engines/nfs.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/engines/nfs.c b/engines/nfs.c
index 6bc4af1f..13b55038 100644
--- a/engines/nfs.c
+++ b/engines/nfs.c
@@ -157,16 +157,28 @@ static int queue_write(struct fio_libnfs_options *o, struct io_u *io_u)
{
struct nfs_data *nfs_data = io_u->engine_data;
+#ifdef LIBNFS_API_V2
+ return nfs_pwrite_async(o->context, nfs_data->nfsfh,
+ io_u->buf, io_u->buflen, io_u->offset,
+ nfs_callback, io_u);
+#else
return nfs_pwrite_async(o->context, nfs_data->nfsfh, io_u->offset,
io_u->buflen, io_u->buf, nfs_callback, io_u);
+#endif
}
static int queue_read(struct fio_libnfs_options *o, struct io_u *io_u)
{
struct nfs_data *nfs_data = io_u->engine_data;
+#ifdef LIBNFS_API_V2
+ return nfs_pread_async(o->context, nfs_data->nfsfh,
+ io_u->buf, io_u->buflen, io_u->offset,
+ nfs_callback, io_u);
+#else
return nfs_pread_async(o->context, nfs_data->nfsfh, io_u->offset,
io_u->buflen, nfs_callback, io_u);
+#endif
}
static enum fio_q_status fio_libnfs_queue(struct thread_data *td,
--
2.47.1
