Add support for Fusion-io atomic write engine
authorSanthosh Koundinya <SKoundinya@fusionio.com>
Tue, 18 Sep 2012 21:20:21 +0000 (23:20 +0200)
committerJens Axboe <axboe@kernel.dk>
Tue, 18 Sep 2012 21:20:21 +0000 (23:20 +0200)
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Makefile
engines/fusion-aw.c [new file with mode: 0644]
examples/fusion-aw-sync.ini [new file with mode: 0644]

index bac062c..5e90ca2 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,8 @@ ifeq ($(UNAME), Linux)
   SOURCE += diskutil.c fifo.c blktrace.c helpers.c cgroup.c trim.c \
                engines/libaio.c engines/posixaio.c engines/sg.c \
                engines/splice.c engines/syslet-rw.c engines/guasi.c \
-               engines/binject.c engines/rdma.c profiles/tiobench.c
+               engines/binject.c engines/rdma.c profiles/tiobench.c \
+               engines/fusion-aw.c
   LIBS += -lpthread -ldl -lrt -laio
   LDFLAGS += -rdynamic
 endif
diff --git a/engines/fusion-aw.c b/engines/fusion-aw.c
new file mode 100644 (file)
index 0000000..0f9025f
--- /dev/null
@@ -0,0 +1,176 @@
+/*
+ * Custom fio(1) engine that submits synchronous atomic writes to file.
+ *
+ * Copyright (C) 2012 Fusion-io, Inc.
+ * Author: Santhosh Kumar Koundinya.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; under version 2 of the License.  You may obtain a copy
+ * of the source code for DirectFS by sending a request to Fusion-io, Inc.,
+ * 2855 E. Cottonwood Parkway, Suite 100, Salt Lake City, UT 84121; Attention:
+ * Legal Department.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License version
+ * 2 for more details.
+ *
+ * You should have received a copy of the GNU General Public License Version 2
+ * along with this program; if not see <http://www.gnu.org/licenses/>
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "../fio.h"
+
+#ifdef FIO_HAVE_FUSION_AW
+
+#include <vsl_dp_experimental/vectored_write.h>
+
+/* Fix sector size to 512 bytes independent of actual sector size, just like
+ * the linux kernel. */
+#define SECTOR_SHIFT    9
+#define SECTOR_SIZE    (1U<<SECTOR_SHIFT)
+
+struct acs_file_data {
+       struct vsl_iovec iov[IO_VECTOR_LIMIT];
+};
+
+static int queue(struct thread_data *td, struct io_u *io_u)
+{
+       int rc;
+       int iov_index;
+       off_t offset;
+       char *xfer_buf;
+       size_t xfer_buflen;
+       struct acs_file_data *d = io_u->file->file_data;
+
+       if (io_u->ddir != DDIR_WRITE) {
+               td_vmsg(td, -EIO, "only writes supported", "io_u->ddir");
+               rc = -EIO;
+               goto out;
+       }
+       if (io_u->xfer_buflen > IO_SIZE_MAX) {
+               td_vmsg(td, -EIO, "data too big", "io_u->xfer_buflen");
+               rc = -EIO;
+               goto out;
+       }
+       if (io_u->xfer_buflen & (SECTOR_SIZE - 1)) {
+               td_vmsg(td, -EIO, "unaligned data size", "io_u->xfer_buflen");
+               rc = -EIO;
+               goto out;
+       }
+
+       /* Chop up the write into minimal number of iovec's necessary */
+       iov_index = 0;
+       offset = io_u->offset;
+       xfer_buf = io_u->xfer_buf;
+       xfer_buflen = io_u->xfer_buflen;
+       while (xfer_buflen) {
+               struct vsl_iovec *iov = &d->iov[iov_index++];
+
+               iov->iov_len = xfer_buflen > IO_VECTOR_MAX_SIZE ?
+                   IO_VECTOR_MAX_SIZE : xfer_buflen;
+               iov->iov_base = (uint64_t) xfer_buf;
+               iov->sector = offset >> SECTOR_SHIFT;
+               iov->iov_flag = VSL_IOV_WRITE;
+
+               offset += iov->iov_len;
+               xfer_buf += iov->iov_len;
+               xfer_buflen -= iov->iov_len;
+       }
+       assert(xfer_buflen == 0);
+       assert(iov_index <= IO_VECTOR_LIMIT);
+
+       rc = vsl_vectored_write(io_u->file->fd, d->iov, iov_index, O_ATOMIC);
+       if (rc == -1) {
+               td_verror(td, -errno, "vsl_vectored_write");
+               rc = -EIO;
+               goto out;
+       } else {
+               io_u->error = 0;
+               io_u->file->file_pos = io_u->offset + rc;
+               rc = FIO_Q_COMPLETED;
+       }
+
+out:
+       if (rc < 0)
+               io_u->error = rc;
+
+       return rc;
+}
+
+static int open_file(struct thread_data *td, struct fio_file *f)
+{
+       int rc;
+       struct acs_file_data *d = NULL;
+
+       d = malloc(sizeof(*d));
+       if (!d) {
+               td_verror(td, -ENOMEM, "malloc");
+               rc = -ENOMEM;
+               goto error;
+       }
+       f->file_data = d;
+
+       rc = generic_open_file(td, f);
+
+out:
+       return rc;
+
+error:
+       f->fd = -1;
+       f->file_data = NULL;
+       if (d)
+               free(d);
+
+       goto out;
+}
+
+static int close_file(struct thread_data *td, struct fio_file *f)
+{
+       if (f->file_data) {
+               free(f->file_data);
+               f->file_data = NULL;
+       }
+
+       return generic_close_file(td, f);
+}
+
+static struct ioengine_ops ioengine = {
+       .name = "fusion-aw-sync",
+       .version = FIO_IOOPS_VERSION,
+       .queue = queue,
+       .open_file = open_file,
+       .close_file = close_file,
+       .get_file_size = generic_get_file_size,
+       .flags = FIO_SYNCIO | FIO_RAWIO | FIO_MEMALIGN
+};
+
+#else /* !FUSION_HAVE_FUSION_AW */
+
+static int fio_fusion_aw_eng_init(struct thread_data fio_unused *td)
+{
+       log_err("fio: fusion atomic write engine not available\n");
+       return 1;
+}
+
+static struct ioengine_ops ioengine = {
+       .name           = "fusion-aw-sync",
+       .version        = FIO_IOOPS_VERSION,
+       .init           = fio_fusion_aw_eng_init,
+};
+
+#endif /* FUSION_HAVE_FUSION_AW */
+
+static void fio_init fio_fusion_aw_init(void)
+{
+       register_ioengine(&ioengine);
+}
+
+static void fio_exit fio_fusion_aw_exit(void)
+{
+       unregister_ioengine(&ioengine);
+}
diff --git a/examples/fusion-aw-sync.ini b/examples/fusion-aw-sync.ini
new file mode 100644 (file)
index 0000000..c4639f0
--- /dev/null
@@ -0,0 +1,15 @@
+# Example Job File that randomly writes 8k worth of data atomically for
+# 60 seconds.
+[rw_aw_file_sync]
+rw=randwrite
+ioengine=fusion-aw-sync
+blocksize=8k
+blockalign=8k
+
+filename=/mnt/fs/file
+randrepeat=1
+fallocate=none
+direct=1
+invalidate=0
+runtime=60
+time_based