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-rwxr-xr-xcddl/contrib/dtracetoolkit/FS/rfileio.d91
1 files changed, 91 insertions, 0 deletions
diff --git a/cddl/contrib/dtracetoolkit/FS/rfileio.d b/cddl/contrib/dtracetoolkit/FS/rfileio.d
new file mode 100755
index 000000000000..95a6caad5c6f
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+++ b/cddl/contrib/dtracetoolkit/FS/rfileio.d
@@ -0,0 +1,91 @@
+#!/usr/sbin/dtrace -s
+/*
+ * rfileio.d - read file I/O stats, with cache miss rate.
+ * Written using DTrace (Solaris 10 3/05)
+ *
+ * This script provides statistics on the number of reads and the bytes
+ * read from filesystems (logical), and the number of bytes read from
+ * disk (physical). A summary is printed every five seconds by file.
+ *
+ * A total miss-rate is also provided for the file system cache.
+ *
+ * $Id: rfileio.d 3 2007-08-01 10:50:08Z brendan $
+ *
+ * USAGE: rfileio.d
+ *
+ * IDEA: Richard McDougall, Solaris Internals 2nd Ed, FS Chapter.
+ *
+ * COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
+ *
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License"). You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at Docs/cddl1.txt
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * CDDL HEADER END
+ *
+ * 19-Mar-2006 Brendan Gregg Created this.
+ * 23-Apr-2006 " " Last update.
+ */
+
+#pragma D option quiet
+
+self int trace;
+uint64_t lbytes;
+uint64_t pbytes;
+
+dtrace:::BEGIN
+{
+ trace("Tracing...\n");
+}
+
+fbt::fop_read:entry
+/self->trace == 0 && args[0]->v_path/
+{
+ self->pathname = cleanpath(args[0]->v_path);
+ @rio[self->pathname, "logical"] = count();
+ lbytes += args[1]->uio_resid;
+ self->size = args[1]->uio_resid;
+ self->uiop = args[1];
+}
+
+fbt::fop_read:return
+/self->size/
+{
+ @rbytes[self->pathname, "logical"] =
+ sum(self->size - self->uiop->uio_resid);
+ self->size = 0;
+ self->uiop = 0;
+ self->pathname = 0;
+}
+
+io::bdev_strategy:start
+/self->size && args[0]->b_flags & B_READ/
+{
+ @rio[self->pathname, "physical"] = count();
+ @rbytes[self->pathname, "physical"] = sum(args[0]->b_bcount);
+ pbytes += args[0]->b_bcount;
+}
+
+profile:::tick-5s
+{
+ trunc(@rio, 20);
+ trunc(@rbytes, 20);
+ printf("\033[H\033[2J");
+ printf("\nRead IOPS, top 20 (count)\n");
+ printa("%-54s %10s %10@d\n", @rio);
+ printf("\nRead Bandwidth, top 20 (bytes)\n");
+ printa("%-54s %10s %10@d\n", @rbytes);
+ printf("\nTotal File System miss-rate: %d%%\n",
+ lbytes ? 100 * pbytes / lbytes : 0);
+ trunc(@rbytes);
+ trunc(@rio);
+ lbytes = pbytes = 0;
+}