vendor/dtracetoolkit/dtracetoolkit-20120512vendor/dtracetoolkit

1 files changed, 37 insertions, 0 deletions

diff --git a/Examples/rwbytype_example.txt b/Examples/rwbytype_example.txt
new file mode 100644
index 000000000000..118cf1657c64
--- /dev/null
+++ b/Examples/rwbytype_example.txt
@@ -0,0 +1,37 @@
+The following is an example fo the rwbytype.d script.
+
+
+We run rwbytype.d for a few seconds then hit Ctrl-C,
+
+   # rwbytype.d
+   Tracing... Hit Ctrl-C to end.
+   ^C
+   PID    CMD               VTYPE  DIR     BYTES
+   1545   sshd                chr    W         1
+   10357  more                chr    R        30
+   2357   sshd                chr    W        31
+   10354  dtrace              chr    W        32
+   1545   sshd                chr    R        34
+   6778   bash                chr    W        44
+   1545   sshd               sock    R        52
+   405    poold               reg    W        68
+   1545   sshd               sock    W       136
+   10357  bash                reg    R       481
+   10356  find                reg    R       481
+   10355  bash                reg    R       481
+   10357  more                reg    R      1652
+   2357   sshd               sock    R      1664
+   10357  more                chr    W     96925
+   10357  more               fifo    R     97280
+   2357   sshd                chr    R     98686
+   10356  grep               fifo    W    117760
+   2357   sshd               sock    W    118972
+   10356  grep                reg    R    147645
+
+Here we can see that the grep process with PID 10356 read 147645 bytes
+from "regular" files. These are I/O bytes at the application level, so
+much of these read bytes would have been cached by the filesystem page cache.
+
+vnode file types are listed in /usr/include/sys/vnode.h, and give an idea of
+what the file descriptor refers to.
+