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Diffstat (limited to 'Examples/rwbytype_example.txt')
| -rw-r--r-- | Examples/rwbytype_example.txt | 37 |
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. + |