diff options
Diffstat (limited to 'Examples/bitesize_example.txt')
| -rw-r--r-- | Examples/bitesize_example.txt | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Examples/bitesize_example.txt b/Examples/bitesize_example.txt new file mode 100644 index 000000000000..dcc697d5070d --- /dev/null +++ b/Examples/bitesize_example.txt @@ -0,0 +1,74 @@ +In this example, bitesize.d was run for several seconds then Ctrl-C was hit. +As bitesize.d runs it records how processes on the system are accessing the +disks - in particular the size of the I/O operation. It is usually desirable +for processes to be requesting large I/O operations rather than taking many +small "bites". + +The final report highlights how processes performed. The find command mostly +read 1K blocks while the tar command was reading large blocks - both as +expected. + + # bitesize.d + Tracing... Hit Ctrl-C to end. + ^C + + PID CMD + 7110 -bash\0 + + value ------------- Distribution ------------- count + 512 | 0 + 1024 |@@@@@@@@@@@@@@@@@@@@@@@@@@ 2 + 2048 | 0 + 4096 |@@@@@@@@@@@@@ 1 + 8192 | 0 + + 7110 sync\0 + + value ------------- Distribution ------------- count + 512 | 0 + 1024 |@@@@@ 1 + 2048 |@@@@@@@@@@ 2 + 4096 | 0 + 8192 |@@@@@@@@@@@@@@@@@@@@@@@@@ 5 + 16384 | 0 + + 0 sched\0 + + value ------------- Distribution ------------- count + 1024 | 0 + 2048 |@@@ 1 + 4096 | 0 + 8192 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 10 + 16384 | 0 + + 7109 find /\0 + + value ------------- Distribution ------------- count + 512 | 0 + 1024 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1452 + 2048 |@@ 91 + 4096 | 33 + 8192 |@@ 97 + 16384 | 0 + + 3 fsflush\0 + + value ------------- Distribution ------------- count + 4096 | 0 + 8192 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 449 + 16384 | 0 + + 7108 tar cf /dev/null /\0 + + value ------------- Distribution ------------- count + 256 | 0 + 512 | 70 + 1024 |@@@@@@@@@@ 1306 + 2048 |@@@@ 569 + 4096 |@@@@@@@@@ 1286 + 8192 |@@@@@@@@@@ 1403 + 16384 |@ 190 + 32768 |@@@ 396 + 65536 | 0 + + |