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75 lines
3.5 KiB
Plaintext
75 lines
3.5 KiB
Plaintext
In this example, bitesize.d was run for several seconds then Ctrl-C was hit.
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As bitesize.d runs it records how processes on the system are accessing the
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disks - in particular the size of the I/O operation. It is usually desirable
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for processes to be requesting large I/O operations rather than taking many
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small "bites".
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The final report highlights how processes performed. The find command mostly
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read 1K blocks while the tar command was reading large blocks - both as
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expected.
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# bitesize.d
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Tracing... Hit Ctrl-C to end.
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^C
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PID CMD
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7110 -bash\0
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value ------------- Distribution ------------- count
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512 | 0
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1024 |@@@@@@@@@@@@@@@@@@@@@@@@@@ 2
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2048 | 0
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4096 |@@@@@@@@@@@@@ 1
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8192 | 0
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7110 sync\0
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value ------------- Distribution ------------- count
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512 | 0
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1024 |@@@@@ 1
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2048 |@@@@@@@@@@ 2
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4096 | 0
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8192 |@@@@@@@@@@@@@@@@@@@@@@@@@ 5
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16384 | 0
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0 sched\0
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value ------------- Distribution ------------- count
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1024 | 0
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2048 |@@@ 1
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4096 | 0
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8192 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 10
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16384 | 0
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7109 find /\0
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value ------------- Distribution ------------- count
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512 | 0
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1024 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1452
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2048 |@@ 91
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4096 | 33
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8192 |@@ 97
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16384 | 0
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3 fsflush\0
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value ------------- Distribution ------------- count
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4096 | 0
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8192 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 449
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16384 | 0
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7108 tar cf /dev/null /\0
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value ------------- Distribution ------------- count
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256 | 0
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512 | 70
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1024 |@@@@@@@@@@ 1306
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2048 |@@@@ 569
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4096 |@@@@@@@@@ 1286
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8192 |@@@@@@@@@@ 1403
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16384 |@ 190
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32768 |@@@ 396
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65536 | 0
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