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:
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usr
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share
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doc
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bpfcc-tools
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examples
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tracing
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drwxr-xr-x
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upload
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mass delete
console
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name :
bitehist_example.txt
Demonstrations of bitehist.py, the Linux eBPF/bcc version. This prints a power-of-2 histogram to show the block I/O size distribution. A summary is printed after Ctrl-C is hit. # ./bitehist.py Tracing... Hit Ctrl-C to end. ^C kbytes : count distribution 0 -> 1 : 3 | | 2 -> 3 : 0 | | 4 -> 7 : 211 |********** | 8 -> 15 : 0 | | 16 -> 31 : 0 | | 32 -> 63 : 0 | | 64 -> 127 : 1 | | 128 -> 255 : 800 |**************************************| This output shows a bimodal distribution. The largest mod of 800 I/O were between 128 and 255 Kbytes in size, and another mode of 211 I/O were between 4 and 7 Kbytes in size. Understanding this distribution is useful for characterizing workloads and understanding performance. The existence of this distribution is not visible from averages alone.
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