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biopattern_example.txt
Demonstrations of biopattern, the Linux eBPF/bcc version. biopattern identifies random/sequential disk access patterns. Example: # ./biopattern.py TIME DISK %RND %SEQ COUNT KBYTES 22:03:51 vdb 0 99 788 3184 22:03:51 Unknown 0 100 4 0 22:03:51 vda 85 14 21 488 [...] The -d option only print the matched disk. # ./biopattern.py -d vdb 1 10 TIME DISK %RND %SEQ COUNT KBYTES 22:12:57 vdb 0 99 193 772 22:12:58 vdb 0 100 1119 4476 22:12:59 vdb 0 100 1126 4504 22:13:00 vdb 0 100 1009 4036 22:13:01 vdb 0 100 958 3832 22:13:02 vdb 0 99 957 3856 22:13:03 vdb 0 100 1130 4520 22:13:04 vdb 0 100 1051 4204 22:13:05 vdb 0 100 1158 4632 [...] USAGE message: Show block device I/O pattern. positional arguments: interval Output interval in seconds count Number of outputs optional arguments: -h, --help show this help message and exit -d DISK, --disk DISK Trace this disk only examples: ./biopattern # show block device I/O pattern. ./biopattern 1 10 # print 1 second summaries, 10 times ./biopattern -d sdb # show sdb only