biopattern - Identify random/sequential disk access patterns.

       Rocky Xing

       This  traces  block device I/O (disk I/O), and prints ratio of random/sequential I/O for each disk or the
       specified disk either on Ctrl-C, or after a given interval in seconds.

       This works by tracing kernel tracepoint block:block_rq_complete.

       Since this uses BPF, only the root user can use this tool.

       Trace access patterns of all disks, and print a summary on Ctrl-C:
              # biopattern

       Trace disk sdb only:
              # biopattern-dsdb

       Print 1 second summaries, 10 times:
              # biopattern110

       TIME   Time of the output, in HH:MM:SS format.

       DISK   Disk device name.

       %RND   Ratio of random I/O.

       %SEQ   Ratio of sequential I/O.

       COUNT  Number of I/O during the interval.

       KBYTES Total Kbytes for these I/O, during the interval.

       biopattern - Identify random/sequential disk access patterns.

       -h     Show help message and exit.

       -d     Trace this disk only.

       interval
              Print output every interval seconds, if any.

       count  Number of interval summaries.

       Linux

       Since block device I/O usually has a relatively low frequency (< 10,000/s), the overhead for this tool is
       expected to be low or negligible. For high IOPS storage systems, test and quantify before use.

       CONFIG_BPF and bcc.

biosnoop(8), biolatency(8), iostat(1)

USER COMMANDS                                      2022-02-21                                      biopattern(8)

       This is from bcc.

              https://github.com/iovisor/bcc

       Also look in the bcc distribution for a companion _examples.txt file containing  example  usage,  output,
       and commentary for this tool.

       Unstable - in development.

biopattern[-h][-dDISK][interval][count]