Provided by: bpftrace_0.14.0-1_amd64
bitesize.bt - Show disk I/O size as a histogram. Uses bpftrace/eBPF.
This can be used to characterize the distribution of block device (disk) I/O sizes. To study block device I/O in more detail, see biosnoop(8). This uses the tracepoint:block:block_rq_issue tracepoint, and is a simple example of bpftrace. Since this uses BPF, only the root user can use this tool.
CONFIG_BPF and bpftrace.
Trace block I/O and summarize as a histogram by process: # bitesize.bt
0th A process name (shown in "@[...]") is printed before each I/O histogram. 1st, 2nd This is a range of I/O sizes, in Kbytes (shown in "[...)" set notation). 3rd A column showing the count of I/O in this range. 4th This is an ASCII histogram representing the count column.
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.
This is from bpftrace. https://github.com/iovisor/bpftrace Also look in the bpftrace distribution for a companion _examples.txt file containing example usage, output, and commentary for this tool. This is a bpftrace version of the bcc tool of the same name. https://github.com/iovisor/bcc
Unstable - in development.