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#!/usr/bin/env bpftrace
/*
* bitesize Show disk I/O size as a histogram.
* For Linux, uses bpftrace and eBPF.
*
* USAGE: bitesize.bt
*
* This is a bpftrace version of the bcc tool of the same name.
*
* Copyright 2018 Netflix, Inc.
* Licensed under the Apache License, Version 2.0 (the "License")
*
* 07-Sep-2018 Brendan Gregg Created this.
*/
BEGIN
{
printf("Tracing block device I/O... Hit Ctrl-C to end.\n");
}
tracepoint:block:block_rq_issue
{
@[args.comm] = hist(args.bytes);
}
END
{
printf("\nI/O size (bytes) histograms by process name:");
}