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View File Name : naptime.bt

#!/usr/bin/env bpftrace
/*
 * naptime - Show voluntary sleep calls.
 *
 * See BPF Performance Tools, Chapter 13, for an explanation of this tool.
 *
 * Copyright (c) 2019 Brendan Gregg.
 * Licensed under the Apache License, Version 2.0 (the "License").
 * This was originally created for the BPF Performance Tools book
 * published by Addison Wesley. ISBN-13: 9780136554820
 * When copying or porting, include this comment.
 *
 * 16-Feb-2019  Brendan Gregg   Created this.
 */

#ifndef BPFTRACE_HAVE_BTF
#include <linux/time.h>
#include <linux/sched.h>
#endif

BEGIN
{
	printf("Tracing sleeps. Hit Ctrl-C to end.\n");
	printf("%-8s %-6s %-16s %-6s %-16s %s\n", "TIME", "PPID", "PCOMM",
	    "PID", "COMM", "SECONDS");
}

tracepoint:syscalls:sys_enter_nanosleep
/args.rqtp->tv_sec + args.rqtp->tv_nsec/
{
	$task = (struct task_struct *)curtask;
	time("%H:%M:%S ");
	printf("%-6d %-16s %-6d %-16s %d.%03d\n", $task->real_parent->pid,
	    $task->real_parent->comm, pid, comm,
	    args.rqtp->tv_sec, (uint64)args.rqtp->tv_nsec / 1e6);
}