round_trip-micro-glibc.bt

#!/usr/bin/env bpftrace

BEGIN
{
    printf("Hit Ctrl-C to end.\n");
    //@first = 1;
}

END
{
    clear(@follow);
    clear(@name);
}

uprobe:libc:read,
uprobe:libc:write,
uprobe:libc:open,
uprobe:libc:close
/pid == $1/
{
    @follow[tid] = nsecs;
    //printf("[%ld][%s]%s\n", pid, comm, func);
    @name[tid] = func;
    @event_count[tid, func] = count();

    //if(@first){
    //    printf("read: %X\n", uaddr("read"));
    //    printf("write: %X\n", uaddr("write"));
    //    printf("open: %X\n", uaddr("open"));
    //    printf("close: %X\n", uaddr("close"));
    //    delete(@first);
    //}
}

uretprobe:libc:read,
uretprobe:libc:write,
uretprobe:libc:open,
uretprobe:libc:close
/pid == $1 && @follow[tid]/
{
    $total_us = nsecs - @follow[tid];
    //@trip_us[@name[tid]] = lhist($total_us, 0, 1000, 1);
    @total_ns[tid, func, @event_count[tid, @name[tid]]] = $total_us;
    printf("%ld\n", @total_ns[tid, func, @event_count[tid, @name[tid]]]);
    print(@total_ns);
    delete(@follow[tid]);
    delete(@name[tid]);
}

//interval:s:30
//{
//    printf("\n");
//    print(@trip_us);
//    printf("\n");
//}