gistfile1.txt

global tids
global bytecount
global exes

probe syscall.read {
    exes[tid()] = execname();
    tids[tid()] = fd;
}

probe syscall.read.return {
    t = tid()
    if (t in tids) {
        fd = tids[t];
        if (!([t, fd] in bytecount))
            bytecount[t, fd] = 0;
        bytecount[t, fd] += strtol(retstr, 10);
        delete tids[t];
    }
}
    
probe timer.ms(%d) {
    foreach ([t, fd] in bytecount)
        printf("%%d %%d %%s %%d\\n", t, fd, exes[t], bytecount[t, fd]);
    exit();
}