add this snippet

[Squirre17]

void bind_cpu(int cpu_nr) {
    cpu_set_t cset;
    CPU_ZERO(&cset);
    CPU_SET(cpu_nr, &cset);
    if (sched_setaffinity(0, sizeof(cpu_set_t), &cset))
        panic("sched_setaffinity: %d", cpu_nr);
}

and this

void hexdump(const void *data, size_t size) {
    char ascii[17];
    size_t i, j;
    ascii[16] = '\0';
    for (i = 0; i < size; ++i) {
        dprintf(2, "%02X ", ((unsigned char *)data)[i]);
        if (((unsigned char *)data)[i] >= ' ' &&
            ((unsigned char *)data)[i] <= '~') {
            ascii[i % 16] = ((unsigned char *)data)[i];
        } else {
            ascii[i % 16] = '.';
        }
        if ((i + 1) % 8 == 0 || i + 1 == size) {
            dprintf(2, " ");
            if ((i + 1) % 16 == 0) {
                dprintf(2, "|  %s \n", ascii);
            } else if (i + 1 == size) {
                ascii[(i + 1) % 16] = '\0';
                if ((i + 1) % 16 <= 8) {
                    dprintf(2, " ");
                }
                for (j = (i + 1) % 16; j < 16; ++j) {
                    dprintf(2, "   ");
                }
                dprintf(2, "|  %s \n", ascii);
            }
        }
    }
}