wrbuf_printf(c->wrbuf, "<idle>%d</idle>\n", stat.num_idle);
wrbuf_printf(c->wrbuf, "<failed>%d</failed>\n", stat.num_failed);
wrbuf_printf(c->wrbuf, "<error>%d</error>\n", stat.num_error);
wrbuf_printf(c->wrbuf, "<idle>%d</idle>\n", stat.num_idle);
wrbuf_printf(c->wrbuf, "<failed>%d</failed>\n", stat.num_failed);
wrbuf_printf(c->wrbuf, "<error>%d</error>\n", stat.num_error);