Ingo Molnar wrote: > * Anant Nitya <[EMAIL PROTECTED]> wrote: > > >>I am posting links to the information you asked for. One more thing, >>after digging a bit more I found its QoS shaping that is making the >>box crawl. Once I disabled the traffic shaping everything comes back >>to smooth and normal. Shaping being done on very low speed residential >>ADSL 256/64 Kbps connection. If you want me to post shaping rules, >>please free to ask. BTW its a simple HTB/SFQ rules. > > [...] > >>http://cybertek.info/taitai/trace-to-ingo.txt.bz2 > > > thanks! This trace indeed includes the smoking gun, htb_dequeue() and > __qdisc_run(): > > privoxy-12926 1.Ns1 1597us : rb_first (htb_dequeue) > > this goes on, non-preemptible, for 160 milliseconds (!): > > privoxy-12926 1.Ns1 161568us : rb_first (htb_dequeue) > privoxy-12926 1.Ns1 161568us : qdisc_watchdog_schedule (htb_dequeue) > > and finally manages to escape the loop: > > privoxy-12926 1.Ns1 161597us : rb_first (htb_dequeue) > privoxy-12926 1.Ns1 161597us : rb_first (htb_dequeue) > privoxy-12926 1.Ns1 161599us : htb_safe_rb_erase (htb_dequeue) > privoxy-12926 1.Ns1 161599us : rb_erase (htb_safe_rb_erase) > privoxy-12926 1.Ns1 161600us : htb_change_class_mode (htb_dequeue) > privoxy-12926 1.Ns1 161601us : htb_activate_prios (htb_change_class_mode) > > and the system recovers. > > David, any ideas about what's wrong with htb_dequeue(), based on this > trace?
This looks like fallout from the switch to hrtimers. Anant, please send me your HTB script, I'll try to reproduce it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
