On Fri, Sep 16, 2016 at 12:11:55PM -0700, hiren panchasara wrote: > + jch@ > On 09/16/16 at 10:03P, Slawa Olhovchenkov wrote: > > On Fri, Sep 16, 2016 at 11:30:53AM -0700, hiren panchasara wrote: > > > > > On 09/16/16 at 09:18P, Slawa Olhovchenkov wrote: > > > > On Thu, Sep 15, 2016 at 12:06:33PM +0300, Slawa Olhovchenkov wrote: > > > > > > > > > On Thu, Sep 15, 2016 at 11:59:38AM +0300, Konstantin Belousov wrote: > > > > > > > > > > > On Thu, Sep 15, 2016 at 12:35:04AM +0300, Slawa Olhovchenkov wrote: > > > > > > > On Sun, Sep 04, 2016 at 06:46:12PM -0700, hiren panchasara wrote: > > > > > > > > > > > > > > > On 09/05/16 at 12:57P, Slawa Olhovchenkov wrote: > > > > > > > > > I am try using 11.0 on Dual E5-2620 (no X2APIC). > > > > > > > > > Under high network load and may be addtional conditional > > > > > > > > > system go to > > > > > > > > > unresponsible state -- no reaction to network and console > > > > > > > > > (USB IPMI > > > > > > > > > emulation). INVARIANTS give to high overhad. Is this exist > > > > > > > > > some way to > > > > > > > > > debug this? > > > > > > > > > > > > > > > > Can you panic it from console to get to db> to get backtrace > > > > > > > > and other > > > > > > > > info when it goes unresponsive? > > > > > > > > > > > > > > ipmi console don't respond (chassis power diag don't react) > > > > > > > login on sol console stuck on *tcp. > > > > > > > > > > > > Is 'login' you reference is the ipmi client state, or you mean > > > > > > login(1) > > > > > > on the wedged host ? > > > > > > > > > > on the wedged host > > > > > > > > > > > If BMC stops responding simultaneously with the host, I would > > > > > > suspect > > > > > > the hardware platform issues instead of a software problem. Do you > > > > > > have > > > > > > dedicated LAN port for BMC ? > > > > > > > > > > Yes. > > > > > But BMC emulate USB keyboard and this is may be lock inside USB > > > > > system. > > > > > "ipmi console don't respond" must be read as "ipmi console runnnig and > > > > > attached but system don't react to keypress on this console". > > > > > at the sime moment system respon to `enter` on ipmi sol console, but > > > > > after enter `root` stuck in login in the '*tcp' state (I think this is > > > > > NIS related). > > > > > > > > ~^B don't break to debuger. > > > > But I can login to sol console. > > > > > > You can probably: > > > debug.kdb.enter: set to enter the debugger > > > > > > or force a panic and get vmcore: > > > debug.kdb.panic: set to panic the kernel > > > > I am reset this host. > > PMC samples collected and decoded: > > > > @ CPU_CLK_UNHALTED_CORE [4653445 samples] > > > > 51.86% [2413083] lock_delay @ /boot/kernel.VSTREAM/kernel > > 100.0% [2413083] __rw_wlock_hard > > 100.0% [2413083] tcp_tw_2msl_scan > > 99.99% [2412958] pfslowtimo > > 100.0% [2412958] softclock_call_cc > > 100.0% [2412958] softclock > > 100.0% [2412958] intr_event_execute_handlers > > 100.0% [2412958] ithread_loop > > 100.0% [2412958] fork_exit > > 00.01% [125] tcp_twstart > > 100.0% [125] tcp_do_segment > > 100.0% [125] tcp_input > > 100.0% [125] ip_input > > 100.0% [125] swi_net > > 100.0% [125] intr_event_execute_handlers > > 100.0% [125] ithread_loop > > 100.0% [125] fork_exit > > > > 09.43% [438774] _rw_runlock_cookie @ /boot/kernel.VSTREAM/kernel > > 100.0% [438774] tcp_tw_2msl_scan > > 99.99% [438735] pfslowtimo > > 100.0% [438735] softclock_call_cc > > 100.0% [438735] softclock > > 100.0% [438735] intr_event_execute_handlers > > 100.0% [438735] ithread_loop > > 100.0% [438735] fork_exit > > 00.01% [39] tcp_twstart > > 100.0% [39] tcp_do_segment > > 100.0% [39] tcp_input > > 100.0% [39] ip_input > > 100.0% [39] swi_net > > 100.0% [39] intr_event_execute_handlers > > 100.0% [39] ithread_loop > > 100.0% [39] fork_exit > > > > 08.57% [398970] __rw_wlock_hard @ /boot/kernel.VSTREAM/kernel > > 100.0% [398970] tcp_tw_2msl_scan > > 99.99% [398940] pfslowtimo > > 100.0% [398940] softclock_call_cc > > 100.0% [398940] softclock > > 100.0% [398940] intr_event_execute_handlers > > 100.0% [398940] ithread_loop > > 100.0% [398940] fork_exit > > 00.01% [30] tcp_twstart > > 100.0% [30] tcp_do_segment > > 100.0% [30] tcp_input > > 100.0% [30] ip_input > > 100.0% [30] swi_net > > 100.0% [30] intr_event_execute_handlers > > 100.0% [30] ithread_loop > > 100.0% [30] fork_exit > > > > 05.79% [269224] __rw_try_rlock @ /boot/kernel.VSTREAM/kernel > > 100.0% [269224] tcp_tw_2msl_scan > > 99.99% [269203] pfslowtimo > > 100.0% [269203] softclock_call_cc > > 100.0% [269203] softclock > > 100.0% [269203] intr_event_execute_handlers > > 100.0% [269203] ithread_loop > > 100.0% [269203] fork_exit > > 00.01% [21] tcp_twstart > > 100.0% [21] tcp_do_segment > > 100.0% [21] tcp_input > > 100.0% [21] ip_input > > 100.0% [21] swi_net > > 100.0% [21] intr_event_execute_handlers > > 100.0% [21] ithread_loop > > 100.0% [21] fork_exit > > > > 05.35% [249141] _rw_wlock_cookie @ /boot/kernel.VSTREAM/kernel > > 99.76% [248543] tcp_tw_2msl_scan > > 99.99% [248528] pfslowtimo > > 100.0% [248528] softclock_call_cc > > 100.0% [248528] softclock > > 100.0% [248528] intr_event_execute_handlers > > 100.0% [248528] ithread_loop > > 100.0% [248528] fork_exit > > 00.01% [15] tcp_twstart > > 100.0% [15] tcp_do_segment > > 100.0% [15] tcp_input > > 100.0% [15] ip_input > > 100.0% [15] swi_net > > 100.0% [15] intr_event_execute_handlers > > 100.0% [15] ithread_loop > > 100.0% [15] fork_exit > > 00.24% [598] pfslowtimo > > 100.0% [598] softclock_call_cc > > 100.0% [598] softclock > > 100.0% [598] intr_event_execute_handlers > > 100.0% [598] ithread_loop > > 100.0% [598] fork_exit > > > > As I suspected, this looks like a hang trying to lock V_tcbinfo. > > I'm ccing Julien here who worked on WLOCK -> RLOCK transition to improve > performance for short-lived connections. I am not too sure if thats the > problem but looks in similar area so he may be able to provide some > insights.
I am point to tcp_tw_2msl_scan. I am expect traveling by list V_twq_2msl. But I am see only endless attempt to lock first element from this list. Is this correct? _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
