svn commit: r265792 - head/sys/kern
Slawa Olhovchenkov
slw at zxy.spb.ru
Tue Aug 26 22:21:35 UTC 2014
On Tue, Aug 26, 2014 at 03:05:41PM -0700, Adrian Chadd wrote:
> This to me reads like "we need to fix pmc's locking so it's not so
> terrible on multi-multi-core-machines." :)
I am may be wrong, but I don't see in pmc interrupt path.
May be this is need fix too?
> On 26 August 2014 11:54, Slawa Olhovchenkov <slw at zxy.spb.ru> wrote:
> > On Tue, May 20, 2014 at 09:04:25AM -0700, Adrian Chadd wrote:
> >
> >> On 20 May 2014 08:41, Slawa Olhovchenkov <slw at zxy.spb.ru> wrote:
> >>
> >> >> (But if you try it on 10.0 and it changes things, by all means let me know.)
> >> >
> >> > I am try on 10.0, but not sure about significant improvement (may be
> >> > 10%).
> >> >
> >> > For current CPU (E5-2650 v2 @ 2.60GHz) hwpmc don't working (1. after
> >> > collect some data `pmcstat -R sample.out -G out.txt` don't decode any;
> >> > 2. kldunload hwpmc do kernel crash) and I can't collect detailed
> >> > profile information.
> >>
> >> Yup. I'm starting to get really ticked off at how pmc logging on
> >> multi-core devices just "stops" after a while. I'll talk with other
> >> pmc people and see if we can figure out what the heck is going on. :(
> >
> > Now I can test you work on CPU w/ working pmc.
> > Current traffic 16.8 Gbit/s.
> > CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz (2000.04-MHz K8-class CPU)
> >
> > last pid: 22677; load averages: 9.12, 9.07, 8.90 up 0+04:06:06 22:52:57
> > 47 processes: 3 running, 44 sleeping
> > CPU 0: 11.8% user, 0.0% nice, 43.1% system, 1.6% interrupt, 43.5% idle
> > CPU 1: 11.4% user, 0.0% nice, 51.8% system, 0.0% interrupt, 36.9% idle
> > CPU 2: 10.6% user, 0.0% nice, 46.3% system, 0.8% interrupt, 42.4% idle
> > CPU 3: 11.8% user, 0.0% nice, 45.1% system, 0.4% interrupt, 42.7% idle
> > CPU 4: 13.7% user, 0.0% nice, 43.1% system, 0.0% interrupt, 43.1% idle
> > CPU 5: 14.5% user, 0.0% nice, 45.9% system, 0.4% interrupt, 39.2% idle
> > CPU 6: 0.0% user, 0.0% nice, 5.5% system, 68.6% interrupt, 25.9% idle
> > CPU 7: 0.0% user, 0.0% nice, 4.3% system, 70.2% interrupt, 25.5% idle
> > CPU 8: 0.0% user, 0.0% nice, 2.7% system, 69.4% interrupt, 27.8% idle
> > CPU 9: 0.0% user, 0.0% nice, 4.7% system, 67.1% interrupt, 28.2% idle
> > CPU 10: 0.0% user, 0.0% nice, 3.1% system, 76.9% interrupt, 20.0% idle
> > CPU 11: 0.0% user, 0.0% nice, 5.1% system, 58.8% interrupt, 36.1% idle
> > Mem: 322M Active, 15G Inact, 96G Wired, 956K Cache, 13G Free
> > ARC: 90G Total, 84G MFU, 5690M MRU, 45M Anon, 394M Header, 98M Other
> > Swap:
> >
> >
> >
> > @ CPU_CLK_UNHALTED_CORE [241440 samples]
> >
> > 10.59% [25561] _mtx_lock_spin_cookie @ /boot/kernel/kernel
> > 94.25% [24092] pmclog_reserve @ /boot/kernel/hwpmc.ko
> > 100.0% [24092] pmclog_process_callchain
> > 100.0% [24092] pmc_process_samples
> > 100.0% [24092] pmc_hook_handler
> > 100.0% [24092] hardclock_cnt @ /boot/kernel/kernel
> > 100.0% [24092] handleevents
> > 99.62% [24001] timercb
> > 100.0% [24001] lapic_handle_timer
> > 00.38% [91] cpu_activeclock
> > 100.0% [91] cpu_idle
> > 100.0% [91] sched_idletd
> > 100.0% [91] fork_exit
> > 03.04% [777] callout_lock
> > 91.63% [712] callout_reset_sbt_on
> > 98.60% [702] tcp_timer_activate
> > 94.87% [666] tcp_do_segment
> > 100.0% [666] tcp_input
> > 100.0% [666] ip_input
> > 100.0% [666] netisr_dispatch_src
> > 100.0% [666] ether_demux
> > 100.0% [666] ether_nh_input
> > 100.0% [666] netisr_dispatch_src
> > 98.05% [653] ixgbe_rxeof @ /boot/kernel/if_ixgbe.ko
> > 87.44% [571] ixgbe_msix_que
> > 100.0% [571] intr_event_execute_handlers @ /boot/kernel/kernel
> > 100.0% [571] ithread_loop
> > 100.0% [571] fork_exit
> > 12.56% [82] ixgbe_handle_que @ /boot/kernel/if_ixgbe.ko
> > 100.0% [82] taskqueue_run_locked @ /boot/kernel/kernel
> > 100.0% [82] taskqueue_thread_loop
> > 100.0% [82] fork_exit
> > 01.95% [13] tcp_lro_flush
> > 92.31% [12] ixgbe_rxeof @ /boot/kernel/if_ixgbe.ko
> > 100.0% [12] ixgbe_msix_que
> > 100.0% [12] intr_event_execute_handlers @ /boot/kernel/kernel
> > 100.0% [12] ithread_loop
> > 07.69% [1] tcp_lro_rx
> > 100.0% [1] ixgbe_rxeof @ /boot/kernel/if_ixgbe.ko
> > 100.0% [1] ixgbe_msix_que
> > 100.0% [1] intr_event_execute_handlers @ /boot/kernel/kernel
> > 05.13% [36] tcp_output
> > 100.0% [36] tcp_do_segment
> > 100.0% [36] tcp_input
> > 100.0% [36] ip_input
> > 100.0% [36] netisr_dispatch_src
> > 100.0% [36] ether_demux
> > 100.0% [36] ether_nh_input
> > 100.0% [36] netisr_dispatch_src
> > 100.0% [36] ixgbe_rxeof @ /boot/kernel/if_ixgbe.ko
> > 91.67% [33] ixgbe_msix_que
> > 100.0% [33] intr_event_execute_handlers @ /boot/kernel/kernel
> > 100.0% [33] ithread_loop
> > 08.33% [3] ixgbe_handle_que @ /boot/kernel/if_ixgbe.ko
> > 100.0% [3] taskqueue_run_locked @ /boot/kernel/kernel
> > 100.0% [3] taskqueue_thread_loop
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