Anybody upgraded to 14.2.6 yet? On a 1800 OSD cluster I see that ceph-mgr is consuming 200 to 450% CPU on a 4C/8T system (Intel Xeon E3-1230 3.3Ghz CPU). The logs don't show anything very special, it's just that the mgr is super busy. I noticed this when I executed: $ ceph balancer status That command wouldn't return and then I checked the mgr. Only after restarting ceph-mgr the balancer module returned results again. It didn't change the CPU usage, it's still consuming a lot of CPU, but at least the balancer seems to work again. Wido On 1/9/20 10:21 AM, Lars Täuber wrote: > yesterday: > https://ceph.io/releases/v14-2-6-nautilus-released/ > > > Cheers, > Lars > > Thu, 9 Jan 2020 10:10:12 +0100 > Wido den Hollander <wido@xxxxxxxx> ==> Neha Ojha <nojha@xxxxxxxxxx>, Sasha Litvak <alexander.v.litvak@xxxxxxxxx> : >> On 12/24/19 9:19 PM, Neha Ojha wrote: >>> The root cause of this issue is the overhead added by the network ping >>> time monitoring feature for the mgr to process. >>> We have a fix that disables sending the network ping times related >>> stats to the mgr and Eric has helped verify the fix(Thanks Eric!) - >>> https://tracker.ceph.com/issues/43364#note-9. We'll get this fix out >>> in 14.2.6 after the holidays. >>> >> >> It's after the holidays now and this is affecting a lot of deployments. >> Can people expect 14.2.6 soon? >> >> Wido >> >>> >>> >>> On Fri, Dec 20, 2019 at 6:24 PM Neha Ojha <nojha@xxxxxxxxxx> wrote: >>>> >>>> Not yet, but we have a theory and a test build in >>>> https://tracker.ceph.com/issues/43364#note-6, if anybody would like to >>>> give it a try. >>>> >>>> Thanks, >>>> Neha >>>> >>>> On Fri, Dec 20, 2019 at 2:31 PM Sasha Litvak >>>> <alexander.v.litvak@xxxxxxxxx> wrote: >>>>> >>>>> Was the root cause found and fixed? If so, will the fix be available in 14.2.6 or sooner? >>>>> >>>>> On Thu, Dec 19, 2019 at 5:48 PM Mark Nelson <mnelson@xxxxxxxxxx> wrote: >>>>>> >>>>>> Hi Paul, >>>>>> >>>>>> >>>>>> Thanks for gathering this! It looks to me like at the very least we >>>>>> should redo the fixed_u_to_string and fixed_to_string functions in >>>>>> common/Formatter.cc. That alone looks like it's having a pretty >>>>>> significant impact. >>>>>> >>>>>> >>>>>> Mark >>>>>> >>>>>> >>>>>> On 12/19/19 2:09 PM, Paul Mezzanini wrote: >>>>>>> Based on what we've seen with perf, we think this is the relevant section. (attached is also the whole file) >>>>>>> >>>>>>> Thread: 73 (mgr-fin) - 1000 samples >>>>>>> >>>>>>> + 100.00% clone >>>>>>> + 100.00% start_thread >>>>>>> + 100.00% Finisher::finisher_thread_entry() >>>>>>> + 99.40% Context::complete(int) >>>>>>> | + 99.40% FunctionContext::finish(int) >>>>>>> | + 99.40% ActivePyModule::notify(std::string const&, std::string const&) >>>>>>> | + 91.30% PyObject_CallMethod >>>>>>> | | + 91.30% call_function_tail >>>>>>> | | + 91.30% PyObject_Call >>>>>>> | | + 91.30% instancemethod_call >>>>>>> | | + 91.30% PyObject_Call >>>>>>> | | + 91.30% function_call >>>>>>> | | + 91.30% PyEval_EvalCodeEx >>>>>>> | | + 88.40% PyEval_EvalFrameEx >>>>>>> | | | + 88.40% PyEval_EvalFrameEx >>>>>>> | | | + 88.40% ceph_state_get(BaseMgrModule*, _object*) >>>>>>> | | | + 88.40% ActivePyModules::get_python(std::string const&) >>>>>>> | | | + 51.10% PGMap::dump_osd_stats(ceph::Formatter*) const >>>>>>> | | | | + 51.10% osd_stat_t::dump(ceph::Formatter*) const >>>>>>> | | | | + 22.50% ceph::fixed_u_to_string(unsigned long, int) >>>>>>> | | | | | + 10.50% std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >::basic_ostringstream(std::_Ios_Openmode) >>>>>>> | | | | | | + 9.30% std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*) >>>>>>> | | | | | | | + 7.00% std::basic_ios<char, std::char_traits<char> >::_M_cache_locale(std::locale const&) >>>>>>> | | | | | | | | + 1.60% std::ctype<char> const& std::use_facet<std::ctype<char> >(std::locale const&) >>>>>>> | | | | | | | | | + 1.50% __dynamic_cast >>>>>>> | | | | | | | | | + 0.80% __cxxabiv1::__vmi_class_type_info::__do_dyncast(long, __cxxabiv1::__class_type_info::__sub_kind, __cxxabiv1::__class_type_info const*, void const*, __cxxabiv1::__class_type_info const*, void const*, __cxxabiv1::__class_type_info::__dyncast_result&) const >>>>>>> | | | | | | | | + 1.40% bool std::has_facet<std::ctype<char> >(std::locale const&) >>>>>>> | | | 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std::use_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&) >>>>>>> | | | | | | | | + 0.70% std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > const& std::use_facet<std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&) >>>>>>> | | | | | | | | + 0.10% _ZSt9has_facetISt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEEEbRKSt6locale@plt >>>>>>> | | | | | | | + 2.00% std::ios_base::_M_init() >>>>>>> | | | | | | | | + 0.80% std::locale::operator=(std::locale const&) >>>>>>> | | | | | | | | + 0.80% std::locale::locale() >>>>>>> | | | | | | | | + 0.30% std::locale::~locale() >>>>>>> | | | | | | | | + 0.10% _ZNSt6localeC1Ev@plt >>>>>>> | | | | | | | + 0.20% _ZNSt8ios_base7_M_initEv@plt >>>>>>> | | | | | | + 0.90% std::locale::locale() >>>>>>> | | | | | | + 0.10% std::ios_base::ios_base() >>>>>>> | | | | | | + 0.10% 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const&, std::forward_iterator_tag) [clone .part.1796] >>>>>>> | | | | | + 1.50% std::string::append(char const*, unsigned long) >>>>>>> | | | | | | + 1.20% std::string::reserve(unsigned long) >>>>>>> | | | | | | + 0.60% std::string::_Rep::_M_clone(std::allocator<char> const&, unsigned long) >>>>>>> | | | | | | + 0.10% tc_free >>>>>>> | | | | | + 1.20% std::string::_Rep::_M_dispose(std::allocator<char> const&) [clone .isra.97] [clone .part.98] >>>>>>> | | | | | + 1.00% std::string::append(std::string const&) >>>>>>> | | | | | | + 0.70% std::string::reserve(unsigned long) >>>>>>> | | | | | | + 0.10% __memcpy_ssse3_back >>>>>>> | | | | | + 1.00% std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&, unsigned long, unsigned long) >>>>>>> | | | | | | + 0.80% char* std::string::_S_construct<char*>(char*, char*, std::allocator<char> const&, std::forward_iterator_tag) [clone .part.220] >>>>>>> | | | | | + 0.40% std::locale::~locale() >>>>>>> | 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std::_List_base<std::shared_ptr<PyFormatter::PendingStream>, std::allocator<std::shared_ptr<PyFormatter::PendingStream> > >::_M_clear() >>>>>>> | | | | | + 0.40% std::_Sp_counted_ptr_inplace<PyFormatter::PendingStream, std::allocator<PyFormatter::PendingStream>, (__gnu_cxx::_Lock_policy)2>::_M_dispose() >>>>>>> | | | | | + 0.20% tcmalloc::ThreadCache::ListTooLong(tcmalloc::ThreadCache::FreeList*, unsigned int) >>>>>>> | | | | + 0.70% PyFormatter::dump_pyobject(char const*, _object*) >>>>>>> | | | | + 0.50% std::string::replace(unsigned long, unsigned long, char const*, unsigned long) >>>>>>> | | | | + 0.30% PyString_FromString >>>>>>> | | | + 1.10% PyEval_RestoreThread >>>>>>> | | | + 1.10% PyThread_acquire_lock >>>>>>> | | | + 1.10% sem_wait@@GLIBC_2.2.5 >>>>>>> | | | + 1.10% __new_sem_wait_slow.constprop.0 >>>>>>> | | | + 1.10% do_futex_wait.constprop.1 >>>>>>> | | + 2.90% frame_dealloc >>>>>>> | | + 2.90% dict_dealloc >>>>>>> | | + 2.90% list_dealloc >>>>>>> | | + 2.90% dict_dealloc >>>>>>> | | + 1.90% list_dealloc >>>>>>> | | | + 1.90% dict_dealloc >>>>>>> | | | + 1.70% list_dealloc >>>>>>> | | | + 1.50% dict_dealloc >>>>>>> | | | | + 0.90% dict_dealloc >>>>>>> | | | | + 0.10% PyObject_Free >>>>>>> | | | + 0.10% tcmalloc::ThreadCache::ListTooLong(tcmalloc::ThreadCache::FreeList*, unsigned int) >>>>>>> | | + 0.30% PyObject_Free >>>>>>> | | + 0.20% dict_dealloc >>>>>>> | + 8.10% Gil::Gil(SafeThreadState&, bool) >>>>>>> | + 8.10% PyEval_RestoreThread >>>>>>> | + 8.10% PyThread_acquire_lock >>>>>>> | + 8.10% sem_wait@@GLIBC_2.2.5 >>>>>>> | + 8.10% __new_sem_wait_slow.constprop.0 >>>>>>> | + 8.10% do_futex_wait.constprop.1 >>>>>>> + 0.60% std::condition_variable::wait(std::unique_lock<std::mutex>&) >>>>>>> >>>>>>> -- >>>>>>> Paul Mezzanini >>>>>>> Sr Systems Administrator / Engineer, Research Computing >>>>>>> Information & Technology Services >>>>>>> Finance & Administration >>>>>>> Rochester Institute of Technology >>>>>>> o:(585) 475-3245 | pfmeec@xxxxxxx >>>>>>> >>>>>>> CONFIDENTIALITY NOTE: The information transmitted, including attachments, is >>>>>>> intended only for the person(s) or entity to which it is addressed and may >>>>>>> contain confidential and/or privileged material. Any review, retransmission, >>>>>>> dissemination or other use of, or taking of any action in reliance upon this >>>>>>> information by persons or entities other than the intended recipient is >>>>>>> prohibited. If you received this in error, please contact the sender and >>>>>>> destroy any copies of this information. >>>>>>> ------------------------ >>>>>>> >>>>>>> ________________________________________ >>>>>>> From: Mark Nelson <mnelson@xxxxxxxxxx> >>>>>>> Sent: Thursday, December 19, 2019 11:47 AM >>>>>>> To: ceph-users@xxxxxxx >>>>>>> Subject: Re: High CPU usage by ceph-mgr in 14.2.5 >>>>>>> >>>>>>> If you can get a wallclock profiler on the mgr process we might be able >>>>>>> to figure out specifics of what's taking so much time (ie processing >>>>>>> pg_summary or something else). Assuming you have gdb with the python >>>>>>> bindings and the ceph debug packages installed, if you (are anyone) >>>>>>> could try gdbpmp on the 100% mgr process that would be fantastic. >>>>>>> >>>>>>> >>>>>>> https://github.com/markhpc/gdbpmp >>>>>>> >>>>>>> >>>>>>> gdbpmp.py -p`pidof ceph-mgr` -n 1000 -o mgr.gdbpmp >>>>>>> >>>>>>> >>>>>>> If you want to view the results: >>>>>>> >>>>>>> >>>>>>> gdbpmp.py -i mgr.gdbpmp -t 1 >>>>>>> >>>>>>> >>>>>>> Thanks, >>>>>>> >>>>>>> Mark >>>>>>> >>>>>>> >>>>>>> On 12/19/19 6:29 AM, Paul Emmerich wrote: >>>>>>>> We're also seeing unusually high mgr CPU usage on some setups, the >>>>>>>> only thing they have in common seem to > 300 OSDs. >>>>>>>> >>>>>>>> Threads using the CPU are "mgr-fin" and and "ms_dispatch" >>>>>>>> >>>>>>>> >>>>>>>> Paul >>>>>>>> >>>>>>>> -- >>>>>>>> Paul Emmerich >>>>>>>> >>>>>>>> Looking for help with your Ceph cluster? Contact us at https://croit.io >>>>>>>> >>>>>>>> croit GmbH >>>>>>>> Freseniusstr. 31h >>>>>>>> 81247 München >>>>>>>> www.croit.io <http://www.croit.io> >>>>>>>> Tel: +49 89 1896585 90 >>>>>>>> >>>>>>>> >>>>>>>> On Thu, Dec 19, 2019 at 9:40 AM Serkan Çoban <cobanserkan@xxxxxxxxx >>>>>>>> <mailto:cobanserkan@xxxxxxxxx>> wrote: >>>>>>>> >>>>>>>> +1 >>>>>>>> 1500 OSDs, mgr is constant %100 after upgrading from 14.2.2 to 14.2.5. >>>>>>>> >>>>>>>> On Thu, Dec 19, 2019 at 11:06 AM Toby Darling >>>>>>>> <toby@xxxxxxxxxxxxxxxxx <mailto:toby@xxxxxxxxxxxxxxxxx>> wrote: >>>>>>>> > >>>>>>>> > On 18/12/2019 22:40, Bryan Stillwell wrote: >>>>>>>> > > That's how we noticed it too. Our graphs went silent after >>>>>>>> the upgrade >>>>>>>> > > completed. Is your large cluster over 350 OSDs? >>>>>>>> > >>>>>>>> > A 'me too' on this - graphs have gone quiet, and mgr is using >>>>>>>> 100% CPU. >>>>>>>> > This happened when we grew our 14.2.5 cluster from 328 to 436 OSDs. >>>>>>>> > >>>>>>>> > Cheers >>>>>>>> > Toby >>>>>>>> > -- >>>>>>>> > Toby Darling, Scientific Computing (2N249) >>>>>>>> > MRC Laboratory of Molecular Biology >>>>>>>> > Francis Crick Avenue >>>>>>>> > Cambridge Biomedical Campus >>>>>>>> > Cambridge CB2 0QH >>>>>>>> > Phone 01223 267070 >>>>>>>> > _______________________________________________ >>>>>>>> > ceph-users mailing list -- ceph-users@xxxxxxx >>>>>>>> <mailto:ceph-users@xxxxxxx> >>>>>>>> > To unsubscribe send an email to ceph-users-leave@xxxxxxx >>>>>>>> <mailto:ceph-users-leave@xxxxxxx> >>>>>>>> _______________________________________________ >>>>>>>> ceph-users mailing list -- ceph-users@xxxxxxx >>>>>>>> <mailto:ceph-users@xxxxxxx> >>>>>>>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>>>>>>> <mailto:ceph-users-leave@xxxxxxx> >>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> ceph-users mailing list -- ceph-users@xxxxxxx >>>>>>>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>>>>>> _______________________________________________ >>>>>>> ceph-users mailing list -- ceph-users@xxxxxxx >>>>>>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>>>>> _______________________________________________ >>>>>> ceph-users mailing list -- ceph-users@xxxxxxx >>>>>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>>>> >>>>> _______________________________________________ >>>>> ceph-users mailing list -- ceph-users@xxxxxxx >>>>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>> _______________________________________________ >>> ceph-users mailing list -- ceph-users@xxxxxxx >>> To unsubscribe send an email to ceph-users-leave@xxxxxxx >>> >> _______________________________________________ >> ceph-users mailing list -- ceph-users@xxxxxxx >> To unsubscribe send an email to ceph-users-leave@xxxxxxx > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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