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 > >>>>> | | | 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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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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 -- Informationstechnologie Berlin-Brandenburgische Akademie der Wissenschaften Jägerstraße 22-23 10117 Berlin Tel.: +49 30 20370-352 http://www.bbaw.de _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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