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) >> > | | | | 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| | | | | | + 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% _ZNSt9basic_iosIcSt11char_traitsIcEE4initEPSt15basic_streambufIcS1_E@plt >> > | | | | | + 2.80% std::ostream& std::ostream::_M_insert<unsigned long>(unsigned long) >> > | | | | | | + 2.40% std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::do_put(std::ostreambuf_iterator<char, std::char_traits<char> >, std::ios_base&, char, unsigned long) const >> > | | | | | | | + 2.10% std::ostreambuf_iterator<char, std::char_traits<char> > std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::_M_insert_int<unsigned long>(std::ostreambuf_iterator<char, std::char_traits<char> >, std::ios_base&, char, unsigned long) const >> > | | | | | | | | + 1.60% std::basic_streambuf<char, std::char_traits<char> >::xsputn(char const*, long) >> > | | | | | | | | | + 1.40% std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::overflow(int) >> > | | | | | | | | | | + 0.90% std::string::reserve(unsigned long) >> > | | | | | | | | | | + 0.10% std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::_M_sync(char*, unsigned long, unsigned long) >> > | | | | | | | | | | + 0.10% 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| | | | + 1.60% collect >> > | | | | | | | + 0.80% dict_traverse >> > | | | | | | | + 0.10% subtype_traverse >> > | | | | | | | + 0.10% list_traverse >> > | | | | | | | + 0.10% func_traverse >> > | | | | | | | + 0.10% _PyDict_MaybeUntrack >> > | | | | | | + 0.20% PyFormatter::dump_pyobject(char const*, _object*) >> > | | | | | + 1.70% utime_t::localtime(std::ostream&) const >> > | | | | | | + 1.00% std::ostream& std::ostream::_M_insert<long>(long) >> > | | | | | | | + 0.60% std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::do_put(std::ostreambuf_iterator<char, std::char_traits<char> >, std::ios_base&, char, long) const >> > | | | | | | + 0.30% std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, long) >> > | | | | | | + 0.20% __tz_convert >> > | | | | | + 0.90% PyFormatter::dump_pyobject(char const*, _object*) >> > | | | | | + 0.20% pg_state_string(unsigned long) >> > | | | | | + 0.20% operator<<(std::ostream&, eversion_t const&) [clone .isra.103] >> > | | | | | + 0.10% std::ostream& std::ostream::_M_insert<unsigned long>(unsigned long) >> > | | | | + 0.40% PyFormatter::dump_stream(char const*) >> > | | | | + 0.30% operator<<(std::ostream&, pg_t const&) >> > | | | | + 0.10% PyFormatter::open_object_section(char const*) >> > | | | + 2.70% PyFormatter::finish_pending_streams() >> > | | | | + 1.00% 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
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