Was the root cause found and fixed? If so, will the fix be available in 14.2.6 or sooner?
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&)
> | | | | | | | | | + 1.30% __dynamic_cast
> | | | | | | | | | + 0.90% __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
> | | | | | | | | + 1.10% bool std::has_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&)
> | | | | | | | | | + 0.90% __dynamic_cast
> | | | | | | | | + 1.00% bool std::has_facet<std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&)
> | | | | | | | | | + 0.70% __dynamic_cast
> | | | | | | | | | + 0.10% std::locale::id::_M_id() const
> | | | | | | | | | + 0.10% _ZNKSt6locale2id5_M_idEv@plt
> | | | | | | | | + 0.80% std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > const& 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% _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% _ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEE7_M_syncEPcmm@plt
> | | | | | | | | | + 0.20% __memcpy_ssse3_back
> | | | | | | | | + 0.20% ???
> | | | | | | | | + 0.10% std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::_M_pad(char, long, std::ios_base&, char*, char const*, int&) const
> | | | | | | | + 0.10% _ZNKSt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE13_M_insert_intImEES3_S3_RSt8ios_basecT_@plt
> | | | | | | + 0.10% std::ostream::sentry::sentry(std::ostream&)
> | | | | | + 2.80% std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::str() const
> | | | | | | + 1.00% std::string::assign(std::string const&)
> | | | | | | + 0.90% char* std::string::_S_construct<char*>(char*, char*, std::allocator<char> 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()
> | | | | | + 0.20% tc_free
> | | | | | + 0.20% __strlen_sse2_pminub
> | | | | | + 0.10% std::ios_base::~ios_base()
> | | | | | + 0.10% _ZNSt8ios_baseD2Ev@plt
> | | | | | + 0.10% _ZNKSt15basic_stringbufIcSt11char_traitsIcESaIcEE3strEv@plt
> | | | | + 18.20% PyFormatter::open_object_section(char const*)
> | | | | | + 17.10% PyDict_New
> | | | | | | + 16.70% _PyObject_GC_New
> | | | | | | + 16.70% _PyObject_GC_Malloc
> | | | | | | + 16.60% collect
> | | | | | | | + 8.10% dict_traverse
> | | | | | | | | + 3.20% visit_reachable
> | | | | | | | | | + 0.10% type_is_gc
> | | | | | | | | + 2.80% visit_decref
> | | | | | | | | + 1.60% PyDict_Next
> | | | | | | | + 1.30% list_traverse
> | | | | | | | | + 0.40% visit_decref
> | | | | | | | | + 0.30% visit_reachable
> | | | | | | | + 0.60% func_traverse
> | | | | | | | + 0.40% _PyDict_MaybeUntrack
> | | | | | | | + 0.10% type_traverse
> | | | | | | | + 0.10% subtype_traverse
> | | | | | | | + 0.10% set_traverse
> | | | | | | | + 0.10% class_traverse
> | | | | | | | + 0.10% _PyDict_MaybeUntrack@plt
> | | | | | | + 0.10% PyObject_Malloc
> | | | | | + 1.00% PyFormatter::dump_pyobject(char const*, _object*)
> | | | | | + 0.40% PyString_FromString
> | | | | | + 0.20% dict_set_item_by_hash_or_entry
> | | | | | + 0.20% PyDict_SetItem
> | | | | | + 0.10% app1
> | | | | + 6.60% ceph::Formatter::dump_format_unquoted(char const*, char const*, ...)
> | | | | | + 6.60% PyFormatter::dump_format_va(char const*, char const*, bool, char const*, __va_list_tag*)
> | | | | | + 3.90% __vsnprintf_chk
> | | | | | | + 3.40% vfprintf
> | | | | | | | + 0.50% strchrnul
> | | | | | | | + 0.40% __GI__IO_default_xsputn
> | | | | | | | + 0.20% tc_free
> | | | | | | | + 0.10% free@plt
> | | | | | | | + 0.10% (anonymous namespace)::free_null_or_invalid(void*, void (*)(void*)) [clone .constprop.41]
> | | | | | | + 0.20% _IO_no_init
> | | | | | | + 0.10% _IO_str_init_static_internal
> | | | | | + 1.50% PyFormatter::dump_pyobject(char const*, _object*)
> | | | | | | + 0.50% PyString_FromString
> | | | | | | + 0.40% PyDict_SetItem
> | | | | | | + 0.10% dict_set_item_by_hash_or_entry
> | | | | | | + 0.10% PyDict_SetItem@plt
> | | | | | + 1.20% PyString_FromString
> | | | | | + 0.60% PyObject_Malloc
> | | | | | + 0.20% __strlen_sse2_pminub
> | | | | | + 0.10% __memcpy_ssse3_back
> | | | | + 0.90% ctime_r
> | | | | + 0.80% PyFormatter::open_array_section(char const*)
> | | | | + 0.40% std::string::_Rep::_M_dispose(std::allocator<char> const&) [clone .isra.846] [clone .part.847]
> | | | | + 0.30% PyFormatter::dump_int(char const*, long)
> | | | | + 0.20% PyFormatter::close_section()
> | | | | + 0.10% tc_free
> | | | | + 0.10% std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)
> | | | | + 0.10% std::_Rb_tree_increment(std::_Rb_tree_node_base const*)
> | | | | + 0.10% pow2_hist_t::dump(ceph::Formatter*) const
> | | | | + 0.10% objectstore_perf_stat_t::dump(ceph::Formatter*) const
> | | | | + 0.10% PyFormatter::dump_string(char const*, std::basic_string_view<char, std::char_traits<char> >)
> | | | | + 0.10% PyFormatter::dump_pyobject(char const*, _object*)
> | | | + 21.80% Mutex::lock(bool)
> | | | | + 21.80% pthread_mutex_lock
> | | | | + 21.80% _L_lock_883
> | | | | + 21.80% __lll_lock_wait
> | | | + 11.70% PGMap::dump(ceph::Formatter*) const
> | | | | + 11.70% PGMap::dump_pg_stats(ceph::Formatter*, bool) const
> | | | | + 10.90% pg_stat_t::dump(ceph::Formatter*) const
> | | | | | + 4.20% PyFormatter::dump_stream(char const*)
> | | | | | | + 2.80% std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*)
> | | | | | | | + 2.10% std::basic_ios<char, std::char_traits<char> >::_M_cache_locale(std::locale const&)
> | | | | | | | | + 0.50% std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > const& std::use_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&)
> | | | | | | | | + 0.50% bool std::has_facet<std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&)
> | | | | | | | | + 0.40% bool std::has_facet<std::num_get<char, std::istreambuf_iterator<char, std::char_traits<char> > > >(std::locale const&)
> | | | | | | | | + 0.20% 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&)
> | | | | | | | | + 0.20% std::ctype<char> const& std::use_facet<std::ctype<char> >(std::locale const&)
> | | | | | | | | + 0.20% bool std::has_facet<std::ctype<char> >(std::locale const&)
> | | | | | | | | + 0.10% _ZSt9has_facetISt7num_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEEEbRKSt6locale@plt
> | | | | | | | + 0.70% std::ios_base::_M_init()
> | | | | | | + 0.50% tcmalloc::ThreadCache::FetchFromCentralCache(unsigned int, int)
> | | | | | | + 0.40% std::string::assign(char const*, unsigned long)
> | | | | | | + 0.20% std::locale::locale()
> | | | | | | + 0.10% std::ios_base::ios_base()
> | | | | | + 1.80% object_stat_collection_t::dump(ceph::Formatter*) const
> | | | | | | + 1.70% object_stat_sum_t::dump(ceph::Formatter*) const
> | | | | | | | + 1.40% PyFormatter::dump_pyobject(char const*, _object*)
> | | | | | | | | + 0.60% dictresize
> | | | | | | | | + 0.30% PyString_FromString
> | | | | | | | | + 0.20% PyDict_SetItem
> | | | | | | | | + 0.10% dict_set_item_by_hash_or_entry
> | | | | | | | + 0.20% PyFormatter::dump_int(char const*, long)
> | | | | | | + 0.10% PyFormatter::open_object_section(char const*)
> | | | | | + 1.80% PyFormatter::open_array_section(char const*)
> | | | | | | + 1.60% PyList_New
> | | | | | | | + 1.60% _PyObject_GC_New
> | | | | | | | + 1.60% _PyObject_GC_Malloc
> | | | | | | | + 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@rit.edu
>
> 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@redhat.com>
> Sent: Thursday, December 19, 2019 11:47 AM
> To: ceph-users@ceph.io
> Subject: [ceph-users] 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@gmail.com
>> <mailto:cobanserkan@gmail.com>> 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@mrc-lmb.cam.ac.uk <mailto:toby@mrc-lmb.cam.ac.uk>> 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@ceph.io
>> <mailto:ceph-users@ceph.io>
>> > To unsubscribe send an email to ceph-users-leave@ceph.io
>> <mailto:ceph-users-leave@ceph.io>
>> _______________________________________________
>> ceph-users mailing list -- ceph-users@ceph.io
>> <mailto:ceph-users@ceph.io>
>> To unsubscribe send an email to ceph-users-leave@ceph.io
>> <mailto:ceph-users-leave@ceph.io>
>>
>>
>> _______________________________________________
>> ceph-users mailing list -- ceph-users@ceph.io
>> To unsubscribe send an email to ceph-users-leave@ceph.io
> _______________________________________________
> ceph-users mailing list -- ceph-users@ceph.io
> To unsubscribe send an email to ceph-users-leave@ceph.io
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