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@xxxxxxx
CONFIDENTIALITY NOTE: The information transmitted, including attachments, is
intended only for the person(s) or entity to which it is addressed and may
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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
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> To unsubscribe send an email to ceph-users-leave@xxxxxxx
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>
>
> _______________________________________________
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> To unsubscribe send an email to ceph-users-leave@xxxxxxx
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