The CPU is used by userspace, not kernelspace Here is the perf top, see attachment
Rocksdb eats everything :/ On 4/8/20 3:14 PM, Paul Emmerich wrote: > What's the CPU busy with while spinning at 100%? > > Check "perf top" for a quick overview > > > Paul >
Samples: 1M of event 'cycles:ppp', 4000 Hz, Event count (approx.): 330103591171
Overhead Shared Object Symbol
4,99% ceph-osd [.]
rocksdb::autovector<rocksdb::IteratorWrapperBase<rocksdb::Slice>*, 8ul>::size
◆
3,14% ceph-osd [.]
std::vector<rocksdb::IteratorWrapperBase<rocksdb::Slice>*,
std::allocator<rocksdb::IteratorWrapperBase<rocksdb::Slice>*> >::size ▒
2,46% ceph-osd [.] rocksdb::Status::Status
▒
2,19% ceph-osd [.] rocksdb::Slice::compare
▒
1,98% ceph-osd [.]
rocksdb::DBIter::FindNextUserEntryInternal
▒
1,87% ceph-osd [.]
rocksdb::UserComparatorWrapper::Compare
▒
1,75% ceph-osd [.]
rocksdb::autovector<rocksdb::IteratorWrapperBase<rocksdb::Slice>*, 8ul>::empty
▒
1,59% [kernel] [k]
copy_user_enhanced_fast_string
▒
1,57% ceph-osd [.]
rocksdb::DataBlockIter::ParseNextDataKey<rocksdb::DecodeEntry>
▒
1,57% ceph-osd [.]
rocksdb::autovector<rocksdb::IteratorWrapperBase<rocksdb::Slice>*,
8ul>::operator[] ▒
1,54% ceph-osd [.] rocksdb::Status::ok
▒
1,53% ceph-osd [.]
rocksdb::DecodeEntry::operator()
▒
1,52% ceph-osd [.]
rocksdb::BlockBasedTableIterator<rocksdb::DataBlockIter,
rocksdb::Slice>::status
▒
1,52% ceph-osd [.]
rocksdb::IteratorWrapperBase<rocksdb::Slice>::Update
▒
1,50% ceph-osd [.]
rocksdb::BinaryHeap<rocksdb::IteratorWrapperBase<rocksdb::Slice>*,
rocksdb::MinIteratorComparator>::downheap ▒
1,37% ceph-osd [.] rocksdb::Slice::Slice
▒
1,20% ceph-osd [.]
rocksdb::IteratorWrapperBase<rocksdb::Slice>::status
▒
1,18% ceph-osd [.] rocksdb::ExtractUserKey
▒
1,06% ceph-osd [.]
rocksdb::autovector<std::_Rb_tree_const_iterator<rocksdb::TruncatedRangeDelIterator*>,
8ul>::size ▒
1,05% ceph-osd [.] rocksdb::Status::~Status
▒
1,04% ceph-osd [.]
rocksdb::ForwardRangeDelIterator::ShouldDelete
▒
1,03% ceph-osd [.] rocksdb::ParseInternalKey
▒
0,93% ceph-osd [.]
rocksdb::IteratorWrapperBase<rocksdb::Slice>::Valid
▒
0,90% ceph-osd [.]
rocksdb::IteratorWrapperBase<rocksdb::Slice>::Next
▒
0,86% ceph-osd [.]
rocksdb::ParsedInternalKey::ParsedInternalKey
▒
0,85% ceph-osd [.] rocksdb::Status::code
▒
0,84% ceph-osd [.]
rocksdb::MinIteratorComparator::operator()
▒
0,84% ceph-osd [.]
rocksdb::BlockIter<rocksdb::BlockHandle>::status
▒
0,83% ceph-osd [.] TLS init function for
rocksdb::perf_context
▒
0,81% ceph-osd [.]
rocksdb::BinaryHeap<rocksdb::IteratorWrapperBase<rocksdb::Slice>*,
rocksdb::MinIteratorComparator>::empty ▒
0,80% ceph-osd [.]
rocksdb::MergingIterator::Valid
▒
0,80% ceph-osd [.]
rocksdb::RangeDelAggregator::StripeRep::ShouldDelete
▒
0,77% ceph-osd [.]
rocksdb::IteratorWrapperBase<rocksdb::Slice>::key
▒
0,77% ceph-osd [.]
rocksdb::MergingIterator::Next
▒
0,74% ceph-osd [.]
rocksdb::InternalKeyComparator::Compare
▒
0,74% ceph-osd [.]
rocksdb::BlockBasedTableIterator<rocksdb::DataBlockIter,
rocksdb::Slice>::FindKeyForward
▒
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