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7a78601b5d68d0c91fce01eb61aab3dde73ec873
scylladb/utils
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Michał Chojnowski 126baa7850 utils: compact-radix-tree: fix accidental cache line bouncing 
Whenever a node_head_ptr is assigned to nil_root, the _backref inside it is
overwritten. But since nil_root is shared between shards, this causes severe
cache line bouncing. (It was observed to reduce the total write throughput
of Scylla by 90% on a large NUMA machine).

This backreference is never read anyway, so fix this bug by not writing it.

Fixes #9252

Closes #9246
2021-08-26 17:22:22 +03:00
..
arch/powerpc/crc32-vpmsum
utils: crc32: mark power crc32 assembly as not requiring an executable stack
2018-10-02 18:48:23 +01:00
gz
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
lsa
utils: Introduce lsa::weak_ptr<>
2021-07-02 19:02:14 +02:00
allocation_strategy.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
anchorless_list.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
array-search.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
array-search.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
ascii.cc
utils: add fast ascii string validation
2018-12-24 09:58:08 +02:00
ascii.hh
utils: add fast ascii string validation
2018-12-24 09:58:08 +02:00
atomic_vector.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
base64.cc
utils,alternator: move base64 code from alternator to utils
2021-08-09 09:24:36 +02:00
base64.hh
utils,alternator: move base64 code from alternator to utils
2021-08-09 09:24:36 +02:00
big_decimal.cc
utils: big_decimal: change to std::strong_ordering
2021-07-28 13:28:21 +03:00
big_decimal.hh
utils: big_decimal: change to std::strong_ordering
2021-07-28 13:28:21 +03:00
bit_cast.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bloom_calculations.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bloom_calculations.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bloom_filter.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bloom_filter.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bounded_stats_deque.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
bptree.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
buffer_input_stream.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
buffer_input_stream.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
build_id.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
build_id.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
cached_file.hh
cached_file: Issue single I/O for the whole read range on miss
2021-07-02 19:02:14 +02:00
chunked_vector.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
class_registrator.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
clmul.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
coarse_steady_clock.hh
rename coarse_clock to coarse_steady_clock
2021-08-02 17:41:21 +03:00
collection-concepts.hh
util: Drop int_or_strong_ordering concept
2021-06-08 11:40:55 +03:00
compact-radix-tree.hh
utils: compact-radix-tree: fix accidental cache line bouncing
2021-08-26 17:22:22 +03:00
config_file_impl.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
config_file.cc
everywhere: cleanup defer.hh includes
2021-08-22 21:11:39 +03:00
config_file.hh
everywhere: cleanup defer.hh includes
2021-08-22 21:11:39 +03:00
coroutine.hh
utils/coroutine: wrap a helper in utils namespace
2021-07-22 13:28:43 +03:00
crc.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
data_input.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
date.h
date: use correct casts for years
2017-04-17 23:03:15 +03:00
directories.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
directories.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
disk-error-handler.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
disk-error-handler.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
div_ceil.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
double-decker.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
dynamic_bitset.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
dynamic_bitset.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
entangled.hh
lsa: Introduce entangled helper
2021-07-02 19:02:13 +02:00
enum_option.hh
utils/enum_option.hh: add implicit converter to the underlying enum
2021-06-13 13:18:49 +03:00
error_injection.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
error_injection.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
estimated_histogram.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
exceptions.cc
utils: exceptions: is_timeout_exception: add timed_out_error
2021-07-08 15:23:29 +03:00
exceptions.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
exponential_backoff_retry.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
extremum_tracking.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
fb_utilities.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
file_lock.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
file_lock.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
flush_queue.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
fragment_range.hh
utils: fragment_range: change to std::strong_ordering
2021-07-28 13:27:49 +03:00
fragmented_temporary_buffer.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
generation-number.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
generation-number.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
hash.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
histogram_metrics_helper.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
histogram.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
human_readable.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
human_readable.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
i_filter.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
i_filter.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
immutable-collection.hh
utils: Introduce immutable_collection<>
2021-07-27 20:06:53 +03:00
in.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
input_stream.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
int_range.hh
utils: int_range: change to std::strong_ordering
2021-07-28 13:29:50 +03:00
intrusive_btree.hh
everywhere: cleanup defer.hh includes
2021-08-22 21:11:39 +03:00
intrusive-array.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
joinpoint.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
large_bitset.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
large_bitset.hh
treewide: reduce header interdependencies
2021-06-07 15:58:35 +03:00
latency.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
like_matcher.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
like_matcher.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
limiting_data_source.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
limiting_data_source.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
linearizing_input_stream.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
loading_cache.hh
loading_shared_values/loading_cache: get rid of iterators interface and return value_ptr from find(...) instead
2021-08-22 16:49:40 +03:00
loading_shared_values.hh
loading_shared_values/loading_cache: get rid of iterators interface and return value_ptr from find(...) instead
2021-08-22 16:49:40 +03:00
log_heap.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
logalloc.cc
rename coarse_clock to coarse_steady_clock
2021-08-02 17:41:21 +03:00
logalloc.hh
logalloc: count evicted memory
2021-08-01 19:34:13 +03:00
lru.hh
row_cache: Use generic LRU for eviction
2021-07-02 10:25:58 +02:00
managed_bytes.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
managed_bytes.hh
range_tombstone_list, code: Mark external_memory_usage noexcept
2021-07-27 20:06:53 +03:00
managed_ref.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
managed_vector.hh
sstables: Cache partition index pages in LSA and link to LRU
2021-07-02 19:02:14 +02:00
maybe_yield.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
memory_data_sink.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
multiprecision_int.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
multiprecision_int.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
murmur_hash.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
murmur_hash.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
mutable_view.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
neat-object-id.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
observable.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
overloaded_functor.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
phased_barrier.hh
treewide: reduce header interdependencies
2021-06-07 15:58:35 +03:00
preempt.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
ranges.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
rate_limiter.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
rate_limiter.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
reusable_buffer.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
rjson.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
rjson.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
runtime.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
runtime.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
sequenced_set.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
serialization.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
serialized_action.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
small_vector.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
stall_free.hh
utils: stall_free: implemnt clear_gently of froeign_ptr
2021-07-01 19:16:11 +03:00
streaming_histogram.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
top_k.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
updateable_value.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
updateable_value.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
utf8.cc
utils/utf8.c: move includes outside of namespaces
2021-05-30 23:23:20 +03:00
utf8.hh
utils: fragment_range: add a fragment iterator for FragmentedView
2021-01-15 14:05:44 +01:00
UUID_gen.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
UUID_gen.hh
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
uuid.cc
treewide: extent copyright statements to present day
2021-06-06 19:18:49 +03:00
UUID.hh
uuid: change comparators to std::strong_ordering
2021-07-28 13:20:32 +03:00
variant_element.hh
utils: introduce variant_element.hh
2021-07-27 20:08:47 +03:00
vle.hh
uleb64: Add express encoding
2021-06-16 17:47:10 +03:00