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scylladb/utils
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Eliran Sinvani 4c434f3fa4 moving avarage rate: Keep computed rates in zero until they are 
meaningful

When computing moving average rates too early after startup, the
rate can be infinite, this is simply because the sample interval
since the system started is too small to generate meaningful results.
Here we check for this situation and keep the rate at 0 if it happens
to signal that there are still no meaningful results.
This incident is unlikely to happen since it can happen only during a
very small time window after restart, so we add a hint to the compiler
to optimize for that in order to have a minimum impact on the normal
usecase.

Fixes #4469
2020-11-04 11:13:59 +02:00
..
arch/powerpc/crc32-vpmsum
…
gz
utils: add missing include for ssize_t
2020-01-30 14:10:18 +02:00
allocation_strategy.hh
allocation_strategy: Fix standard_migrator initialization
2020-10-28 16:22:23 +02:00
anchorless_list.hh
…
array-search.cc
utils: array-search: deinline, working around clang bug
2020-10-11 10:29:24 +03:00
array-search.hh
utils/array-search: document restrictions
2020-10-11 15:19:54 +03:00
ascii.cc
…
ascii.hh
…
atomic_vector.hh
atomic_vetor: Don't pass references to callbacks
2020-04-23 16:06:37 +03:00
big_decimal.cc
utils: big_decimal: work around clang difficulty with boost::cpp_int(string_view) constructor
2020-10-11 22:09:19 +03:00
big_decimal.hh
big_decimal: Add a as_rational member function
2020-06-25 15:33:31 -07:00
bloom_calculations.cc
…
bloom_calculations.hh
utils: bloom_calculations: avoid gratuitous conversion to double
2020-09-22 17:24:33 +03:00
bloom_filter.cc
Update seastar submodule
2020-03-23 11:59:30 +02:00
bloom_filter.hh
…
bounded_stats_deque.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
bptree.hh
utils: bptree: remove redundant and possibly wrong friend declaration
2020-09-22 17:24:33 +03:00
buffer_input_stream.cc
…
buffer_input_stream.hh
…
build_id.cc
utils: build_id: fix ubsan false positive on pointer arithmetic
2020-10-11 17:23:40 +03:00
build_id.hh
build_id: mv sources to utils/
2020-08-03 15:55:16 +03:00
cached_file.hh
utils: cached_file: Fix compilation error
2020-06-18 14:08:29 +03:00
chunked_vector.hh
utils/chunked_vector: add reserve_partial()
2020-11-02 18:02:01 +02:00
class_registrator.hh
class_registry: Use std::string_view in (un)?qualified_name
2020-07-03 12:28:14 -07:00
clmul.hh
…
collection-concepts.hh
intrusive-array: Array with trusted bounds
2020-07-14 16:29:49 +03:00
config_file_impl.hh
utils: config_src::add_command_line_options(): drop name and desc args
2020-07-28 18:00:29 +03:00
config_file.cc
utils: config_src::add_command_line_options(): drop name and desc args
2020-07-28 18:00:29 +03:00
config_file.hh
db/config_file.hh: named_value: remove unused members _name and _desc
2020-08-03 12:51:16 +03:00
coroutine.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
crc.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
data_input.hh
…
date.h
…
directories.cc
messaging_service: Move initialization to messaging/
2020-08-19 13:08:12 +03:00
directories.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
disk-error-handler.cc
utils: Move disk-error-handler into it
2020-02-09 17:26:52 +02:00
disk-error-handler.hh
utils: do_io_check: adjust indentation
2020-08-06 19:01:18 +03:00
div_ceil.hh
…
double-decker.hh
memtable: Switch onto B+ rails
2020-07-14 16:30:02 +03:00
dynamic_bitset.cc
…
dynamic_bitset.hh
…
enum_option.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
error_injection.cc
utils: error_injection: remove forward-declared function returning auto
2020-09-22 17:24:33 +03:00
error_injection.hh
utils: error_injection: remove forward-declared function returning auto
2020-09-22 17:24:33 +03:00
estimated_histogram.hh
approx_exponential_histogram: Makes the implementation clearer
2020-06-18 14:18:21 +03:00
exceptions.cc
utils: Use on_internal_error from seastar
2020-02-29 19:28:57 +02:00
exceptions.hh
utils: Use on_internal_error from seastar
2020-02-29 19:28:57 +02:00
exponential_backoff_retry.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
extremum_tracking.hh
…
fb_utilities.hh
fb_utilities.hh: mark methods noexcept
2020-11-01 16:46:18 +02:00
file_lock.cc
treewide: replace calls to engine().some_api() with some_api()
2020-04-05 12:46:04 +03:00
file_lock.hh
…
flush_queue.hh
flush_queue: call_helper: support no variadic futures
2020-10-11 14:40:32 +03:00
fragment_range.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
fragmented_temporary_buffer.hh
utils: fragmented_temporary_buffer: don't add to potentially null pointers
2020-10-11 15:05:15 +03:00
generation-number.cc
storage_service: Move get_generation_number to util/
2020-06-01 09:08:40 +03:00
generation-number.hh
storage_service: Move get_generation_number to util/
2020-06-01 09:08:40 +03:00
hash.hh
database: Use a flat_hash_map for _ks_cf_to_uuid
2020-06-14 08:18:39 -07:00
histogram_metrics_helper.hh
approx_exponential_histogram: Makes the implementation clearer
2020-06-18 14:18:21 +03:00
histogram.hh
moving avarage rate: Keep computed rates in zero until they are
2020-11-04 11:13:59 +02:00
human_readable.cc
utils: add to_hr_size()
2020-10-13 12:32:14 +03:00
human_readable.hh
utils: add to_hr_size()
2020-10-13 12:32:14 +03:00
i_filter.cc
…
i_filter.hh
…
in.hh
…
input_stream.hh
…
int_range.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
intrusive-array.hh
intrusive-array: Array with trusted bounds
2020-07-14 16:29:49 +03:00
joinpoint.hh
treewide: replace calls to engine().some_api() with some_api()
2020-04-05 12:46:04 +03:00
large_bitset.cc
utils/large_bitset: use reserve_partial() to reserve _storage
2020-11-02 18:03:19 +02:00
large_bitset.hh
…
latency.hh
…
like_matcher.cc
cql3: Allow repeated LIKE on same column
2020-02-27 09:34:51 -05:00
like_matcher.hh
cql3: Allow repeated LIKE on same column
2020-02-27 09:34:51 -05:00
limiting_data_source.cc
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limiting_data_source.hh
…
linearizing_input_stream.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
loading_cache.hh
Update seastar submodule
2020-08-04 17:54:45 +03:00
loading_shared_values.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
log_heap.hh
utils: log_heap: relax check for clang's sanitizer
2020-10-11 16:07:16 +03:00
logalloc.cc
lsa: decay reserves
2020-09-08 15:59:25 +03:00
logalloc.hh
lsa: decay reserves
2020-09-08 15:59:25 +03:00
managed_bytes.cc
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managed_bytes.hh
managed_bytes: Delete dead 'if'
2020-07-17 11:58:53 +03:00
managed_ref.hh
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managed_vector.hh
…
memory_data_sink.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
meta.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
multiprecision_int.cc
utils: introduce multiprecision_int
2020-03-04 12:42:57 +02:00
multiprecision_int.hh
utils: multiprecision_int: disambiguate operator templates by adding overloads
2020-09-22 17:24:33 +03:00
murmur_hash.cc
everywhere: Insert space after switch
2020-08-18 14:31:04 +03:00
murmur_hash.hh
everywhere: Insert space after switch
2020-08-18 14:31:04 +03:00
mutable_view.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
neat-object-id.hh
utils: B+ tree implementation
2020-07-14 16:29:43 +03:00
observable.hh
…
overloaded_functor.hh
…
phased_barrier.hh
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preempt.hh
treewide: add missing headers and/or forward declarations
2020-03-23 09:29:45 +02:00
ranges.hh
utils: to_range(): relax constraint
2020-10-18 18:16:30 +03:00
rate_limiter.cc
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rate_limiter.hh
treewide: replace calls to engine().some_api() with some_api()
2020-04-05 12:46:04 +03:00
reusable_buffer.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
rjson.cc
rjson: Add templated get/set overloads and optional get<T>
2020-07-15 08:10:23 +00:00
rjson.hh
rjson: Add templated get/set overloads and optional get<T>
2020-07-15 08:10:23 +00:00
runtime.cc
…
runtime.hh
…
sequenced_set.hh
Update seastar submodule
2020-03-23 11:59:30 +02:00
serialization.hh
treewide: update concepts language from the Concepts TS to C++20
2020-06-02 09:12:21 +03:00
serialized_action.hh
serialized_action: trigger: propagate action error
2020-10-14 16:45:21 +03:00
small_vector.hh
utils/small_vector: Add missing include
2020-03-03 21:23:40 +02:00
stall_free.hh
utils: Add clear_gently
2020-08-11 19:37:47 +08:00
streaming_histogram.hh
streaming_histogram: add missing include for uint64_t
2020-05-23 11:09:10 +03:00
top_k.hh
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updateable_value.cc
utils: updateable_value: fix nullptr_t name
2020-09-22 17:24:33 +03:00
updateable_value.hh
utils: updateable_value: fix nullptr_t name
2020-09-22 17:24:33 +03:00
utf8.cc
utils: utf8: expose validate_partial() in a header
2020-10-21 11:14:44 +03:00
utf8.hh
utils: utf8: add function to validate fragmented buffers
2020-10-21 11:14:44 +03:00
UUID_gen.cc
…
UUID_gen.hh
Alternator::streams: Make SequenceNumber monotinically growing
2020-10-14 16:45:21 +03:00
uuid.cc
…
UUID.hh
utils: UUID: assert UUID.is_timestamp
2020-01-26 18:54:36 +02:00