Seastar
High performance C++ framework for concurrent servers
metrics_types.hh
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18 /*
19  * Copyright (C) 2016 ScyllaDB
20  */
21 
22 #pragma once
23 
24 #ifndef SEASTAR_MODULE
25 #include <cstdint>
26 #include <vector>
27 #include <seastar/util/modules.hh>
28 #endif
29 
30 namespace seastar {
31 namespace metrics {
32 
33 SEASTAR_MODULE_EXPORT_BEGIN
34 
42  uint64_t count = 0; // number of events.
43  double upper_bound = 0; // Inclusive.
44 };
45 
46 
54 struct histogram {
55  uint64_t sample_count = 0;
56  double sample_sum = 0;
57  std::vector<histogram_bucket> buckets; // Ordered in increasing order of upper_bound, +Inf bucket is optional.
58 
66 
74  histogram operator+(const histogram& h) const;
75 
84 
85 };
86 
87 SEASTAR_MODULE_EXPORT_END
88 
89 }
90 
91 }
Histogram bucket type.
Definition: metrics_types.hh:41
Seastar API namespace.
Definition: abort_on_ebadf.hh:26
Histogram data type.
Definition: metrics_types.hh:54
histogram & operator+=(const histogram &h)
Addition assigning a historgram.
histogram operator+(histogram &&h) const
Addition historgrams.
histogram operator+(const histogram &h) const
Addition historgrams.