blob: a3fd3ae5f75f86ca08ecbc96c5a3a52988a361b0 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "time.h"
#include <vespa/vespalib/stllike/string.h>
#include <vespa/vespalib/stllike/hash_map.h>
#include <functional>
namespace vespalib {
namespace slime { struct Cursor; }
/**
* A simple single-threaded profiler used to measure where time is
* spent when executing tasks that may depend on each other (doing one
* task includes doing another task; like one function calls another
* function). Each task is identified by a unique name. Data is
* collected in real-time using signals about when a task is started
* and when it completes. Any sub-task must complete before any parent
* task. Any task may be executed any number of times and may depend
* on any other task.
**/
class ExecutionProfiler {
public:
using TaskId = uint32_t;
struct ReportContext;
struct Impl {
virtual ~Impl() = default;
virtual void track_start(TaskId task) = 0;
virtual void track_complete() = 0;
virtual void report(slime::Cursor &obj, ReportContext &ctx) const = 0;
};
using NameMapper = std::function<vespalib::string(const vespalib::string &)>;
private:
size_t _level;
size_t _max_depth;
std::vector<vespalib::string> _names;
vespalib::hash_map<vespalib::string,size_t> _name_map;
std::unique_ptr<Impl> _impl;
public:
ExecutionProfiler(int32_t profile_depth);
~ExecutionProfiler();
TaskId resolve(const vespalib::string &name);
const vespalib::string &name_of(TaskId task) const { return _names[task]; }
void start(TaskId task) {
if (++_level <= _max_depth) {
_impl->track_start(task);
}
}
void complete() {
if (--_level < _max_depth) {
_impl->track_complete();
}
}
void report(slime::Cursor &obj, const NameMapper &name_mapper =
[](const vespalib::string &name) noexcept { return name; }) const;
};
}
|
