Commit | Line | Data |
---|---|---|
a101fa10 MD |
1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
2 | * | |
3 | * counter/counter-types.h | |
4 | * | |
5 | * LTTng Counters Types | |
6 | * | |
7 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | */ | |
9 | ||
10 | #ifndef _LTTNG_COUNTER_TYPES_H | |
11 | #define _LTTNG_COUNTER_TYPES_H | |
12 | ||
13 | #include <linux/types.h> | |
14 | #include <linux/percpu.h> | |
15 | #include <counter/config.h> | |
16 | ||
17 | struct lib_counter_dimension { | |
18 | /* | |
19 | * Max. number of indexable elements. | |
20 | */ | |
21 | size_t max_nr_elem; | |
22 | /* | |
23 | * The stride for a dimension is the multiplication factor which | |
24 | * should be applied to its index to take into account other | |
25 | * dimensions nested inside. | |
26 | */ | |
27 | size_t stride; | |
28 | }; | |
29 | ||
30 | struct lib_counter_layout { | |
31 | void *counters; | |
32 | unsigned long *underflow_bitmap; | |
33 | unsigned long *overflow_bitmap; | |
34 | }; | |
35 | ||
36 | enum lib_counter_arithmetic { | |
37 | LIB_COUNTER_ARITHMETIC_MODULAR, | |
38 | LIB_COUNTER_ARITHMETIC_SATURATE, | |
39 | }; | |
40 | ||
41 | struct lib_counter { | |
42 | size_t nr_dimensions; | |
43 | int64_t allocated_elem; | |
44 | struct lib_counter_dimension *dimensions; | |
45 | enum lib_counter_arithmetic arithmetic; | |
46 | union { | |
47 | struct { | |
48 | int32_t max, min; | |
49 | } limits_32_bit; | |
50 | struct { | |
51 | int64_t max, min; | |
52 | } limits_64_bit; | |
53 | } saturation; | |
54 | union { | |
55 | int8_t s8; | |
56 | int16_t s16; | |
57 | int32_t s32; | |
58 | int64_t s64; | |
59 | } global_sum_step; /* 0 if unused */ | |
60 | struct lib_counter_config config; | |
61 | ||
62 | struct lib_counter_layout global_counters; | |
63 | struct lib_counter_layout __percpu *percpu_counters; | |
64 | }; | |
65 | ||
66 | #endif /* _LTTNG_COUNTER_TYPES_H */ |