1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
3 * lttng-counter-client-percpu-32-modular.c
5 * LTTng lib counter client. Per-cpu 32-bit counters in modular
8 * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11 #include "ust-events-internal.h"
12 #include "common/counter/counter.h"
13 #include "common/counter/counter-api.h"
14 #include "lttng-tracer-core.h"
15 #include "lttng-counter-client.h"
17 static const struct lib_counter_config client_config
= {
18 .alloc
= COUNTER_ALLOC_PER_CPU
,
19 .sync
= COUNTER_SYNC_PER_CPU
,
20 .arithmetic
= COUNTER_ARITHMETIC_MODULAR
,
21 .counter_size
= COUNTER_SIZE_32_BIT
,
24 static struct lib_counter
*counter_create(size_t nr_dimensions
,
25 const struct lttng_counter_dimension
*dimensions
,
26 int64_t global_sum_step
,
27 int global_counter_fd
,
28 int nr_counter_cpu_fds
,
29 const int *counter_cpu_fds
,
32 size_t max_nr_elem
[LTTNG_COUNTER_DIMENSION_MAX
], i
;
34 if (nr_dimensions
> LTTNG_COUNTER_DIMENSION_MAX
)
36 for (i
= 0; i
< nr_dimensions
; i
++) {
37 if (dimensions
[i
].has_underflow
|| dimensions
[i
].has_overflow
)
39 max_nr_elem
[i
] = dimensions
[i
].size
;
41 return lttng_counter_create(&client_config
, nr_dimensions
, max_nr_elem
,
42 global_sum_step
, global_counter_fd
, nr_counter_cpu_fds
,
43 counter_cpu_fds
, is_daemon
);
46 static void counter_destroy(struct lib_counter
*counter
)
48 lttng_counter_destroy(counter
);
51 static int counter_add(struct lib_counter
*counter
, const size_t *dimension_indexes
, int64_t v
)
53 return lttng_counter_add(&client_config
, counter
, dimension_indexes
, v
);
56 static int counter_read(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
57 int64_t *value
, bool *overflow
, bool *underflow
)
59 return lttng_counter_read(&client_config
, counter
, dimension_indexes
, cpu
, value
,
63 static int counter_aggregate(struct lib_counter
*counter
, const size_t *dimension_indexes
,
64 int64_t *value
, bool *overflow
, bool *underflow
)
66 return lttng_counter_aggregate(&client_config
, counter
, dimension_indexes
, value
,
70 static int counter_clear(struct lib_counter
*counter
, const size_t *dimension_indexes
)
72 return lttng_counter_clear(&client_config
, counter
, dimension_indexes
);
75 static struct lttng_counter_transport lttng_counter_transport
= {
76 .name
= "counter-per-cpu-32-modular",
78 .counter_create
= counter_create
,
79 .counter_destroy
= counter_destroy
,
80 .counter_add
= counter_add
,
81 .counter_read
= counter_read
,
82 .counter_aggregate
= counter_aggregate
,
83 .counter_clear
= counter_clear
,
85 .client_config
= &client_config
,
88 void lttng_counter_client_percpu_32_modular_init(void)
90 lttng_counter_transport_register(<tng_counter_transport
);
93 void lttng_counter_client_percpu_32_modular_exit(void)
95 lttng_counter_transport_unregister(<tng_counter_transport
);