bpf: allow self-xor operation
[dpdk.git] / app / test / test_trace_perf.c
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(C) 2020 Marvell International Ltd.
3  */
4
5 #include <rte_cycles.h>
6 #include <rte_debug.h>
7 #include <rte_eal.h>
8 #include <rte_eal_trace.h>
9 #include <rte_malloc.h>
10 #include <rte_lcore.h>
11
12 #include "test.h"
13 #include "test_trace.h"
14
15 struct test_data;
16
17 struct lcore_data {
18         volatile bool done;
19         volatile bool started;
20         uint64_t total_cycles;
21         uint64_t total_calls;
22 } __rte_cache_aligned;
23
24 struct test_data {
25         unsigned int nb_workers;
26         struct lcore_data ldata[];
27 } __rte_cache_aligned;
28
29 #define STEP 100
30 #define CENT_OPS(OP) do {     \
31 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
32 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
33 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
34 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
35 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
36 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
37 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
38 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
39 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
40 OP; OP; OP; OP; OP; OP; OP; OP; OP; OP; \
41 } while (0)
42
43 static void
44 measure_perf(const char *str, struct test_data *data)
45 {
46         uint64_t hz = rte_get_timer_hz();
47         uint64_t total_cycles = 0;
48         uint64_t total_calls = 0;
49         double cycles, ns;
50         unsigned int workers;
51
52         for (workers = 0; workers < data->nb_workers; workers++) {
53                 total_cycles += data->ldata[workers].total_cycles;
54                 total_calls += data->ldata[workers].total_calls;
55         }
56
57         cycles = total_calls ? (double)total_cycles / (double)total_calls : 0;
58         cycles /= STEP;
59         cycles /= 100; /* CENT_OPS */
60
61         ns = (cycles / (double)hz) * 1E9;
62         printf("%16s: cycles=%f ns=%f\n", str, cycles, ns);
63 }
64
65 static void
66 wait_till_workers_are_ready(struct test_data *data)
67 {
68         unsigned int workers;
69
70         for (workers = 0; workers < data->nb_workers; workers++)
71                 while (!data->ldata[workers].started)
72                         rte_pause();
73 }
74
75 static void
76 signal_workers_to_finish(struct test_data *data)
77 {
78         unsigned int workers;
79
80         for (workers = 0; workers < data->nb_workers; workers++) {
81                 data->ldata[workers].done = 1;
82         }
83 }
84
85 #define WORKER_DEFINE(func) \
86 static void __rte_noinline \
87 __worker_##func(struct lcore_data *ldata) \
88 { \
89         uint64_t start; \
90         int i; \
91         while (!ldata->done) { \
92                 start = rte_get_timer_cycles(); \
93                 for (i = 0; i < STEP; i++) \
94                         CENT_OPS(func); \
95                 ldata->total_cycles += rte_get_timer_cycles() - start; \
96                 ldata->total_calls++; \
97         } \
98 } \
99 static int \
100 worker_fn_##func(void *arg) \
101 { \
102         struct lcore_data *ldata = arg; \
103         ldata->started = 1; \
104         __worker_##func(ldata); \
105         return 0; \
106 }
107
108
109 /* Test to find trace overhead */
110 #define GENERIC_VOID rte_eal_trace_generic_void()
111 #define GENERIC_U64 rte_eal_trace_generic_u64(0x120000)
112 #define GENERIC_INT rte_eal_trace_generic_int(-34)
113 #define GENERIC_FLOAT rte_eal_trace_generic_float(3.3f)
114 #define GENERIC_DOUBLE rte_eal_trace_generic_double(3.66666)
115 #define GENERIC_STR rte_eal_trace_generic_str("hello world")
116 #define VOID_FP app_dpdk_test_fp()
117
118 WORKER_DEFINE(GENERIC_VOID)
119 WORKER_DEFINE(GENERIC_U64)
120 WORKER_DEFINE(GENERIC_INT)
121 WORKER_DEFINE(GENERIC_FLOAT)
122 WORKER_DEFINE(GENERIC_DOUBLE)
123 WORKER_DEFINE(GENERIC_STR)
124 WORKER_DEFINE(VOID_FP)
125
126 static void
127 run_test(const char *str, lcore_function_t f, struct test_data *data, size_t sz)
128 {
129         unsigned int id, worker = 0;
130
131         memset(data, 0, sz);
132         data->nb_workers = rte_lcore_count() - 1;
133         RTE_LCORE_FOREACH_WORKER(id)
134                 rte_eal_remote_launch(f, &data->ldata[worker++], id);
135
136         wait_till_workers_are_ready(data);
137         rte_delay_ms(100); /* Wait for some time to accumulate the stats */
138         signal_workers_to_finish(data);
139
140         RTE_LCORE_FOREACH_WORKER(id)
141                 rte_eal_wait_lcore(id);
142
143         measure_perf(str, data);
144 }
145
146 static int
147 test_trace_perf(void)
148 {
149         unsigned int nb_cores, nb_workers;
150         struct test_data *data;
151         size_t sz;
152
153         nb_cores = rte_lcore_count();
154         nb_workers = nb_cores - 1;
155         if (nb_cores < 2) {
156                 printf("Need minimum two cores for testing\n");
157                 return TEST_SKIPPED;
158         }
159
160         printf("Timer running at %5.2fMHz\n", rte_get_timer_hz()/1E6);
161         sz = sizeof(struct test_data);
162         sz += nb_workers * sizeof(struct lcore_data);
163
164         data = rte_zmalloc(NULL, sz, RTE_CACHE_LINE_SIZE);
165         if (data == NULL) {
166                 printf("Failed to allocate memory\n");
167                 return TEST_FAILED;
168         }
169
170         run_test("void", worker_fn_GENERIC_VOID, data, sz);
171         run_test("u64", worker_fn_GENERIC_U64, data, sz);
172         run_test("int", worker_fn_GENERIC_INT, data, sz);
173         run_test("float", worker_fn_GENERIC_FLOAT, data, sz);
174         run_test("double", worker_fn_GENERIC_DOUBLE, data, sz);
175         run_test("string", worker_fn_GENERIC_STR, data, sz);
176         run_test("void_fp", worker_fn_VOID_FP, data, sz);
177
178         rte_free(data);
179         return TEST_SUCCESS;
180 }
181
182 REGISTER_TEST_COMMAND(trace_perf_autotest, test_trace_perf);