1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright (C) 2016 Intel Corporation.
3 * All rights reserved.
4 */
5
6 #include "spdk/stdinc.h"
7
8 #include "spdk/env.h"
9 #include "spdk/event.h"
10 #include "spdk/log.h"
11 #include "spdk/string.h"
12
13 static uint64_t g_tsc_rate;
14 static uint64_t g_tsc_end;
15
16 static int g_time_in_sec;
17
18 static uint64_t *call_count;
19
20 static bool g_app_stopped = false;
21
22 static void
submit_new_event(void * arg1,void * arg2)23 submit_new_event(void *arg1, void *arg2)
24 {
25 struct spdk_event *event;
26 static __thread uint32_t next_lcore = UINT32_MAX;
27
28 if (spdk_get_ticks() > g_tsc_end) {
29 if (__sync_bool_compare_and_swap(&g_app_stopped, false, true)) {
30 spdk_app_stop(0);
31 }
32 return;
33 }
34
35 if (next_lcore == UINT32_MAX) {
36 next_lcore = spdk_env_get_next_core(spdk_env_get_current_core());
37 if (next_lcore == UINT32_MAX) {
38 next_lcore = spdk_env_get_first_core();
39 }
40 }
41
42 call_count[next_lcore]++;
43 event = spdk_event_allocate(next_lcore, submit_new_event, NULL, NULL);
44 spdk_event_call(event);
45 }
46
47 static void
event_work_fn(void * arg1,void * arg2)48 event_work_fn(void *arg1, void *arg2)
49 {
50
51 submit_new_event(NULL, NULL);
52 submit_new_event(NULL, NULL);
53 submit_new_event(NULL, NULL);
54 submit_new_event(NULL, NULL);
55 }
56
57 static void
event_perf_start(void * arg1)58 event_perf_start(void *arg1)
59 {
60 uint32_t i;
61
62 call_count = calloc(spdk_env_get_last_core() + 1, sizeof(*call_count));
63 if (call_count == NULL) {
64 fprintf(stderr, "call_count allocation failed\n");
65 spdk_app_stop(1);
66 return;
67 }
68
69 g_tsc_rate = spdk_get_ticks_hz();
70 g_tsc_end = spdk_get_ticks() + g_time_in_sec * g_tsc_rate;
71
72 printf("Running I/O for %d seconds...", g_time_in_sec);
73 fflush(stdout);
74
75 SPDK_ENV_FOREACH_CORE(i) {
76 spdk_event_call(spdk_event_allocate(i, event_work_fn,
77 NULL, NULL));
78 }
79
80 }
81
82 static void
usage(char * program_name)83 usage(char *program_name)
84 {
85 printf("%s options\n", program_name);
86 printf("\t[-m core mask for distributing I/O submission/completion work\n");
87 printf("\t\t(default: 0x1 - use core 0 only)]\n");
88 printf("\t[-t time in seconds]\n");
89 }
90
91 static void
performance_dump(int io_time)92 performance_dump(int io_time)
93 {
94 uint32_t i;
95
96 if (call_count == NULL) {
97 return;
98 }
99
100 printf("\n");
101 SPDK_ENV_FOREACH_CORE(i) {
102 printf("lcore %2d: %8ju\n", i, call_count[i] / g_time_in_sec);
103 }
104
105 fflush(stdout);
106 free(call_count);
107 }
108
109 int
main(int argc,char ** argv)110 main(int argc, char **argv)
111 {
112 struct spdk_app_opts opts = {};
113 int op;
114 int rc = 0;
115
116 spdk_app_opts_init(&opts, sizeof(opts));
117 opts.name = "event_perf";
118 opts.rpc_addr = NULL;
119
120 g_time_in_sec = 0;
121
122 while ((op = getopt(argc, argv, "m:t:")) != -1) {
123 switch (op) {
124 case 'm':
125 opts.reactor_mask = optarg;
126 break;
127 case 't':
128 g_time_in_sec = spdk_strtol(optarg, 10);
129 if (g_time_in_sec < 0) {
130 fprintf(stderr, "Invalid run time\n");
131 return g_time_in_sec;
132 }
133 break;
134 default:
135 usage(argv[0]);
136 exit(1);
137 }
138 }
139
140 if (!g_time_in_sec) {
141 usage(argv[0]);
142 exit(1);
143 }
144
145 printf("Running I/O for %d seconds...", g_time_in_sec);
146 fflush(stdout);
147
148 rc = spdk_app_start(&opts, event_perf_start, NULL);
149
150 spdk_app_fini();
151 performance_dump(g_time_in_sec);
152
153 printf("done.\n");
154 return rc;
155 }
156