1 /* SPDX-License-Identifier: Apache-2.0
2 * Copyright(c) 2022 Cisco Systems, Inc.
5 #include <vppinfra/format.h>
6 #include <vppinfra/error.h>
7 #include <vppinfra/perfmon/perfmon.h>
8 #include <vppinfra/format_table.h>
10 clib_perfmon_main_t clib_perfmon_main;
12 __clib_export clib_error_t *
13 clib_perfmon_init_by_bundle_name (clib_perfmon_ctx_t *ctx, char *fmt, ...)
15 clib_perfmon_main_t *pm = &clib_perfmon_main;
16 clib_perfmon_bundle_t *b = 0;
18 clib_error_t *err = 0;
22 struct perf_event_attr pe = {
23 .size = sizeof (struct perf_event_attr),
29 .read_format = (PERF_FORMAT_GROUP | PERF_FORMAT_TOTAL_TIME_ENABLED |
30 PERF_FORMAT_TOTAL_TIME_RUNNING),
34 bundle_name = (char *) va_format (0, fmt, &va);
36 vec_add1 (bundle_name, 0);
38 for (clib_perfmon_bundle_reg_t *r = pm->bundle_regs; r; r = r->next)
40 if (strncmp (r->bundle->name, bundle_name, vec_len (bundle_name) - 1))
48 err = clib_error_return (0, "Unknown bundle '%s'", bundle_name);
52 clib_memset_u8 (ctx, 0, sizeof (clib_perfmon_ctx_t));
53 vec_validate_init_empty (ctx->fds, b->n_events - 1, -1);
56 for (int i = 0; i < b->n_events; i++)
58 pe.config = b->config[i];
60 int fd = syscall (__NR_perf_event_open, &pe, /* pid */ 0, /* cpu */ -1,
61 /* group_fd */ group_fd, /* flags */ 0);
64 err = clib_error_return_unix (0, "perf_event_open[%u]", i);
69 fformat (stderr, "perf event %u open, fd %d\n", i, fd);
81 ctx->group_fd = group_fd;
82 ctx->data = vec_new (u64, 3 + b->n_events);
83 ctx->ref_clock = os_cpu_clock_frequency ();
84 vec_validate (ctx->capture_groups, 0);
88 clib_perfmon_free (ctx);
90 vec_free (bundle_name);
95 clib_perfmon_free (clib_perfmon_ctx_t *ctx)
97 clib_perfmon_clear (ctx);
98 vec_free (ctx->captures);
99 vec_free (ctx->capture_groups);
101 for (int i = 0; i < vec_len (ctx->fds); i++)
102 if (ctx->fds[i] > -1)
105 vec_free (ctx->data);
109 clib_perfmon_clear (clib_perfmon_ctx_t *ctx)
111 for (int i = 0; i < vec_len (ctx->captures); i++)
112 vec_free (ctx->captures[i].desc);
113 vec_reset_length (ctx->captures);
114 for (int i = 0; i < vec_len (ctx->capture_groups); i++)
115 vec_free (ctx->capture_groups[i].name);
116 vec_reset_length (ctx->capture_groups);
120 clib_perfmon_capture (clib_perfmon_ctx_t *ctx, u32 n_ops, char *fmt, ...)
122 u32 read_size = (ctx->bundle->n_events + 3) * sizeof (u64);
123 clib_perfmon_capture_t *c;
124 u64 d[CLIB_PERFMON_MAX_EVENTS + 3];
127 if ((read (ctx->group_fd, d, read_size) != read_size))
130 fformat (stderr, "reading of %u bytes failed, %s (%d)\n", read_size,
131 strerror (errno), errno);
137 fformat (stderr, "read events: %lu enabled: %lu running: %lu ", d[0],
139 fformat (stderr, "data: [%lu", d[3]);
140 for (int i = 1; i < ctx->bundle->n_events; i++)
141 fformat (stderr, ", %lu", d[i + 3]);
142 fformat (stderr, "]\n");
145 vec_add2 (ctx->captures, c, 1);
148 c->desc = va_format (0, fmt, &va);
152 c->group = vec_len (ctx->capture_groups) - 1;
153 c->time_enabled = d[1];
154 c->time_running = d[2];
155 for (int i = 0; i < CLIB_PERFMON_MAX_EVENTS; i++)
156 c->data[i] = d[i + 3];
158 return ctx->data + vec_len (ctx->data) - ctx->bundle->n_events;
162 clib_perfmon_capture_group (clib_perfmon_ctx_t *ctx, char *fmt, ...)
164 clib_perfmon_capture_group_t *cg;
167 cg = vec_end (ctx->capture_groups) - 1;
170 vec_add2 (ctx->capture_groups, cg, 1);
173 cg->name = va_format (0, fmt, &va);
179 clib_perfmon_warmup (clib_perfmon_ctx_t *ctx)
181 for (u64 i = 0; i < (u64) ctx->ref_clock; i++)
182 asm inline("" : : "r"(i * i) : "memory");
186 format_perfmon_bundle (u8 *s, va_list *args)
188 clib_perfmon_ctx_t *ctx = va_arg (*args, clib_perfmon_ctx_t *);
189 clib_perfmon_capture_t *c;
190 clib_perfmon_capture_group_t *cg = 0;
191 char **hdr = ctx->bundle->column_headers;
192 table_t _t = {}, *t = &_t;
193 u32 n_row = 0, col = 0;
195 table_add_header_row (t, 0);
197 for (char **h = ctx->bundle->column_headers; h[0]; h++)
200 vec_foreach (c, ctx->captures)
202 if (cg != ctx->capture_groups + c->group)
204 cg = ctx->capture_groups + c->group;
205 table_format_cell (t, col, -1, "%v", cg->name);
206 table_set_cell_align (t, col, -1, TTAA_LEFT);
207 table_set_cell_fg_color (t, col, -1, TTAC_BRIGHT_RED);
209 table_format_cell (t, col, 0, "Ops");
210 table_set_cell_fg_color (t, col, 0, TTAC_BRIGHT_YELLOW);
212 for (int i = 0; i < n_row; i++)
214 table_format_cell (t, col, i + 1, "%s", hdr[i]);
215 table_set_cell_fg_color (t, col, i + 1, TTAC_BRIGHT_YELLOW);
219 table_format_cell (t, col, -1, "%v", c->desc);
220 table_format_cell (t, col, 0, "%7u", c->n_ops);
221 for (int i = 0; i < n_row; i++)
222 table_format_cell (t, col, i + 1, "%U", ctx->bundle->format_fn, ctx, c,
227 s = format (s, "%U", format_table, t);