xref: /openbmc/linux/tools/perf/util/values.c (revision a20eefae) 
1 // SPDX-License-Identifier: GPL-2.0
2 #include <inttypes.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <errno.h>
6 #include <linux/zalloc.h>
7 
8 #include "values.h"
9 #include "debug.h"
10 
11 int perf_read_values_init(struct perf_read_values *values)
12 {
13 	values->threads_max = 16;
14 	values->pid = malloc(values->threads_max * sizeof(*values->pid));
15 	values->tid = malloc(values->threads_max * sizeof(*values->tid));
16 	values->value = zalloc(values->threads_max * sizeof(*values->value));
17 	if (!values->pid || !values->tid || !values->value) {
18 		pr_debug("failed to allocate read_values threads arrays");
19 		goto out_free_pid;
20 	}
21 	values->threads = 0;
22 
23 	values->counters_max = 16;
24 	values->counterrawid = malloc(values->counters_max
25 				      * sizeof(*values->counterrawid));
26 	values->countername = malloc(values->counters_max
27 				     * sizeof(*values->countername));
28 	if (!values->counterrawid || !values->countername) {
29 		pr_debug("failed to allocate read_values counters arrays");
30 		goto out_free_counter;
31 	}
32 	values->counters = 0;
33 
34 	return 0;
35 
36 out_free_counter:
37 	zfree(&values->counterrawid);
38 	zfree(&values->countername);
39 out_free_pid:
40 	zfree(&values->pid);
41 	zfree(&values->tid);
42 	zfree(&values->value);
43 	return -ENOMEM;
44 }
45 
46 void perf_read_values_destroy(struct perf_read_values *values)
47 {
48 	int i;
49 
50 	if (!values->threads_max || !values->counters_max)
51 		return;
52 
53 	for (i = 0; i < values->threads; i++)
54 		zfree(&values->value[i]);
55 	zfree(&values->value);
56 	zfree(&values->pid);
57 	zfree(&values->tid);
58 	zfree(&values->counterrawid);
59 	for (i = 0; i < values->counters; i++)
60 		zfree(&values->countername[i]);
61 	zfree(&values->countername);
62 }
63 
64 static int perf_read_values__enlarge_threads(struct perf_read_values *values)
65 {
66 	int nthreads_max = values->threads_max * 2;
67 	void *npid = realloc(values->pid, nthreads_max * sizeof(*values->pid)),
68 	     *ntid = realloc(values->tid, nthreads_max * sizeof(*values->tid)),
69 	     *nvalue = realloc(values->value, nthreads_max * sizeof(*values->value));
70 
71 	if (!npid || !ntid || !nvalue)
72 		goto out_err;
73 
74 	values->threads_max = nthreads_max;
75 	values->pid = npid;
76 	values->tid = ntid;
77 	values->value = nvalue;
78 	return 0;
79 out_err:
80 	free(npid);
81 	free(ntid);
82 	free(nvalue);
83 	pr_debug("failed to enlarge read_values threads arrays");
84 	return -ENOMEM;
85 }
86 
87 static int perf_read_values__findnew_thread(struct perf_read_values *values,
88 					    u32 pid, u32 tid)
89 {
90 	int i;
91 
92 	for (i = 0; i < values->threads; i++)
93 		if (values->pid[i] == pid && values->tid[i] == tid)
94 			return i;
95 
96 	if (values->threads == values->threads_max) {
97 		i = perf_read_values__enlarge_threads(values);
98 		if (i < 0)
99 			return i;
100 	}
101 
102 	i = values->threads;
103 
104 	values->value[i] = zalloc(values->counters_max * sizeof(**values->value));
105 	if (!values->value[i]) {
106 		pr_debug("failed to allocate read_values counters array");
107 		return -ENOMEM;
108 	}
109 	values->pid[i] = pid;
110 	values->tid[i] = tid;
111 	values->threads = i + 1;
112 
113 	return i;
114 }
115 
116 static int perf_read_values__enlarge_counters(struct perf_read_values *values)
117 {
118 	char **countername;
119 	int i, counters_max = values->counters_max * 2;
120 	u64 *counterrawid = realloc(values->counterrawid, counters_max * sizeof(*values->counterrawid));
121 
122 	if (!counterrawid) {
123 		pr_debug("failed to enlarge read_values rawid array");
124 		goto out_enomem;
125 	}
126 
127 	countername = realloc(values->countername, counters_max * sizeof(*values->countername));
128 	if (!countername) {
129 		pr_debug("failed to enlarge read_values rawid array");
130 		goto out_free_rawid;
131 	}
132 
133 	for (i = 0; i < values->threads; i++) {
134 		u64 *value = realloc(values->value[i], counters_max * sizeof(**values->value));
135 		int j;
136 
137 		if (!value) {
138 			pr_debug("failed to enlarge read_values ->values array");
139 			goto out_free_name;
140 		}
141 
142 		for (j = values->counters_max; j < counters_max; j++)
143 			value[j] = 0;
144 
145 		values->value[i] = value;
146 	}
147 
148 	values->counters_max = counters_max;
149 	values->counterrawid = counterrawid;
150 	values->countername  = countername;
151 
152 	return 0;
153 out_free_name:
154 	free(countername);
155 out_free_rawid:
156 	free(counterrawid);
157 out_enomem:
158 	return -ENOMEM;
159 }
160 
161 static int perf_read_values__findnew_counter(struct perf_read_values *values,
162 					     u64 rawid, const char *name)
163 {
164 	int i;
165 
166 	for (i = 0; i < values->counters; i++)
167 		if (values->counterrawid[i] == rawid)
168 			return i;
169 
170 	if (values->counters == values->counters_max) {
171 		i = perf_read_values__enlarge_counters(values);
172 		if (i)
173 			return i;
174 	}
175 
176 	i = values->counters++;
177 	values->counterrawid[i] = rawid;
178 	values->countername[i] = strdup(name);
179 
180 	return i;
181 }
182 
183 int perf_read_values_add_value(struct perf_read_values *values,
184 				u32 pid, u32 tid,
185 				u64 rawid, const char *name, u64 value)
186 {
187 	int tindex, cindex;
188 
189 	tindex = perf_read_values__findnew_thread(values, pid, tid);
190 	if (tindex < 0)
191 		return tindex;
192 	cindex = perf_read_values__findnew_counter(values, rawid, name);
193 	if (cindex < 0)
194 		return cindex;
195 
196 	values->value[tindex][cindex] += value;
197 	return 0;
198 }
199 
200 static void perf_read_values__display_pretty(FILE *fp,
201 					     struct perf_read_values *values)
202 {
203 	int i, j;
204 	int pidwidth, tidwidth;
205 	int *counterwidth;
206 
207 	counterwidth = malloc(values->counters * sizeof(*counterwidth));
208 	if (!counterwidth) {
209 		fprintf(fp, "INTERNAL ERROR: Failed to allocate counterwidth array\n");
210 		return;
211 	}
212 	tidwidth = 3;
213 	pidwidth = 3;
214 	for (j = 0; j < values->counters; j++)
215 		counterwidth[j] = strlen(values->countername[j]);
216 	for (i = 0; i < values->threads; i++) {
217 		int width;
218 
219 		width = snprintf(NULL, 0, "%d", values->pid[i]);
220 		if (width > pidwidth)
221 			pidwidth = width;
222 		width = snprintf(NULL, 0, "%d", values->tid[i]);
223 		if (width > tidwidth)
224 			tidwidth = width;
225 		for (j = 0; j < values->counters; j++) {
226 			width = snprintf(NULL, 0, "%" PRIu64, values->value[i][j]);
227 			if (width > counterwidth[j])
228 				counterwidth[j] = width;
229 		}
230 	}
231 
232 	fprintf(fp, "# %*s  %*s", pidwidth, "PID", tidwidth, "TID");
233 	for (j = 0; j < values->counters; j++)
234 		fprintf(fp, "  %*s", counterwidth[j], values->countername[j]);
235 	fprintf(fp, "\n");
236 
237 	for (i = 0; i < values->threads; i++) {
238 		fprintf(fp, "  %*d  %*d", pidwidth, values->pid[i],
239 			tidwidth, values->tid[i]);
240 		for (j = 0; j < values->counters; j++)
241 			fprintf(fp, "  %*" PRIu64,
242 				counterwidth[j], values->value[i][j]);
243 		fprintf(fp, "\n");
244 	}
245 	free(counterwidth);
246 }
247 
248 static void perf_read_values__display_raw(FILE *fp,
249 					  struct perf_read_values *values)
250 {
251 	int width, pidwidth, tidwidth, namewidth, rawwidth, countwidth;
252 	int i, j;
253 
254 	tidwidth = 3; /* TID */
255 	pidwidth = 3; /* PID */
256 	namewidth = 4; /* "Name" */
257 	rawwidth = 3; /* "Raw" */
258 	countwidth = 5; /* "Count" */
259 
260 	for (i = 0; i < values->threads; i++) {
261 		width = snprintf(NULL, 0, "%d", values->pid[i]);
262 		if (width > pidwidth)
263 			pidwidth = width;
264 		width = snprintf(NULL, 0, "%d", values->tid[i]);
265 		if (width > tidwidth)
266 			tidwidth = width;
267 	}
268 	for (j = 0; j < values->counters; j++) {
269 		width = strlen(values->countername[j]);
270 		if (width > namewidth)
271 			namewidth = width;
272 		width = snprintf(NULL, 0, "%" PRIx64, values->counterrawid[j]);
273 		if (width > rawwidth)
274 			rawwidth = width;
275 	}
276 	for (i = 0; i < values->threads; i++) {
277 		for (j = 0; j < values->counters; j++) {
278 			width = snprintf(NULL, 0, "%" PRIu64, values->value[i][j]);
279 			if (width > countwidth)
280 				countwidth = width;
281 		}
282 	}
283 
284 	fprintf(fp, "# %*s  %*s  %*s  %*s  %*s\n",
285 		pidwidth, "PID", tidwidth, "TID",
286 		namewidth, "Name", rawwidth, "Raw",
287 		countwidth, "Count");
288 	for (i = 0; i < values->threads; i++)
289 		for (j = 0; j < values->counters; j++)
290 			fprintf(fp, "  %*d  %*d  %*s  %*" PRIx64 "  %*" PRIu64,
291 				pidwidth, values->pid[i],
292 				tidwidth, values->tid[i],
293 				namewidth, values->countername[j],
294 				rawwidth, values->counterrawid[j],
295 				countwidth, values->value[i][j]);
296 }
297 
298 void perf_read_values_display(FILE *fp, struct perf_read_values *values, int raw)
299 {
300 	if (raw)
301 		perf_read_values__display_raw(fp, values);
302 	else
303 		perf_read_values__display_pretty(fp, values);
304 }
305