1/**
2 * @file daemon/opd_stats.c
3 * Management of daemon statistics
4 *
5 * @remark Copyright 2002 OProfile authors
6 * @remark Read the file COPYING
7 *
8 * @author John Levon
9 * @author Philippe Elie
10 */
11
12#include "opd_stats.h"
13#include "opd_extended.h"
14#include "oprofiled.h"
15
16#include "op_get_time.h"
17
18#include <dirent.h>
19#include <stdlib.h>
20#include <stdio.h>
21
22unsigned long opd_stats[OPD_MAX_STATS];
23
24/**
25 * print_if - print an integer value read from file filename,
26 * do nothing if the value read == -1 except if force is non-zero
27 */
28static void print_if(char const * fmt, char const * path, char const * filename, int force)
29{
30	int value = opd_read_fs_int(path, filename, 0);
31	if (value != -1 || force)
32		printf(fmt, value);
33}
34
35/**
36 * opd_print_stats - print out latest statistics
37 */
38void opd_print_stats(void)
39{
40	DIR * dir;
41	struct dirent * dirent;
42
43	printf("\n%s\n", op_get_time());
44	printf("\n-- OProfile Statistics --\n");
45	printf("Nr. sample dumps: %lu\n", opd_stats[OPD_DUMP_COUNT]);
46	printf("Nr. non-backtrace samples: %lu\n", opd_stats[OPD_SAMPLES]);
47	printf("Nr. kernel samples: %lu\n", opd_stats[OPD_KERNEL]);
48	printf("Nr. lost samples (no kernel/user): %lu\n", opd_stats[OPD_NO_CTX]);
49	printf("Nr. lost kernel samples: %lu\n", opd_stats[OPD_LOST_KERNEL]);
50	printf("Nr. incomplete code structs: %lu\n", opd_stats[OPD_DANGLING_CODE]);
51	printf("Nr. samples lost due to sample file open failure: %lu\n",
52		opd_stats[OPD_LOST_SAMPLEFILE]);
53	printf("Nr. samples lost due to no permanent mapping: %lu\n",
54		opd_stats[OPD_LOST_NO_MAPPING]);
55	print_if("Nr. event lost due to buffer overflow: %u\n",
56	       "/dev/oprofile/stats", "event_lost_overflow", 1);
57	print_if("Nr. samples lost due to no mapping: %u\n",
58	       "/dev/oprofile/stats", "sample_lost_no_mapping", 1);
59	print_if("Nr. backtraces skipped due to no file mapping: %u\n",
60	       "/dev/oprofile/stats", "bt_lost_no_mapping", 0);
61	print_if("Nr. samples lost due to no mm: %u\n",
62	       "/dev/oprofile/stats", "sample_lost_no_mm", 1);
63
64	opd_ext_print_stats();
65
66	if (!(dir = opendir("/dev/oprofile/stats/")))
67		goto out;
68	while ((dirent = readdir(dir))) {
69		int cpu_nr;
70		char path[256];
71		if (sscanf(dirent->d_name, "cpu%d", &cpu_nr) != 1)
72			continue;
73		snprintf(path, 256, "/dev/oprofile/stats/%s", dirent->d_name);
74
75		printf("\n---- Statistics for cpu : %d\n", cpu_nr);
76		print_if("Nr. samples lost cpu buffer overflow: %u\n",
77		     path, "sample_lost_overflow", 1);
78		print_if("Nr. samples lost task exit: %u\n",
79		     path, "sample_lost_task_exit", 0);
80		print_if("Nr. samples received: %u\n",
81		     path, "sample_received", 1);
82		print_if("Nr. backtrace aborted: %u\n",
83		     path, "backtrace_aborted", 0);
84		print_if("Nr. samples lost invalid pc: %u\n",
85		     path, "sample_invalid_eip", 0);
86	}
87	closedir(dir);
88out:
89	fflush(stdout);
90}
91