blob: a4fce2729e505021472a172f3ac6f9abe2cd9a37 [file] [log] [blame]
Jin Yao992c7e92017-07-18 20:13:13 +08001#include "perf.h"
2#include "util/util.h"
3#include "util/debug.h"
4#include "util/branch.h"
5
6static bool cross_area(u64 addr1, u64 addr2, int size)
7{
8 u64 align1, align2;
9
10 align1 = addr1 & ~(size - 1);
11 align2 = addr2 & ~(size - 1);
12
13 return (align1 != align2) ? true : false;
14}
15
16#define AREA_4K 4096
17#define AREA_2M (2 * 1024 * 1024)
18
19void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,
20 u64 from, u64 to)
21{
22 if (flags->type == PERF_BR_UNKNOWN || from == 0)
23 return;
24
25 st->counts[flags->type]++;
26
27 if (flags->type == PERF_BR_COND) {
28 if (to > from)
29 st->cond_fwd++;
30 else
31 st->cond_bwd++;
32 }
33
34 if (cross_area(from, to, AREA_2M))
35 st->cross_2m++;
36 else if (cross_area(from, to, AREA_4K))
37 st->cross_4k++;
38}
39
40const char *branch_type_name(int type)
41{
42 const char *branch_names[PERF_BR_MAX] = {
43 "N/A",
44 "COND",
45 "UNCOND",
46 "IND",
47 "CALL",
48 "IND_CALL",
49 "RET",
50 "SYSCALL",
51 "SYSRET",
52 "COND_CALL",
53 "COND_RET"
54 };
55
56 if (type >= 0 && type < PERF_BR_MAX)
57 return branch_names[type];
58
59 return NULL;
60}
61
62void branch_type_stat_display(FILE *fp, struct branch_type_stat *st)
63{
64 u64 total = 0;
65 int i;
66
67 for (i = 0; i < PERF_BR_MAX; i++)
68 total += st->counts[i];
69
70 if (total == 0)
71 return;
72
73 fprintf(fp, "\n#");
74 fprintf(fp, "\n# Branch Statistics:");
75 fprintf(fp, "\n#");
76
77 if (st->cond_fwd > 0) {
78 fprintf(fp, "\n%8s: %5.1f%%",
79 "COND_FWD",
80 100.0 * (double)st->cond_fwd / (double)total);
81 }
82
83 if (st->cond_bwd > 0) {
84 fprintf(fp, "\n%8s: %5.1f%%",
85 "COND_BWD",
86 100.0 * (double)st->cond_bwd / (double)total);
87 }
88
89 if (st->cross_4k > 0) {
90 fprintf(fp, "\n%8s: %5.1f%%",
91 "CROSS_4K",
92 100.0 * (double)st->cross_4k / (double)total);
93 }
94
95 if (st->cross_2m > 0) {
96 fprintf(fp, "\n%8s: %5.1f%%",
97 "CROSS_2M",
98 100.0 * (double)st->cross_2m / (double)total);
99 }
100
101 for (i = 0; i < PERF_BR_MAX; i++) {
102 if (st->counts[i] > 0)
103 fprintf(fp, "\n%8s: %5.1f%%",
104 branch_type_name(i),
105 100.0 *
106 (double)st->counts[i] / (double)total);
107 }
108}
109
110static int count_str_scnprintf(int idx, const char *str, char *bf, int size)
111{
112 return scnprintf(bf, size, "%s%s", (idx) ? " " : " (", str);
113}
114
115int branch_type_str(struct branch_type_stat *st, char *bf, int size)
116{
117 int i, j = 0, printed = 0;
118 u64 total = 0;
119
120 for (i = 0; i < PERF_BR_MAX; i++)
121 total += st->counts[i];
122
123 if (total == 0)
124 return 0;
125
126 if (st->cond_fwd > 0)
127 printed += count_str_scnprintf(j++, "COND_FWD", bf + printed, size - printed);
128
129 if (st->cond_bwd > 0)
130 printed += count_str_scnprintf(j++, "COND_BWD", bf + printed, size - printed);
131
132 for (i = 0; i < PERF_BR_MAX; i++) {
133 if (i == PERF_BR_COND)
134 continue;
135
136 if (st->counts[i] > 0)
137 printed += count_str_scnprintf(j++, branch_type_name(i), bf + printed, size - printed);
138 }
139
140 if (st->cross_4k > 0)
141 printed += count_str_scnprintf(j++, "CROSS_4K", bf + printed, size - printed);
142
143 if (st->cross_2m > 0)
144 printed += count_str_scnprintf(j++, "CROSS_2M", bf + printed, size - printed);
145
146 return printed;
147}