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Commit | Line | Data |
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a12b51c4 PM |
1 | #include "util.h" |
2 | #include "../perf.h" | |
3 | #include "cpumap.h" | |
4 | #include <assert.h> | |
5 | #include <stdio.h> | |
6 | ||
60d567e2 | 7 | static struct cpu_map *cpu_map__default_new(void) |
a12b51c4 | 8 | { |
60d567e2 ACM |
9 | struct cpu_map *cpus; |
10 | int nr_cpus; | |
a12b51c4 PM |
11 | |
12 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
60d567e2 ACM |
13 | if (nr_cpus < 0) |
14 | return NULL; | |
15 | ||
16 | cpus = malloc(sizeof(*cpus) + nr_cpus * sizeof(int)); | |
17 | if (cpus != NULL) { | |
18 | int i; | |
19 | for (i = 0; i < nr_cpus; ++i) | |
20 | cpus->map[i] = i; | |
a12b51c4 | 21 | |
60d567e2 ACM |
22 | cpus->nr = nr_cpus; |
23 | } | |
a12b51c4 | 24 | |
60d567e2 | 25 | return cpus; |
a12b51c4 PM |
26 | } |
27 | ||
60d567e2 | 28 | static struct cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus) |
a12b51c4 | 29 | { |
60d567e2 ACM |
30 | size_t payload_size = nr_cpus * sizeof(int); |
31 | struct cpu_map *cpus = malloc(sizeof(*cpus) + payload_size); | |
32 | ||
33 | if (cpus != NULL) { | |
34 | cpus->nr = nr_cpus; | |
35 | memcpy(cpus->map, tmp_cpus, payload_size); | |
36 | } | |
37 | ||
38 | return cpus; | |
39 | } | |
40 | ||
7ae92e74 | 41 | struct cpu_map *cpu_map__read(FILE *file) |
60d567e2 ACM |
42 | { |
43 | struct cpu_map *cpus = NULL; | |
a12b51c4 | 44 | int nr_cpus = 0; |
60d567e2 ACM |
45 | int *tmp_cpus = NULL, *tmp; |
46 | int max_entries = 0; | |
a12b51c4 PM |
47 | int n, cpu, prev; |
48 | char sep; | |
49 | ||
a12b51c4 PM |
50 | sep = 0; |
51 | prev = -1; | |
52 | for (;;) { | |
7ae92e74 | 53 | n = fscanf(file, "%u%c", &cpu, &sep); |
a12b51c4 PM |
54 | if (n <= 0) |
55 | break; | |
56 | if (prev >= 0) { | |
60d567e2 ACM |
57 | int new_max = nr_cpus + cpu - prev - 1; |
58 | ||
59 | if (new_max >= max_entries) { | |
60 | max_entries = new_max + MAX_NR_CPUS / 2; | |
61 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
62 | if (tmp == NULL) | |
63 | goto out_free_tmp; | |
64 | tmp_cpus = tmp; | |
65 | } | |
66 | ||
a12b51c4 | 67 | while (++prev < cpu) |
60d567e2 ACM |
68 | tmp_cpus[nr_cpus++] = prev; |
69 | } | |
70 | if (nr_cpus == max_entries) { | |
71 | max_entries += MAX_NR_CPUS; | |
72 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
73 | if (tmp == NULL) | |
74 | goto out_free_tmp; | |
75 | tmp_cpus = tmp; | |
a12b51c4 | 76 | } |
60d567e2 ACM |
77 | |
78 | tmp_cpus[nr_cpus++] = cpu; | |
a12b51c4 PM |
79 | if (n == 2 && sep == '-') |
80 | prev = cpu; | |
81 | else | |
82 | prev = -1; | |
83 | if (n == 1 || sep == '\n') | |
84 | break; | |
85 | } | |
a12b51c4 | 86 | |
60d567e2 ACM |
87 | if (nr_cpus > 0) |
88 | cpus = cpu_map__trim_new(nr_cpus, tmp_cpus); | |
89 | else | |
90 | cpus = cpu_map__default_new(); | |
91 | out_free_tmp: | |
92 | free(tmp_cpus); | |
7ae92e74 YZ |
93 | return cpus; |
94 | } | |
95 | ||
96 | static struct cpu_map *cpu_map__read_all_cpu_map(void) | |
97 | { | |
98 | struct cpu_map *cpus = NULL; | |
99 | FILE *onlnf; | |
100 | ||
101 | onlnf = fopen("/sys/devices/system/cpu/online", "r"); | |
102 | if (!onlnf) | |
103 | return cpu_map__default_new(); | |
104 | ||
105 | cpus = cpu_map__read(onlnf); | |
60d567e2 ACM |
106 | fclose(onlnf); |
107 | return cpus; | |
a12b51c4 | 108 | } |
c45c6ea2 | 109 | |
60d567e2 | 110 | struct cpu_map *cpu_map__new(const char *cpu_list) |
c45c6ea2 | 111 | { |
60d567e2 | 112 | struct cpu_map *cpus = NULL; |
c45c6ea2 SE |
113 | unsigned long start_cpu, end_cpu = 0; |
114 | char *p = NULL; | |
115 | int i, nr_cpus = 0; | |
60d567e2 ACM |
116 | int *tmp_cpus = NULL, *tmp; |
117 | int max_entries = 0; | |
c45c6ea2 SE |
118 | |
119 | if (!cpu_list) | |
60d567e2 | 120 | return cpu_map__read_all_cpu_map(); |
c45c6ea2 SE |
121 | |
122 | if (!isdigit(*cpu_list)) | |
60d567e2 | 123 | goto out; |
c45c6ea2 SE |
124 | |
125 | while (isdigit(*cpu_list)) { | |
126 | p = NULL; | |
127 | start_cpu = strtoul(cpu_list, &p, 0); | |
128 | if (start_cpu >= INT_MAX | |
129 | || (*p != '\0' && *p != ',' && *p != '-')) | |
130 | goto invalid; | |
131 | ||
132 | if (*p == '-') { | |
133 | cpu_list = ++p; | |
134 | p = NULL; | |
135 | end_cpu = strtoul(cpu_list, &p, 0); | |
136 | ||
137 | if (end_cpu >= INT_MAX || (*p != '\0' && *p != ',')) | |
138 | goto invalid; | |
139 | ||
140 | if (end_cpu < start_cpu) | |
141 | goto invalid; | |
142 | } else { | |
143 | end_cpu = start_cpu; | |
144 | } | |
145 | ||
146 | for (; start_cpu <= end_cpu; start_cpu++) { | |
147 | /* check for duplicates */ | |
148 | for (i = 0; i < nr_cpus; i++) | |
60d567e2 | 149 | if (tmp_cpus[i] == (int)start_cpu) |
c45c6ea2 SE |
150 | goto invalid; |
151 | ||
60d567e2 ACM |
152 | if (nr_cpus == max_entries) { |
153 | max_entries += MAX_NR_CPUS; | |
154 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
155 | if (tmp == NULL) | |
156 | goto invalid; | |
157 | tmp_cpus = tmp; | |
158 | } | |
159 | tmp_cpus[nr_cpus++] = (int)start_cpu; | |
c45c6ea2 SE |
160 | } |
161 | if (*p) | |
162 | ++p; | |
163 | ||
164 | cpu_list = p; | |
165 | } | |
c45c6ea2 | 166 | |
60d567e2 ACM |
167 | if (nr_cpus > 0) |
168 | cpus = cpu_map__trim_new(nr_cpus, tmp_cpus); | |
169 | else | |
170 | cpus = cpu_map__default_new(); | |
c45c6ea2 | 171 | invalid: |
60d567e2 ACM |
172 | free(tmp_cpus); |
173 | out: | |
174 | return cpus; | |
175 | } | |
176 | ||
9ae7d335 ACM |
177 | size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp) |
178 | { | |
179 | int i; | |
180 | size_t printed = fprintf(fp, "%d cpu%s: ", | |
181 | map->nr, map->nr > 1 ? "s" : ""); | |
182 | for (i = 0; i < map->nr; ++i) | |
183 | printed += fprintf(fp, "%s%d", i ? ", " : "", map->map[i]); | |
184 | ||
185 | return printed + fprintf(fp, "\n"); | |
186 | } | |
187 | ||
60d567e2 ACM |
188 | struct cpu_map *cpu_map__dummy_new(void) |
189 | { | |
190 | struct cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int)); | |
191 | ||
192 | if (cpus != NULL) { | |
193 | cpus->nr = 1; | |
194 | cpus->map[0] = -1; | |
195 | } | |
196 | ||
197 | return cpus; | |
c45c6ea2 | 198 | } |
915fce20 ACM |
199 | |
200 | void cpu_map__delete(struct cpu_map *map) | |
201 | { | |
202 | free(map); | |
203 | } |