Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include "cpumap.h"
3#include "env.h"
4#include "sane_ctype.h"
5#include "util.h"
6#include <errno.h>
7#include <sys/utsname.h>
8
9struct perf_env perf_env;
10
11void perf_env__exit(struct perf_env *env)
12{
13 int i;
14
15 zfree(&env->hostname);
16 zfree(&env->os_release);
17 zfree(&env->version);
18 zfree(&env->arch);
19 zfree(&env->cpu_desc);
20 zfree(&env->cpuid);
21 zfree(&env->cmdline);
22 zfree(&env->cmdline_argv);
23 zfree(&env->sibling_cores);
24 zfree(&env->sibling_threads);
25 zfree(&env->pmu_mappings);
26 zfree(&env->cpu);
27
28 for (i = 0; i < env->nr_numa_nodes; i++)
29 cpu_map__put(env->numa_nodes[i].map);
30 zfree(&env->numa_nodes);
31
32 for (i = 0; i < env->caches_cnt; i++)
33 cpu_cache_level__free(&env->caches[i]);
34 zfree(&env->caches);
35}
36
37int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
38{
39 int i;
40
41 /* do not include NULL termination */
42 env->cmdline_argv = calloc(argc, sizeof(char *));
43 if (env->cmdline_argv == NULL)
44 goto out_enomem;
45
46 /*
47 * Must copy argv contents because it gets moved around during option
48 * parsing:
49 */
50 for (i = 0; i < argc ; i++) {
51 env->cmdline_argv[i] = argv[i];
52 if (env->cmdline_argv[i] == NULL)
53 goto out_free;
54 }
55
56 env->nr_cmdline = argc;
57
58 return 0;
59out_free:
60 zfree(&env->cmdline_argv);
61out_enomem:
62 return -ENOMEM;
63}
64
65int perf_env__read_cpu_topology_map(struct perf_env *env)
66{
67 int cpu, nr_cpus;
68
69 if (env->cpu != NULL)
70 return 0;
71
72 if (env->nr_cpus_avail == 0)
73 env->nr_cpus_avail = cpu__max_present_cpu();
74
75 nr_cpus = env->nr_cpus_avail;
76 if (nr_cpus == -1)
77 return -EINVAL;
78
79 env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
80 if (env->cpu == NULL)
81 return -ENOMEM;
82
83 for (cpu = 0; cpu < nr_cpus; ++cpu) {
84 env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
85 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
86 }
87
88 env->nr_cpus_avail = nr_cpus;
89 return 0;
90}
91
92void cpu_cache_level__free(struct cpu_cache_level *cache)
93{
94 free(cache->type);
95 free(cache->map);
96 free(cache->size);
97}
98
99/*
100 * Return architecture name in a normalized form.
101 * The conversion logic comes from the Makefile.
102 */
103static const char *normalize_arch(char *arch)
104{
105 if (!strcmp(arch, "x86_64"))
106 return "x86";
107 if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
108 return "x86";
109 if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
110 return "sparc";
111 if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
112 return "arm64";
113 if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
114 return "arm";
115 if (!strncmp(arch, "s390", 4))
116 return "s390";
117 if (!strncmp(arch, "parisc", 6))
118 return "parisc";
119 if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
120 return "powerpc";
121 if (!strncmp(arch, "mips", 4))
122 return "mips";
123 if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
124 return "sh";
125
126 return arch;
127}
128
129const char *perf_env__arch(struct perf_env *env)
130{
131 struct utsname uts;
132 char *arch_name;
133
134 if (!env) { /* Assume local operation */
135 if (uname(&uts) < 0)
136 return NULL;
137 arch_name = uts.machine;
138 } else
139 arch_name = env->arch;
140
141 return normalize_arch(arch_name);
142}