mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
![Adrian Hunter](/assets/img/avatar_default.png)
Add a function to return the number of the machine's available CPUs. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Link: http://lkml.kernel.org/r/1526986485-6562-5-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
177 lines
3.7 KiB
C
177 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include "cpumap.h"
|
|
#include "env.h"
|
|
#include "sane_ctype.h"
|
|
#include "util.h"
|
|
#include <errno.h>
|
|
#include <sys/utsname.h>
|
|
|
|
struct perf_env perf_env;
|
|
|
|
void perf_env__exit(struct perf_env *env)
|
|
{
|
|
int i;
|
|
|
|
zfree(&env->hostname);
|
|
zfree(&env->os_release);
|
|
zfree(&env->version);
|
|
zfree(&env->arch);
|
|
zfree(&env->cpu_desc);
|
|
zfree(&env->cpuid);
|
|
zfree(&env->cmdline);
|
|
zfree(&env->cmdline_argv);
|
|
zfree(&env->sibling_cores);
|
|
zfree(&env->sibling_threads);
|
|
zfree(&env->pmu_mappings);
|
|
zfree(&env->cpu);
|
|
|
|
for (i = 0; i < env->nr_numa_nodes; i++)
|
|
cpu_map__put(env->numa_nodes[i].map);
|
|
zfree(&env->numa_nodes);
|
|
|
|
for (i = 0; i < env->caches_cnt; i++)
|
|
cpu_cache_level__free(&env->caches[i]);
|
|
zfree(&env->caches);
|
|
|
|
for (i = 0; i < env->nr_memory_nodes; i++)
|
|
free(env->memory_nodes[i].set);
|
|
zfree(&env->memory_nodes);
|
|
}
|
|
|
|
int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
|
|
{
|
|
int i;
|
|
|
|
/* do not include NULL termination */
|
|
env->cmdline_argv = calloc(argc, sizeof(char *));
|
|
if (env->cmdline_argv == NULL)
|
|
goto out_enomem;
|
|
|
|
/*
|
|
* Must copy argv contents because it gets moved around during option
|
|
* parsing:
|
|
*/
|
|
for (i = 0; i < argc ; i++) {
|
|
env->cmdline_argv[i] = argv[i];
|
|
if (env->cmdline_argv[i] == NULL)
|
|
goto out_free;
|
|
}
|
|
|
|
env->nr_cmdline = argc;
|
|
|
|
return 0;
|
|
out_free:
|
|
zfree(&env->cmdline_argv);
|
|
out_enomem:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int perf_env__read_cpu_topology_map(struct perf_env *env)
|
|
{
|
|
int cpu, nr_cpus;
|
|
|
|
if (env->cpu != NULL)
|
|
return 0;
|
|
|
|
if (env->nr_cpus_avail == 0)
|
|
env->nr_cpus_avail = cpu__max_present_cpu();
|
|
|
|
nr_cpus = env->nr_cpus_avail;
|
|
if (nr_cpus == -1)
|
|
return -EINVAL;
|
|
|
|
env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
|
|
if (env->cpu == NULL)
|
|
return -ENOMEM;
|
|
|
|
for (cpu = 0; cpu < nr_cpus; ++cpu) {
|
|
env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
|
|
env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
|
|
}
|
|
|
|
env->nr_cpus_avail = nr_cpus;
|
|
return 0;
|
|
}
|
|
|
|
static int perf_env__read_arch(struct perf_env *env)
|
|
{
|
|
struct utsname uts;
|
|
|
|
if (env->arch)
|
|
return 0;
|
|
|
|
if (!uname(&uts))
|
|
env->arch = strdup(uts.machine);
|
|
|
|
return env->arch ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int perf_env__read_nr_cpus_avail(struct perf_env *env)
|
|
{
|
|
if (env->nr_cpus_avail == 0)
|
|
env->nr_cpus_avail = cpu__max_present_cpu();
|
|
|
|
return env->nr_cpus_avail ? 0 : -ENOENT;
|
|
}
|
|
|
|
const char *perf_env__raw_arch(struct perf_env *env)
|
|
{
|
|
return env && !perf_env__read_arch(env) ? env->arch : "unknown";
|
|
}
|
|
|
|
int perf_env__nr_cpus_avail(struct perf_env *env)
|
|
{
|
|
return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
|
|
}
|
|
|
|
void cpu_cache_level__free(struct cpu_cache_level *cache)
|
|
{
|
|
free(cache->type);
|
|
free(cache->map);
|
|
free(cache->size);
|
|
}
|
|
|
|
/*
|
|
* Return architecture name in a normalized form.
|
|
* The conversion logic comes from the Makefile.
|
|
*/
|
|
static const char *normalize_arch(char *arch)
|
|
{
|
|
if (!strcmp(arch, "x86_64"))
|
|
return "x86";
|
|
if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
|
|
return "x86";
|
|
if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
|
|
return "sparc";
|
|
if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
|
|
return "arm64";
|
|
if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
|
|
return "arm";
|
|
if (!strncmp(arch, "s390", 4))
|
|
return "s390";
|
|
if (!strncmp(arch, "parisc", 6))
|
|
return "parisc";
|
|
if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
|
|
return "powerpc";
|
|
if (!strncmp(arch, "mips", 4))
|
|
return "mips";
|
|
if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
|
|
return "sh";
|
|
|
|
return arch;
|
|
}
|
|
|
|
const char *perf_env__arch(struct perf_env *env)
|
|
{
|
|
struct utsname uts;
|
|
char *arch_name;
|
|
|
|
if (!env) { /* Assume local operation */
|
|
if (uname(&uts) < 0)
|
|
return NULL;
|
|
arch_name = uts.machine;
|
|
} else
|
|
arch_name = env->arch;
|
|
|
|
return normalize_arch(arch_name);
|
|
}
|