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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
Out of the code to write the cpu topology map in the perf.data file header. Now if one needs the CPU topology map for the running machine, one needs to call perf_env__read_cpu_topology_map(perf_env) and the info will be stored in perf_env.cpu. For now we're using a global perf_env variable, that will have its contents freed after we run a builtin. v2: Check perf_env__read_cpu_topology_map() return in write_cpu_topology() (Kan Liang) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1441828225-667-5-git-send-email-acme@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
#include "cpumap.h"
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#include "env.h"
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#include "util.h"
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struct perf_env perf_env;
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void perf_env__exit(struct perf_env *env)
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{
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zfree(&env->hostname);
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zfree(&env->os_release);
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zfree(&env->version);
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zfree(&env->arch);
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zfree(&env->cpu_desc);
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zfree(&env->cpuid);
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zfree(&env->cmdline);
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zfree(&env->cmdline_argv);
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zfree(&env->sibling_cores);
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zfree(&env->sibling_threads);
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zfree(&env->numa_nodes);
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zfree(&env->pmu_mappings);
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zfree(&env->cpu);
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}
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int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
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{
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int i;
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/*
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* If env->cmdline_argv has already been set, do not override it. This allows
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* a command to set the cmdline, parse args and then call another
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* builtin function that implements a command -- e.g, cmd_kvm calling
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* cmd_record.
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*/
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if (env->cmdline_argv != NULL)
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return 0;
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/* do not include NULL termination */
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env->cmdline_argv = calloc(argc, sizeof(char *));
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if (env->cmdline_argv == NULL)
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goto out_enomem;
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/*
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* Must copy argv contents because it gets moved around during option
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* parsing:
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*/
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for (i = 0; i < argc ; i++) {
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env->cmdline_argv[i] = argv[i];
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if (env->cmdline_argv[i] == NULL)
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goto out_free;
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}
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env->nr_cmdline = argc;
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return 0;
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out_free:
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zfree(&env->cmdline_argv);
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out_enomem:
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return -ENOMEM;
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}
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int perf_env__read_cpu_topology_map(struct perf_env *env)
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{
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int cpu, nr_cpus;
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if (env->cpu != NULL)
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return 0;
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if (env->nr_cpus_avail == 0)
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env->nr_cpus_avail = sysconf(_SC_NPROCESSORS_CONF);
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nr_cpus = env->nr_cpus_avail;
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if (nr_cpus == -1)
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return -EINVAL;
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env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
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if (env->cpu == NULL)
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return -ENOMEM;
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for (cpu = 0; cpu < nr_cpus; ++cpu) {
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env->cpu[cpu].core_id = cpu_map__get_core_id(cpu);
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env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
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}
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env->nr_cpus_avail = nr_cpus;
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return 0;
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}
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