return 0;
}
+static struct cpu_domain_map **build_cpu_domain_map(u32 *schedstat_version, u32 *max_sched_domains,
+ u32 nr)
+{
+ struct domain_info *domain_info;
+ struct cpu_domain_map **cd_map;
+ char dname[16], cpumask[256];
+ char cpulist[1024];
+ char *line = NULL;
+ u32 cpu, domain;
+ u32 dcount = 0;
+ size_t len;
+ FILE *fp;
+
+ fp = fopen("/proc/schedstat", "r");
+ if (!fp) {
+ pr_err("Failed to open /proc/schedstat\n");
+ return NULL;
+ }
+
+ cd_map = zalloc(sizeof(*cd_map) * nr);
+ if (!cd_map)
+ goto out;
+
+ while (getline(&line, &len, fp) > 0) {
+ int retval;
+
+ if (strncmp(line, "version", 7) == 0) {
+ retval = sscanf(line, "version %d\n", schedstat_version);
+ if (retval != 1)
+ continue;
+
+ } else if (strncmp(line, "cpu", 3) == 0) {
+ retval = sscanf(line, "cpu%u %*s", &cpu);
+ if (retval == 1) {
+ cd_map[cpu] = zalloc(sizeof(*cd_map[cpu]));
+ if (!cd_map[cpu])
+ goto out_free_line;
+ cd_map[cpu]->cpu = cpu;
+ } else
+ continue;
+
+ dcount = 0;
+ } else if (strncmp(line, "domain", 6) == 0) {
+ struct domain_info **temp_domains;
+
+ dcount++;
+ temp_domains = realloc(cd_map[cpu]->domains, dcount * sizeof(domain_info));
+ if (!temp_domains)
+ goto out_free_line;
+ else
+ cd_map[cpu]->domains = temp_domains;
+
+ domain_info = zalloc(sizeof(*domain_info));
+ if (!domain_info)
+ goto out_free_line;
+
+ cd_map[cpu]->domains[dcount - 1] = domain_info;
+
+ if (*schedstat_version >= 17) {
+ retval = sscanf(line, "domain%u %s %s %*s", &domain, dname,
+ cpumask);
+ if (retval != 3)
+ continue;
+
+ domain_info->dname = strdup(dname);
+ if (!domain_info->dname)
+ goto out_free_line;
+ } else {
+ retval = sscanf(line, "domain%u %s %*s", &domain, cpumask);
+ if (retval != 2)
+ continue;
+ }
+
+ domain_info->domain = domain;
+ if (domain > *max_sched_domains)
+ *max_sched_domains = domain;
+
+ domain_info->cpumask = strdup(cpumask);
+ if (!domain_info->cpumask)
+ goto out_free_line;
+
+ cpumask_to_cpulist(cpumask, cpulist);
+ domain_info->cpulist = strdup(cpulist);
+ if (!domain_info->cpulist)
+ goto out_free_line;
+
+ cd_map[cpu]->nr_domains = dcount;
+ }
+ }
+
+out_free_line:
+ free(line);
+out:
+ fclose(fp);
+ return cd_map;
+}
+
+static int write_cpu_domain_info(struct feat_fd *ff,
+ struct evlist *evlist __maybe_unused)
+{
+ u32 max_sched_domains = 0, schedstat_version = 0;
+ struct cpu_domain_map **cd_map;
+ u32 i, j, nr, ret;
+
+ nr = cpu__max_present_cpu().cpu;
+
+ cd_map = build_cpu_domain_map(&schedstat_version, &max_sched_domains, nr);
+ if (!cd_map)
+ return -1;
+
+ ret = do_write(ff, &schedstat_version, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ max_sched_domains += 1;
+ ret = do_write(ff, &max_sched_domains, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ for (i = 0; i < nr; i++) {
+ if (!cd_map[i])
+ continue;
+
+ ret = do_write(ff, &cd_map[i]->cpu, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ ret = do_write(ff, &cd_map[i]->nr_domains, sizeof(u32));
+ if (ret < 0)
+ goto out;
+
+ for (j = 0; j < cd_map[i]->nr_domains; j++) {
+ ret = do_write(ff, &cd_map[i]->domains[j]->domain, sizeof(u32));
+ if (ret < 0)
+ goto out;
+ if (schedstat_version >= 17) {
+ ret = do_write_string(ff, cd_map[i]->domains[j]->dname);
+ if (ret < 0)
+ goto out;
+ }
+
+ ret = do_write_string(ff, cd_map[i]->domains[j]->cpumask);
+ if (ret < 0)
+ goto out;
+
+ ret = do_write_string(ff, cd_map[i]->domains[j]->cpulist);
+ if (ret < 0)
+ goto out;
+ }
+ }
+
+out:
+ free_cpu_domain_info(cd_map, schedstat_version, nr);
+ return ret;
+}
+
static void print_hostname(struct feat_fd *ff, FILE *fp)
{
fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
}
}
+static void print_cpu_domain_info(struct feat_fd *ff, FILE *fp)
+{
+ struct cpu_domain_map **cd_map = ff->ph->env.cpu_domain;
+ u32 nr = ff->ph->env.nr_cpus_avail;
+ struct domain_info *d_info;
+ u32 i, j;
+
+ fprintf(fp, "# schedstat version : %u\n", ff->ph->env.schedstat_version);
+ fprintf(fp, "# Maximum sched domains : %u\n", ff->ph->env.max_sched_domains);
+
+ for (i = 0; i < nr; i++) {
+ if (!cd_map[i])
+ continue;
+
+ fprintf(fp, "# cpu : %u\n", cd_map[i]->cpu);
+ fprintf(fp, "# nr_domains : %u\n", cd_map[i]->nr_domains);
+
+ for (j = 0; j < cd_map[i]->nr_domains; j++) {
+ d_info = cd_map[i]->domains[j];
+ if (!d_info)
+ continue;
+
+ fprintf(fp, "# Domain : %u\n", d_info->domain);
+
+ if (ff->ph->env.schedstat_version >= 17)
+ fprintf(fp, "# Domain name : %s\n", d_info->dname);
+
+ fprintf(fp, "# Domain cpu map : %s\n", d_info->cpumask);
+ fprintf(fp, "# Domain cpu list : %s\n", d_info->cpulist);
+ }
+ }
+}
+
static int __event_process_build_id(struct perf_record_header_build_id *bev,
char *filename,
struct perf_session *session)
return ret;
}
+static int process_cpu_domain_info(struct feat_fd *ff, void *data __maybe_unused)
+{
+ u32 schedstat_version, max_sched_domains, cpu, domain, nr_domains;
+ struct perf_env *env = &ff->ph->env;
+ char *dname, *cpumask, *cpulist;
+ struct cpu_domain_map **cd_map;
+ struct domain_info *d_info;
+ u32 nra, nr, i, j;
+ int ret;
+
+ nra = env->nr_cpus_avail;
+ nr = env->nr_cpus_online;
+
+ cd_map = zalloc(sizeof(*cd_map) * nra);
+ if (!cd_map)
+ return -1;
+
+ env->cpu_domain = cd_map;
+
+ ret = do_read_u32(ff, &schedstat_version);
+ if (ret)
+ return ret;
+
+ env->schedstat_version = schedstat_version;
+
+ ret = do_read_u32(ff, &max_sched_domains);
+ if (ret)
+ return ret;
+
+ env->max_sched_domains = max_sched_domains;
+
+ for (i = 0; i < nr; i++) {
+ if (do_read_u32(ff, &cpu))
+ return -1;
+
+ cd_map[cpu] = zalloc(sizeof(*cd_map[cpu]));
+ if (!cd_map[cpu])
+ return -1;
+
+ cd_map[cpu]->cpu = cpu;
+
+ if (do_read_u32(ff, &nr_domains))
+ return -1;
+
+ cd_map[cpu]->nr_domains = nr_domains;
+
+ cd_map[cpu]->domains = zalloc(sizeof(*d_info) * max_sched_domains);
+ if (!cd_map[cpu]->domains)
+ return -1;
+
+ for (j = 0; j < nr_domains; j++) {
+ if (do_read_u32(ff, &domain))
+ return -1;
+
+ d_info = zalloc(sizeof(*d_info));
+ if (!d_info)
+ return -1;
+
+ cd_map[cpu]->domains[domain] = d_info;
+ d_info->domain = domain;
+
+ if (schedstat_version >= 17) {
+ dname = do_read_string(ff);
+ if (!dname)
+ return -1;
+
+ d_info->dname = zalloc(strlen(dname) + 1);
+ if (!d_info->dname)
+ return -1;
+
+ d_info->dname = strdup(dname);
+ }
+
+ cpumask = do_read_string(ff);
+ if (!cpumask)
+ return -1;
+
+ d_info->cpumask = zalloc(strlen(cpumask) + 1);
+ if (!d_info->cpumask)
+ return -1;
+ d_info->cpumask = strdup(cpumask);
+
+ cpulist = do_read_string(ff);
+ if (!cpulist)
+ return -1;
+
+ d_info->cpulist = zalloc(strlen(cpulist) + 1);
+ if (!d_info->cpulist)
+ return -1;
+ d_info->cpulist = strdup(cpulist);
+ }
+ }
+
+ return ret;
+}
+
#define FEAT_OPR(n, func, __full_only) \
[HEADER_##n] = { \
.name = __stringify(n), \
FEAT_OPR(CLOCK_DATA, clock_data, false),
FEAT_OPN(HYBRID_TOPOLOGY, hybrid_topology, true),
FEAT_OPR(PMU_CAPS, pmu_caps, false),
+ FEAT_OPR(CPU_DOMAIN_INFO, cpu_domain_info, true),
};
struct header_print_data {
projects / thirdparty / linux.git / commitdiff
