diff options
Diffstat (limited to '')
-rw-r--r-- | tools/perf/util/cputopo.c | 72 |
1 files changed, 67 insertions, 5 deletions
diff --git a/tools/perf/util/cputopo.c b/tools/perf/util/cputopo.c index 51b429c86f98..1a3ff6449158 100644 --- a/tools/perf/util/cputopo.c +++ b/tools/perf/util/cputopo.c @@ -157,6 +157,67 @@ void cpu_topology__delete(struct cpu_topology *tp) free(tp); } +bool cpu_topology__smt_on(const struct cpu_topology *topology) +{ + for (u32 i = 0; i < topology->core_cpus_lists; i++) { + const char *cpu_list = topology->core_cpus_list[i]; + + /* + * If there is a need to separate siblings in a core then SMT is + * enabled. + */ + if (strchr(cpu_list, ',') || strchr(cpu_list, '-')) + return true; + } + return false; +} + +bool cpu_topology__core_wide(const struct cpu_topology *topology, + const char *user_requested_cpu_list) +{ + struct perf_cpu_map *user_requested_cpus; + + /* + * If user_requested_cpu_list is empty then all CPUs are recorded and so + * core_wide is true. + */ + if (!user_requested_cpu_list) + return true; + + user_requested_cpus = perf_cpu_map__new(user_requested_cpu_list); + /* Check that every user requested CPU is the complete set of SMT threads on a core. */ + for (u32 i = 0; i < topology->core_cpus_lists; i++) { + const char *core_cpu_list = topology->core_cpus_list[i]; + struct perf_cpu_map *core_cpus = perf_cpu_map__new(core_cpu_list); + struct perf_cpu cpu; + int idx; + bool has_first, first = true; + + perf_cpu_map__for_each_cpu(cpu, idx, core_cpus) { + if (first) { + has_first = perf_cpu_map__has(user_requested_cpus, cpu); + first = false; + } else { + /* + * If the first core CPU is user requested then + * all subsequent CPUs in the core must be user + * requested too. If the first CPU isn't user + * requested then none of the others must be + * too. + */ + if (perf_cpu_map__has(user_requested_cpus, cpu) != has_first) { + perf_cpu_map__put(core_cpus); + perf_cpu_map__put(user_requested_cpus); + return false; + } + } + } + perf_cpu_map__put(core_cpus); + } + perf_cpu_map__put(user_requested_cpus); + return true; +} + static bool has_die_topology(void) { char filename[MAXPATHLEN]; @@ -165,7 +226,8 @@ static bool has_die_topology(void) if (uname(&uts) < 0) return false; - if (strncmp(uts.machine, "x86_64", 6)) + if (strncmp(uts.machine, "x86_64", 6) && + strncmp(uts.machine, "s390x", 5)) return false; scnprintf(filename, MAXPATHLEN, DIE_CPUS_FMT, @@ -187,7 +249,7 @@ struct cpu_topology *cpu_topology__new(void) struct perf_cpu_map *map; bool has_die = has_die_topology(); - ncpus = cpu__max_present_cpu(); + ncpus = cpu__max_present_cpu().cpu; /* build online CPU map */ map = perf_cpu_map__new(NULL); @@ -218,7 +280,7 @@ struct cpu_topology *cpu_topology__new(void) tp->core_cpus_list = addr; for (i = 0; i < nr; i++) { - if (!cpu_map__has(map, i)) + if (!perf_cpu_map__has(map, (struct perf_cpu){ .cpu = i })) continue; ret = build_cpu_topology(tp, i); @@ -324,7 +386,7 @@ struct numa_topology *numa_topology__new(void) if (!node_map) goto out; - nr = (u32) node_map->nr; + nr = (u32) perf_cpu_map__nr(node_map); tp = zalloc(sizeof(*tp) + sizeof(tp->nodes[0])*nr); if (!tp) @@ -333,7 +395,7 @@ struct numa_topology *numa_topology__new(void) tp->nr = nr; for (i = 0; i < nr; i++) { - if (load_numa_node(&tp->nodes[i], node_map->map[i])) { + if (load_numa_node(&tp->nodes[i], perf_cpu_map__cpu(node_map, i).cpu)) { numa_topology__delete(tp); tp = NULL; break; |