//! Collect values of counters
static void intel_snb_pcu_collect(struct stats_type *type)
{
int i;
for (i = 0; i < nr_cpus; i++) {
char cpu[80];
int pkg_id = -1;
int core_id = -1;
int smt_id = -1;
int nr_cores = 0;
snprintf(cpu, sizeof(cpu), "%d", i);
topology(cpu, &pkg_id, &core_id, &smt_id, &nr_cores);
if (core_id == 0 && smt_id == 0)
intel_snb_pcu_collect_socket(type, cpu, pkg_id);
}
}
//! Collect values of counters
static void intel_snb_pcu_collect(struct stats_type *type)
{
// CPUs 0 and 8 have core_id 0 on Stampede at least
int i;
for (i = 0; i < nr_cpus; i++) {
char cpu[80];
char core_id_path[80];
int core_id = -1;
char socket[80];
char socket_id_path[80];
int socket_id = -1;
char pcu[80];
/* Only collect uncore counters on core 0 of a socket. */
snprintf(core_id_path, sizeof(core_id_path),
"/sys/devices/system/cpu/cpu%d/topology/core_id", i);
if (pscanf(core_id_path, "%d", &core_id) != 1) {
ERROR("cannot read core id file `%s': %m\n", core_id_path); /* errno */
continue;
}
if (core_id != 0)
continue;
/* Get socket number. */
snprintf(socket_id_path, sizeof(socket_id_path),
"/sys/devices/system/cpu/cpu%d/topology/physical_package_id", i);
if (pscanf(socket_id_path, "%d", &socket_id) != 1) {
ERROR("cannot read socket id file `%s': %m\n", socket_id_path);
continue;
}
snprintf(cpu, sizeof(cpu), "%d", i);
snprintf(socket, sizeof(socket), "%d", socket_id);
if (cpu_is_sandybridge(cpu))
{
snprintf(pcu, sizeof(pcu), "%d", socket_id);
intel_snb_pcu_collect_socket(type, cpu, pcu);
}
}
}