@@ -252,6 +252,7 @@ struct cpu_topology {
int physical_node_id;
int logical_node_id; /* 0-based count within the package */
int physical_core_id;
+ int thread_id;
cpu_set_t *put_ids; /* Processing Unit/Thread IDs */
} *cpus;
@@ -2262,44 +2263,6 @@ int parse_int_file(const char *fmt, ...)
return value;
}
-/*
- * get_cpu_position_in_core(cpu)
- * return the position of the CPU among its HT siblings in the core
- * return -1 if the sibling is not in list
- */
-int get_cpu_position_in_core(int cpu)
-{
- char path[64];
- FILE *filep;
- int this_cpu;
- char character;
- int i;
-
- sprintf(path,
- "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list",
- cpu);
- filep = fopen(path, "r");
- if (filep == NULL) {
- perror(path);
- exit(1);
- }
-
- for (i = 0; i < topo.num_threads_per_core; i++) {
- fscanf(filep, "%d", &this_cpu);
- if (this_cpu == cpu) {
- fclose(filep);
- return i;
- }
-
- /* Account for no separator after last thread*/
- if (i != (topo.num_threads_per_core - 1))
- fscanf(filep, "%c", &character);
- }
-
- fclose(filep);
- return -1;
-}
-
/*
* cpu_is_first_core_in_package(cpu)
* return 1 if given CPU is 1st core in package
@@ -2390,11 +2353,15 @@ int get_thread_siblings(struct cpu_topology *thiscpu)
char path[80], character;
FILE *filep;
unsigned long map;
- int shift, sib_core;
+ int so, shift, sib_core;
int cpu = thiscpu->logical_cpu_id;
int offset = topo.max_cpu_num + 1;
+ int thread_id = 0;
+
thiscpu->put_ids = CPU_ALLOC((topo.max_cpu_num + 1));
+ if (thiscpu->thread_id < 0)
+ thiscpu->thread_id = thread_id++;
if (!thiscpu->put_ids)
return -1;
CPU_ZERO(thiscpu->put_ids);
@@ -2407,10 +2374,15 @@ int get_thread_siblings(struct cpu_topology *thiscpu)
fscanf(filep, "%lx%c", &map, &character);
for (shift = 0; shift < BITMASK_SIZE; shift++) {
if ((map >> shift) & 0x1) {
- sib_core = get_core_id(shift + offset);
- if (sib_core == thiscpu->physical_core_id)
- CPU_SET(shift + offset,
- thiscpu->put_ids);
+ so = shift + offset;
+ sib_core = get_core_id(so);
+ if (sib_core == thiscpu->physical_core_id) {
+ CPU_SET(so, thiscpu->put_ids);
+ if ((so != cpu) &&
+ (cpus[so].thread_id < 0))
+ cpus[so].thread_id =
+ thread_id++;
+ }
}
}
} while (!strncmp(&character, ",", 1));
@@ -2531,6 +2503,12 @@ int mark_cpu_present(int cpu)
return 0;
}
+int init_thread_id(int cpu)
+{
+ cpus[cpu].thread_id = -1;
+ return 0;
+}
+
/*
* snapshot_proc_interrupts()
*
@@ -4456,6 +4434,7 @@ void topology_probe()
cpu_affinity_setsize = CPU_ALLOC_SIZE((topo.max_cpu_num + 1));
CPU_ZERO_S(cpu_affinity_setsize, cpu_affinity_set);
+ for_all_proc_cpus(init_thread_id);
/*
* For online cpus
@@ -4491,12 +4470,16 @@ void topology_probe()
siblings = get_thread_siblings(&cpus[i]);
if (siblings > max_siblings)
max_siblings = siblings;
+ if (cpus[i].thread_id != -1)
+ topo.num_cores++;
if (debug > 1)
- fprintf(outf, "cpu %d pkg %d node %d core %d\n",
+ fprintf(outf,
+ "cpu %d pkg %d node %d core %d thread %d\n",
i, cpus[i].physical_package_id,
cpus[i].physical_node_id,
- cpus[i].physical_core_id);
+ cpus[i].physical_core_id,
+ cpus[i].thread_id);
}
topo.num_cores_per_pkg = max_core_id + 1;
@@ -4558,47 +4541,38 @@ allocate_counters(struct thread_data **t, struct core_data **c, struct pkg_data
/*
* init_counter()
*
- * set cpu_id, core_num, pkg_num
* set FIRST_THREAD_IN_CORE and FIRST_CORE_IN_PACKAGE
- *
- * increment topo.num_cores when 1st core in pkg seen
*/
void init_counter(struct thread_data *thread_base, struct core_data *core_base,
- struct pkg_data *pkg_base, int thread_num, int core_num,
- int pkg_num, int cpu_id)
+ struct pkg_data *pkg_base, int cpu_id)
{
+ int pkg_id = cpus[cpu_id].physical_package_id;
+ int core_id = cpus[cpu_id].physical_core_id;
+ int thread_id = cpus[cpu_id].thread_id;
struct thread_data *t;
struct core_data *c;
struct pkg_data *p;
- t = GET_THREAD(thread_base, thread_num, core_num, pkg_num);
- c = GET_CORE(core_base, core_num, pkg_num);
- p = GET_PKG(pkg_base, pkg_num);
+ t = GET_THREAD(thread_base, thread_id, core_id, pkg_id);
+ c = GET_CORE(core_base, core_id, pkg_id);
+ p = GET_PKG(pkg_base, pkg_id);
t->cpu_id = cpu_id;
- if (thread_num == 0) {
+ if (thread_id == 0) {
t->flags |= CPU_IS_FIRST_THREAD_IN_CORE;
if (cpu_is_first_core_in_package(cpu_id))
t->flags |= CPU_IS_FIRST_CORE_IN_PACKAGE;
}
- c->core_id = core_num;
- p->package_id = pkg_num;
+ c->core_id = core_id;
+ p->package_id = pkg_id;
}
int initialize_counters(int cpu_id)
{
- int my_thread_id, my_core_id, my_package_id;
-
- my_package_id = get_physical_package_id(cpu_id);
- my_core_id = get_core_id(cpu_id);
- my_thread_id = get_cpu_position_in_core(cpu_id);
- if (!my_thread_id)
- topo.num_cores++;
-
- init_counter(EVEN_COUNTERS, my_thread_id, my_core_id, my_package_id, cpu_id);
- init_counter(ODD_COUNTERS, my_thread_id, my_core_id, my_package_id, cpu_id);
+ init_counter(EVEN_COUNTERS, cpu_id);
+ init_counter(ODD_COUNTERS, cpu_id);
return 0;
}
The code can be simplified if the cpu_topology *cpus tracks the thread IDs. This removes an additional file lookup and simplifies the counter initialization code. Add thread ID to cpu_topology information and cleanup the counter initialization code. v2: prevent thread_id from being overwritten Signed-off-by: Prarit Bhargava <prarit@redhat.com> Cc: Len Brown <len.brown@intel.com> --- tools/power/x86/turbostat/turbostat.c | 106 +++++++++++++--------------------- 1 file changed, 40 insertions(+), 66 deletions(-)