summaryrefslogtreecommitdiffstats
path: root/tools/power/cpupower/utils/helpers/topology.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/power/cpupower/utils/helpers/topology.c')
-rw-r--r--tools/power/cpupower/utils/helpers/topology.c107
1 files changed, 2 insertions, 105 deletions
diff --git a/tools/power/cpupower/utils/helpers/topology.c b/tools/power/cpupower/utils/helpers/topology.c
index 5f9c908..a1a6c60 100644
--- a/tools/power/cpupower/utils/helpers/topology.c
+++ b/tools/power/cpupower/utils/helpers/topology.c
@@ -16,110 +16,7 @@
#include <errno.h>
#include <fcntl.h>
-#include <helpers/helpers.h>
-#include <helpers/sysfs.h>
+#include <cpuidle.h>
-/* returns -1 on failure, 0 on success */
-static int sysfs_topology_read_file(unsigned int cpu, const char *fname, int *result)
-{
- char linebuf[MAX_LINE_LEN];
- char *endp;
- char path[SYSFS_PATH_MAX];
+/* CPU topology/hierarchy parsing ******************/
- snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/topology/%s",
- cpu, fname);
- if (sysfs_read_file(path, linebuf, MAX_LINE_LEN) == 0)
- return -1;
- *result = strtol(linebuf, &endp, 0);
- if (endp == linebuf || errno == ERANGE)
- return -1;
- return 0;
-}
-
-static int __compare(const void *t1, const void *t2)
-{
- struct cpuid_core_info *top1 = (struct cpuid_core_info *)t1;
- struct cpuid_core_info *top2 = (struct cpuid_core_info *)t2;
- if (top1->pkg < top2->pkg)
- return -1;
- else if (top1->pkg > top2->pkg)
- return 1;
- else if (top1->core < top2->core)
- return -1;
- else if (top1->core > top2->core)
- return 1;
- else if (top1->cpu < top2->cpu)
- return -1;
- else if (top1->cpu > top2->cpu)
- return 1;
- else
- return 0;
-}
-
-/*
- * Returns amount of cpus, negative on error, cpu_top must be
- * passed to cpu_topology_release to free resources
- *
- * Array is sorted after ->pkg, ->core, then ->cpu
- */
-int get_cpu_topology(struct cpupower_topology *cpu_top)
-{
- int cpu, last_pkg, cpus = sysconf(_SC_NPROCESSORS_CONF);
-
- cpu_top->core_info = malloc(sizeof(struct cpuid_core_info) * cpus);
- if (cpu_top->core_info == NULL)
- return -ENOMEM;
- cpu_top->pkgs = cpu_top->cores = 0;
- for (cpu = 0; cpu < cpus; cpu++) {
- cpu_top->core_info[cpu].cpu = cpu;
- cpu_top->core_info[cpu].is_online = sysfs_is_cpu_online(cpu);
- if(sysfs_topology_read_file(
- cpu,
- "physical_package_id",
- &(cpu_top->core_info[cpu].pkg)) < 0) {
- cpu_top->core_info[cpu].pkg = -1;
- cpu_top->core_info[cpu].core = -1;
- continue;
- }
- if(sysfs_topology_read_file(
- cpu,
- "core_id",
- &(cpu_top->core_info[cpu].core)) < 0) {
- cpu_top->core_info[cpu].pkg = -1;
- cpu_top->core_info[cpu].core = -1;
- continue;
- }
- }
-
- qsort(cpu_top->core_info, cpus, sizeof(struct cpuid_core_info),
- __compare);
-
- /* Count the number of distinct pkgs values. This works
- because the primary sort of the core_info struct was just
- done by pkg value. */
- last_pkg = cpu_top->core_info[0].pkg;
- for(cpu = 1; cpu < cpus; cpu++) {
- if (cpu_top->core_info[cpu].pkg != last_pkg &&
- cpu_top->core_info[cpu].pkg != -1) {
-
- last_pkg = cpu_top->core_info[cpu].pkg;
- cpu_top->pkgs++;
- }
- }
- if (!(cpu_top->core_info[0].pkg == -1))
- cpu_top->pkgs++;
-
- /* Intel's cores count is not consecutively numbered, there may
- * be a core_id of 3, but none of 2. Assume there always is 0
- * Get amount of cores by counting duplicates in a package
- for (cpu = 0; cpu_top->core_info[cpu].pkg = 0 && cpu < cpus; cpu++) {
- if (cpu_top->core_info[cpu].core == 0)
- cpu_top->cores++;
- */
- return cpus;
-}
-
-void cpu_topology_release(struct cpupower_topology cpu_top)
-{
- free(cpu_top.core_info);
-}
OpenPOWER on IntegriCloud