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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odp_posix_extensions.h>
#include <odp/api/system_info.h>
#include <odp_internal.h>
#include <odp_debug_internal.h>
#include <odp/api/align.h>
#include <odp/api/cpu.h>
#include <pthread.h>
#include <sched.h>
#include <string.h>
#include <stdio.h>
/* sysconf */
#include <unistd.h>
#include <sys/sysinfo.h>
/* opendir, readdir */
#include <sys/types.h>
#include <dirent.h>
#define CACHE_LNSZ_FILE \
"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
/*
* Report the number of logical CPUs detected at boot time
*/
static int sysconf_cpu_count(void)
{
return odp_global_data.num_cpus_installed;
}
#if defined __x86_64__ || defined __i386__ || defined __OCTEON__ || \
defined __powerpc__
/*
* Analysis of /sys/devices/system/cpu/ files
*/
static int systemcpu_cache_line_size(void)
{
FILE *file;
char str[128];
int size = 0;
file = fopen(CACHE_LNSZ_FILE, "rt");
if (file == NULL) {
/* File not found */
return 0;
}
if (fgets(str, sizeof(str), file) != NULL) {
/* Read cache line size */
if (sscanf(str, "%i", &size) != 1)
size = 0;
}
fclose(file);
return size;
}
#else
/*
* Use dummy data if not available from /sys/devices/system/cpu/
*/
static int systemcpu_cache_line_size(void)
{
return 64;
}
#endif
static uint64_t default_huge_page_size(void)
{
char str[1024];
unsigned long sz;
FILE *file;
file = fopen("/proc/meminfo", "rt");
while (fgets(str, sizeof(str), file) != NULL) {
if (sscanf(str, "Hugepagesize: %8lu kB", &sz) == 1) {
ODP_DBG("defaut hp size is %" PRIu64 " kB\n", sz);
fclose(file);
return (uint64_t)sz * 1024;
}
}
ODP_ERR("unable to get default hp size\n");
fclose(file);
return 0;
}
/*
* Analysis of /sys/devices/system/cpu/ files
*/
static int systemcpu(system_info_t *sysinfo)
{
int ret;
ret = sysconf_cpu_count();
if (ret == 0) {
ODP_ERR("sysconf_cpu_count failed.\n");
return -1;
}
sysinfo->cpu_count = ret;
ret = systemcpu_cache_line_size();
if (ret == 0) {
ODP_ERR("systemcpu_cache_line_size failed.\n");
return -1;
}
sysinfo->cache_line_size = ret;
if (ret != ODP_CACHE_LINE_SIZE) {
ODP_ERR("Cache line sizes definitions don't match.\n");
return -1;
}
sysinfo->default_huge_page_size = default_huge_page_size();
return 0;
}
/*
* System info initialisation
*/
int odp_system_info_init(void)
{
FILE *file;
memset(&odp_global_data.system_info, 0, sizeof(system_info_t));
odp_global_data.system_info.page_size = ODP_PAGE_SIZE;
file = fopen("/proc/cpuinfo", "rt");
if (file == NULL) {
ODP_ERR("Failed to open /proc/cpuinfo\n");
return -1;
}
cpuinfo_parser(file, &odp_global_data.system_info);
fclose(file);
if (systemcpu(&odp_global_data.system_info)) {
ODP_ERR("systemcpu failed\n");
return -1;
}
return 0;
}
/*
* System info termination
*/
int odp_system_info_term(void)
{
return 0;
}
/*
*************************
* Public access functions
*************************
*/
uint64_t odp_cpu_hz(void)
{
int id = sched_getcpu();
return odp_cpu_hz_current(id);
}
uint64_t odp_cpu_hz_id(int id)
{
return odp_cpu_hz_current(id);
}
uint64_t odp_cpu_hz_max(void)
{
return odp_cpu_hz_max_id(0);
}
uint64_t odp_cpu_hz_max_id(int id)
{
if (id >= 0 && id < MAX_CPU_NUMBER)
return odp_global_data.system_info.cpu_hz_max[id];
else
return 0;
}
uint64_t odp_sys_huge_page_size(void)
{
return odp_global_data.system_info.default_huge_page_size;
}
uint64_t odp_sys_page_size(void)
{
return odp_global_data.system_info.page_size;
}
const char *odp_cpu_model_str(void)
{
return odp_cpu_model_str_id(0);
}
const char *odp_cpu_model_str_id(int id)
{
if (id >= 0 && id < MAX_CPU_NUMBER)
return odp_global_data.system_info.model_str[id];
else
return NULL;
}
int odp_sys_cache_line_size(void)
{
return odp_global_data.system_info.cache_line_size;
}
int odp_cpu_count(void)
{
return odp_global_data.system_info.cpu_count;
}
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