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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/system_info.h>
#include <odp_internal.h>
#include <odp_debug_internal.h>
#include <odp/align.h>
#include <odp/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"
#define HUGE_PAGE_DIR "/sys/kernel/mm/hugepages"
/*
* Report the number of CPUs in the affinity mask of the main thread
*/
static int sysconf_cpu_count(void)
{
cpu_set_t cpuset;
int ret;
ret = pthread_getaffinity_np(pthread_self(),
sizeof(cpuset), &cpuset);
if (ret != 0)
return 0;
return CPU_COUNT(&cpuset);
}
#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 */
sscanf(str, "%i", &size);
}
fclose(file);
return size;
}
#endif
static int huge_page_size(void)
{
DIR *dir;
struct dirent *dirent;
int size = 0;
dir = opendir(HUGE_PAGE_DIR);
if (dir == NULL) {
ODP_ERR("%s not found\n", HUGE_PAGE_DIR);
return 0;
}
while ((dirent = readdir(dir)) != NULL) {
int temp = 0;
sscanf(dirent->d_name, "hugepages-%i", &temp);
if (temp > size)
size = temp;
}
if (closedir(dir)) {
ODP_ERR("closedir failed\n");
return 0;
}
return size*1024;
}
#if defined __x86_64__ || defined __i386__ || defined __OCTEON__ || \
defined __powerpc__
/*
* Analysis of /sys/devices/system/cpu/ files
*/
static int systemcpu(odp_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;
}
odp_global_data.system_info.huge_page_size = huge_page_size();
return 0;
}
#else
/*
* Use sysconf and dummy values in generic case
*/
static int systemcpu(odp_system_info_t *sysinfo)
{
int ret, i;
ret = sysconf_cpu_count();
if (ret == 0) {
ODP_ERR("sysconf_cpu_count failed.\n");
return -1;
}
sysinfo->cpu_count = ret;
sysinfo->huge_page_size = huge_page_size();
/* Dummy values */
sysinfo->cache_line_size = 64;
ODP_DBG("Warning: use dummy values for freq and model string\n");
ODP_DBG("Refer to https://bugs.linaro.org/show_bug.cgi?id=1870\n");
for (i = 0; i < MAX_CPU_NUMBER; i++) {
sysinfo->cpu_hz_max[i] = 1400000000;
strcpy(sysinfo->model_str[i], "UNKNOWN");
}
return 0;
}
#endif
/*
* System info initialisation
*/
int odp_system_info_init(void)
{
FILE *file;
memset(&odp_global_data.system_info, 0, sizeof(odp_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;
}
odp_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.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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