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GlobalPolicy.cpp
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/*
* Copyright (c) 2015, 2016, 2017, 2018, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY LOG OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <iostream>
#include <fstream>
#include <streambuf>
#include <stdexcept>
#include <string>
#include <sstream>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <system_error>
#include <unistd.h>
#include "contrib/json11/json11.hpp"
#include "geopm_policy.h"
#include "Exception.hpp"
#include "GlobalPolicy.hpp"
#include "PlatformIO.hpp"
#include "PlatformTopo.hpp"
#include "PolicyFlags.hpp"
#include "geopm_version.h"
#include "geopm_env.h"
#include "config.h"
using json11::Json;
extern "C"
{
int geopm_policy_create(const char *in_config,
const char *out_config,
struct geopm_policy_c **policy)
{
int err = 0;
*policy = NULL;
try {
*policy = (struct geopm_policy_c *)
(new geopm::GlobalPolicy(std::string(in_config ? in_config : ""),
std::string(out_config ? out_config : "")));
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_destroy(struct geopm_policy_c *policy)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
delete policy_obj;
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_power(struct geopm_policy_c *policy, int power_budget)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->budget_watts(power_budget);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_mode(struct geopm_policy_c *policy, int mode)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->mode(mode);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_cpu_freq(struct geopm_policy_c *policy, double cpu_hz)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->frequency_hz(cpu_hz);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_full_perf(struct geopm_policy_c *policy, int num_cpu_full_perf)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->num_max_perf(num_cpu_full_perf);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_tdp_percent(struct geopm_policy_c *policy, double percent)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
// round the value to the closest integer
policy_obj->tdp_percent((int)(percent + 0.5));
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_affinity(struct geopm_policy_c *policy, int cpu_affinity)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->affinity(cpu_affinity);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_goal(struct geopm_policy_c *policy, int geo_goal)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->goal(geo_goal);
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_tree_decider(struct geopm_policy_c *policy, const char *description)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->tree_decider(std::string(description));
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_leaf_decider(struct geopm_policy_c *policy, const char *description)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->leaf_decider(std::string(description));
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_platform(struct geopm_policy_c *policy, const char *description)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->platform(std::string(description));
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_write(const struct geopm_policy_c *policy)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->write();
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
int geopm_policy_enforce_static(const struct geopm_policy_c *policy)
{
int err = 0;
try {
geopm::GlobalPolicy *policy_obj = (geopm::GlobalPolicy *)policy;
if (policy_obj == NULL) {
throw geopm::Exception(GEOPM_ERROR_POLICY_NULL, __FILE__, __LINE__);
}
policy_obj->enforce_static_mode();
}
catch (...) {
err = geopm::exception_handler(std::current_exception());
}
return err;
}
}
namespace geopm
{
GlobalPolicy::GlobalPolicy(std::string in_config, std::string out_config)
: m_in_config(in_config)
, m_out_config(out_config)
, m_mode(GEOPM_POLICY_MODE_STATIC)
, m_power_budget_watts(-1)
, m_flags(nullptr)
, m_tree_decider("none")
, m_leaf_decider("none")
, m_platform("rapl")
, m_is_shm_in(false)
, m_is_shm_out(false)
, m_do_read(false)
, m_do_write(false)
{
int shm_id;
int err = 0;
m_flags = std::unique_ptr<IPolicyFlags>(new PolicyFlags(0));
if (!m_out_config.empty()) {
m_do_write = true;
if (m_out_config[0] == '/' && m_out_config.find_last_of('/') == 0) {
m_is_shm_out = true;
mode_t old_mask = umask(0);
shm_id = shm_open(m_out_config.c_str(), O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP| S_IWGRP | S_IROTH| S_IWOTH);
if (shm_id < 0) {
throw Exception("GlobalPolicy: Could not open shared memory region for root policy", errno, __FILE__, __LINE__);
}
err = ftruncate(shm_id, sizeof(struct m_policy_shmem_s));
if (err) {
(void) shm_unlink(m_out_config.c_str());
(void) close(shm_id);
(void) umask(old_mask);
throw Exception("GlobalPolicy: Could not extend shared memory region with ftruncate for policy control", errno, __FILE__, __LINE__);
}
m_policy_shmem_out = (struct m_policy_shmem_s *) mmap(NULL, sizeof(struct m_policy_shmem_s),
PROT_READ | PROT_WRITE, MAP_SHARED, shm_id, 0);
if (m_policy_shmem_out == MAP_FAILED) {
(void) close(shm_id);
(void) umask(old_mask);
throw Exception("GlobalPolicy: Could not map shared memory region for root policy", errno, __FILE__, __LINE__);
}
err = close(shm_id);
if (err) {
munmap(m_policy_shmem_out, sizeof(struct m_policy_shmem_s));
(void) umask(old_mask);
throw Exception("GlobalPolicy: Could not close file descriptor for root policy shared memory region", errno, __FILE__, __LINE__);
}
if (pthread_mutex_init(&(m_policy_shmem_out->lock), NULL) != 0) {
munmap(m_policy_shmem_out, sizeof(struct m_policy_shmem_s));
(void) umask(old_mask);
throw Exception("GlobalPolicy: Could not initialize pthread mutex for shared memory region", errno, __FILE__, __LINE__);
}
umask(old_mask);
}
else if (m_in_config == m_out_config) {
throw Exception("GlobalPolicy::GlobalPolicy(): input config file and output config file cannot be the same", GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
}
if (!m_in_config.empty()) {
m_do_read = true;
if (m_in_config[0] == '/' && m_in_config.find_last_of('/') == 0) {
m_is_shm_in = true;
shm_id = shm_open(m_in_config.c_str(), O_RDWR, 0);
if (shm_id < 0) {
throw Exception("GlobalPolicy: Could not open shared memory region for root policy", errno, __FILE__, __LINE__);
}
m_policy_shmem_in = (struct m_policy_shmem_s *) mmap(NULL, sizeof(struct m_policy_shmem_s),
PROT_READ | PROT_WRITE, MAP_SHARED, shm_id, 0);
if (m_policy_shmem_in == MAP_FAILED) {
(void) close(shm_id);
throw Exception("GlobalPolicy: Could not map shared memory region for root policy", errno, __FILE__, __LINE__);
}
err = close(shm_id);
if (err) {
munmap(m_policy_shmem_in, sizeof(struct m_policy_shmem_s));
throw Exception("GlobalPolicy: Could not close file descriptor for root policy shared memory region", errno, __FILE__, __LINE__);
}
}
read();
}
if (m_in_config.empty() && m_out_config.empty()) {
m_tree_decider = "static_policy";
m_leaf_decider = "static_policy";
}
}
GlobalPolicy::~GlobalPolicy()
{
if (m_do_read && m_is_shm_in) {
if (munmap(m_policy_shmem_in, sizeof(struct geopm_policy_message_s))) {
#ifdef GEOPM_DEBUG
std::cerr << "Warning: " << Exception("GlobalPolicy: Could not unmap root policy shared memory region",
errno ? errno : GEOPM_ERROR_RUNTIME, __FILE__, __LINE__).what() << std::endl;
#endif
}
}
if (m_do_write && m_is_shm_out) {
if (munmap(m_policy_shmem_out, sizeof(struct geopm_policy_message_s))) {
#ifdef GEOPM_DEBUG
std::cerr << "Warning: " << Exception("GlobalPolicy: Could not unmap root policy shared memory region",
errno ? errno : GEOPM_ERROR_RUNTIME, __FILE__, __LINE__).what() << std::endl;
#endif
}
if (shm_unlink(m_out_config.c_str())) {
#ifdef GEOPM_DEBUG
std::cerr << "Warning: " << Exception("GlobalPolicy: Could not unlink shared memory region on GlobalPolicy destruction",
errno ? errno : GEOPM_ERROR_RUNTIME, __FILE__, __LINE__).what() << std::endl;
#endif
}
}
}
int GlobalPolicy::mode(void) const
{
return m_mode;
}
double GlobalPolicy::frequency_hz(void) const
{
return m_flags->frequency_hz();;
}
int GlobalPolicy::tdp_percent(void) const
{
return m_flags->tdp_percent();
}
int GlobalPolicy::budget_watts(void) const
{
return m_power_budget_watts;
}
int GlobalPolicy::affinity(void) const
{
return m_flags->affinity();;
}
int GlobalPolicy::goal(void) const
{
return m_flags->goal();
}
int GlobalPolicy::num_max_perf(void) const
{
return m_flags->num_max_perf();
}
const std::string &GlobalPolicy::tree_decider() const
{
return m_tree_decider;
}
const std::string &GlobalPolicy::leaf_decider() const
{
return m_leaf_decider;
}
const std::string &GlobalPolicy::platform() const
{
return m_platform;
}
void GlobalPolicy::policy_message(struct geopm_policy_message_s &policy_message)
{
if (m_is_shm_in) {
read();
}
policy_message.mode = m_mode;
policy_message.power_budget = m_power_budget_watts;
policy_message.flags = m_flags->flags();
}
void GlobalPolicy::mode(int mode)
{
m_mode = mode;
}
void GlobalPolicy::frequency_hz(double frequency)
{
m_flags->frequency_hz(frequency);
}
void GlobalPolicy::tdp_percent(int percentage)
{
m_flags->tdp_percent(percentage);
}
void GlobalPolicy::budget_watts(int budget)
{
m_power_budget_watts = budget;
}
void GlobalPolicy::affinity(int affinity)
{
m_flags->affinity(affinity);;
}
void GlobalPolicy::goal(int geo_goal)
{
m_flags->goal(geo_goal);
}
void GlobalPolicy::num_max_perf(int num_big_cores)
{
m_flags->num_max_perf(num_big_cores);
}
void GlobalPolicy::tree_decider(const std::string &description)
{
m_tree_decider = description;
}
void GlobalPolicy::leaf_decider(const std::string &description)
{
m_leaf_decider = description;
}
void GlobalPolicy::platform(const std::string &description)
{
m_platform = description;
}
void GlobalPolicy::read(void)
{
if (m_is_shm_in) {
read_shm();
}
else if (m_do_read) {
read_json();
}
check_valid();
}
void GlobalPolicy::read_json(void)
{
std::string policy_string;
std::string value_string;
std::string key_string;
std::string err_string;
std::ifstream config_file_in;
config_file_in.open(m_in_config, std::ifstream::in);
if (!config_file_in.is_open()) {
std::ostringstream ex_str;
ex_str << "GlobalPolicy::read(): input configuration file \""
<< m_in_config << "\" could not be opened";
throw Exception(ex_str.str(), GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
config_file_in.seekg(0, std::ios::end);
size_t file_size = config_file_in.tellg();
if (file_size <= 0) {
throw Exception("GlobalPolicy::read(): input configuration file invalid",
GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
policy_string.reserve(file_size);
config_file_in.seekg(0, std::ios::beg);
policy_string.assign((std::istreambuf_iterator<char>(config_file_in)),
std::istreambuf_iterator<char>());
std::string err;
Json root = Json::parse(policy_string, err);
if (!err.empty() || !root.is_object()) {
throw Exception("GlobalPolicy::read(): detected a malformed json config file: " + err,
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
Json mode_obj;
Json options_obj;
for (const auto &obj : root.object_items()) {
if (obj.first == "mode") {
mode_obj = obj.second;
}
else if (obj.first == "options") {
options_obj = obj.second;
}
else {
throw Exception("GlobalPolicy::read(): unsupported key or malformed json config file",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (!mode_obj.is_null()) {
read_json_mode(&mode_obj);
}
if (!options_obj.is_null()) {
read_json_options(&options_obj);
}
config_file_in.close();
}
void GlobalPolicy::read_json_options(Json *options_obj)
{
std::string value_string;
if (!options_obj->is_object()) {
throw Exception("GlobalPolicy::read(): options expected to be an object type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
for (const auto &obj : options_obj->object_items()) {
std::string key_string = obj.first;
Json subval = obj.second;
if (key_string == "tdp_percent") {
if (subval.is_number()) {
tdp_percent(subval.number_value());
}
else {
throw Exception("GlobalPolicy::read(): tdp_percent expected to be a double type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
else if (key_string == "cpu_hz") {
if (subval.is_number()) {
frequency_hz(subval.number_value());
}
else {
throw Exception("GlobalPolicy::read(): cpu_hz expected to be a double type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
else if (key_string == "num_cpu_max_perf") {
if (subval.is_number() && floor(subval.number_value()) == subval.number_value()) {
num_max_perf(subval.number_value());
}
else {
throw Exception("GlobalPolicy::read(): num_cpu_max_perf expected to be an integer type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
else if (key_string == "affinity") {
if (!subval.is_string()) {
throw Exception("GlobalPolicy::read(): affinity expected to be a string type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::string value_string = subval.string_value();
if (value_string == "compact") {
affinity(GEOPM_POLICY_AFFINITY_COMPACT);
}
else if (value_string == "scatter") {
affinity(GEOPM_POLICY_AFFINITY_SCATTER);
}
else {
std::ostringstream ex_str;
ex_str << "GlobalPolicy: unsupported affinity type: " << value_string;
throw Exception(ex_str.str(), GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
else if (key_string == "power_budget") {
if (subval.is_number()) {
budget_watts(subval.number_value());
}
else {
throw Exception("GlobalPolicy::read(): power_budget expected to be a double type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
else if (key_string == "tree_decider") {
if (!subval.is_string()) {
throw Exception("GlobalPolicy::read(): tree_decider expected to be a string type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::string value_string = subval.string_value();
tree_decider(value_string);
}
else if (key_string == "leaf_decider") {
if (!subval.is_string()) {
throw Exception("GlobalPolicy::read(): leaf_decider expected to be a string type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::string value_string = subval.string_value();
leaf_decider(value_string);
}
else if (key_string == "platform") {
if (!subval.is_string()) {
throw Exception("GlobalPolicy::read(): platform expected to be a string type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::string value_string = subval.string_value();
platform(value_string);
}
else {
std::ostringstream ex_str;
ex_str << "GlobalPolicy::read(): unknown option \"" << key_string << "\"";
throw Exception(ex_str.str(), GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
}
void GlobalPolicy::check_valid(void)
{
if (m_mode == GEOPM_POLICY_MODE_TDP_BALANCE_STATIC) {
if (tdp_percent() < 0 || tdp_percent() > 100) {
throw Exception("GlobalPolicy::check_valid(): percent tdp must be between 0 and 100",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_FREQ_UNIFORM_STATIC) {
if (frequency_hz() < 0) {
throw Exception("GlobalPolicy::check_valid(): frequency is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_FREQ_HYBRID_STATIC) {
if (frequency_hz() < 0) {
throw Exception("GlobalPolicy::check_valid(): frequency is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
if (num_max_perf() < 0) {
throw Exception("GlobalPolicy::check_valid(): number of max perf cpus is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
if (affinity() != GEOPM_POLICY_AFFINITY_COMPACT &&
affinity() != GEOPM_POLICY_AFFINITY_SCATTER) {
throw Exception("GlobalPolicy::check_valid(): affinity must be set to 'scatter' or 'compact'",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_PERF_BALANCE_DYNAMIC) {
if (budget_watts() < 0) {
throw Exception("GlobalPolicy::check_valid(): power budget is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_FREQ_UNIFORM_DYNAMIC) {
if (budget_watts() < 0) {
throw Exception("GlobalPolicy::check_valid(): power budget is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_FREQ_HYBRID_DYNAMIC) {
if (budget_watts() < 0) {
throw Exception("GlobalPolicy::check_valid(): power budget is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
if (num_max_perf() < 0) {
throw Exception("GlobalPolicy::check_valid(): number of max perf cpus is out of bounds",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
if (affinity() != GEOPM_POLICY_AFFINITY_COMPACT &&
affinity() != GEOPM_POLICY_AFFINITY_SCATTER) {
throw Exception("GlobalPolicy::check_valid(): affiniy must be set to 'scatter' or 'compact'",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
if ((m_mode == GEOPM_POLICY_MODE_TDP_BALANCE_STATIC ||
m_mode == GEOPM_POLICY_MODE_FREQ_UNIFORM_STATIC ||
m_mode == GEOPM_POLICY_MODE_FREQ_HYBRID_STATIC) &&
(m_tree_decider != "static_policy" ||
m_leaf_decider != "static_policy")) {
if (m_leaf_decider == "none" && m_tree_decider == "none") {
m_leaf_decider = "static_policy";
m_tree_decider = "static_policy";
}
else {
throw Exception("GlobalPolicy::check_valid(): cannot set mode to static unless the deciders are static",
GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
}
if ((m_mode == GEOPM_POLICY_MODE_PERF_BALANCE_DYNAMIC ||
m_mode == GEOPM_POLICY_MODE_FREQ_UNIFORM_DYNAMIC ||
m_mode == GEOPM_POLICY_MODE_FREQ_HYBRID_DYNAMIC) &&
(m_tree_decider!= "power_balancing" ||
m_leaf_decider != "power_governing")) {
if (m_leaf_decider == "none" && m_tree_decider == "none") {
m_leaf_decider = "power_governing";
m_tree_decider = "power_balancing";
}
else {
throw Exception("GlobalPolicy::check_valid(): dynamic mode does not match the required decider",
GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
}
if (m_mode == GEOPM_POLICY_MODE_STATIC &&
(m_tree_decider != "static_policy" ||
m_leaf_decider != "static_policy")) {
if (m_leaf_decider == "none" && m_tree_decider == "none") {
m_leaf_decider = "static_policy";
m_tree_decider = "static_policy";
}
else {
throw Exception("GlobalPolicy::check_valid(): static mode cannnot set when either the tree or leaf decider are dynamic", GEOPM_ERROR_INVALID, __FILE__, __LINE__);
}
}
}
void GlobalPolicy::read_json_mode(Json *mode_obj)
{
if (!mode_obj->is_string()) {
throw Exception("GlobalPolicy::read(): mode expected to be a string type",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::string value_string = mode_obj->string_value();
if (value_string == "tdp_balance_static") {
m_mode = GEOPM_POLICY_MODE_TDP_BALANCE_STATIC;
}
else if (value_string == "freq_uniform_static") {
m_mode = GEOPM_POLICY_MODE_FREQ_UNIFORM_STATIC;
}
else if (value_string == "freq_hybrid_static") {
m_mode = GEOPM_POLICY_MODE_FREQ_HYBRID_STATIC;
}
else if (value_string == "perf_balance_dynamic") {
m_mode = GEOPM_POLICY_MODE_PERF_BALANCE_DYNAMIC;
}
else if (value_string == "freq_uniform_dynamic") {
m_mode = GEOPM_POLICY_MODE_FREQ_UNIFORM_DYNAMIC;
}
else if (value_string == "freq_hybrid_dynamic") {
m_mode = GEOPM_POLICY_MODE_FREQ_HYBRID_DYNAMIC;
}
else if (value_string == "static") {
m_mode = GEOPM_POLICY_MODE_STATIC;
}
else if (value_string == "dynamic") {
m_mode = GEOPM_POLICY_MODE_DYNAMIC;
}
else {
throw Exception("GlobalPolicy: invalid mode specified", GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
}
void GlobalPolicy::read_shm(void)
{
int err;
err = pthread_mutex_lock(&(m_policy_shmem_in->lock));
if (err) {
throw Exception("GlobalPolicy::read_shm(): Could not lock shared memory region for root of tree",
err, __FILE__, __LINE__);
}
m_mode = m_policy_shmem_in->policy.mode;
m_power_budget_watts = m_policy_shmem_in->policy.power_budget;
m_flags->flags(m_policy_shmem_in->policy.flags);
m_tree_decider = m_policy_shmem_in->plugin.tree_decider;
m_leaf_decider = m_policy_shmem_in->plugin.leaf_decider;
m_platform = m_policy_shmem_in->plugin.platform;
err = pthread_mutex_unlock(&(m_policy_shmem_in->lock));
if (err) {
throw Exception("GlobalPolicy::read(): Could not unlock shared memory region for root of tree",
err, __FILE__, __LINE__);
}
}
void GlobalPolicy::write()
{
if (!m_do_write) {
throw Exception("GlobalPolicy: invalid operation, out_config not specified",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
check_valid();
if (m_is_shm_out) {
write_shm();
}
else {
write_json();
}
}
void GlobalPolicy::write_json(void)
{
Json policy;
Json options;
switch (m_mode) {
case GEOPM_POLICY_MODE_SHUTDOWN:
break;
case GEOPM_POLICY_MODE_TDP_BALANCE_STATIC:
policy = Json::object {
{"mode", "tdp_balance_static"},
{"options", Json::object {
{"tdp_percent", tdp_percent()}}}};
break;
case GEOPM_POLICY_MODE_FREQ_UNIFORM_STATIC:
policy = Json::object {
{"mode", "freq_uniform_static"},
{"options", Json::object {
{"cpu_hz", frequency_hz()}}}};
break;
case GEOPM_POLICY_MODE_FREQ_HYBRID_STATIC:
policy = Json::object {
{"mode", "freq_hybrid_static"},
{"options", Json::object {
{"cpu_hz", frequency_hz()},
{"num_cpu_max_perf", num_max_perf()},
{"affinity", affinity_string(affinity())}}}};
break;
case GEOPM_POLICY_MODE_PERF_BALANCE_DYNAMIC:
policy = Json::object {
{"mode", "perf_balance_dynamic"},
{"options", Json::object {
{"tree_decider", m_tree_decider},
{"leaf_decider", m_leaf_decider},
{"platform", m_platform},
{"power_budget", budget_watts()}}}};
break;
case GEOPM_POLICY_MODE_FREQ_UNIFORM_DYNAMIC:
policy = Json::object {
{"mode", "freq_uniform_dynamic"},
{"options", Json::object {
{"tree_decider", m_tree_decider},
{"leaf_decider", m_leaf_decider},
{"platform", m_platform},
{"power_budget", budget_watts()}}}};
break;
case GEOPM_POLICY_MODE_FREQ_HYBRID_DYNAMIC:
policy = Json::object {
{"mode", "freq_hybrid_dynamic"},
{"options", Json::object {
{"tree_decider", m_tree_decider},
{"leaf_decider", m_leaf_decider},
{"platform", m_platform},
{"power_budget", budget_watts()},
{"num_cpu_max_perf", num_max_perf()},
{"affinity", affinity_string(affinity())}}}};
break;
case GEOPM_POLICY_MODE_STATIC:
policy = Json::object {
{"mode", "static"},
{"options", Json::object {
{"platform", m_platform}}}};
break;
case GEOPM_POLICY_MODE_DYNAMIC:
policy = Json::object {
{"mode", "dynamic"},
{"options", Json::object {
{"tdp_percent", tdp_percent()},
{"cpu_hz", frequency_hz()},
{"num_cpu_max_perf", num_max_perf()},
{"affinity", affinity_string(affinity())},
{"platform", m_platform},
{"power_budget", budget_watts()},
{"tree_decider", m_tree_decider},
{"leaf_decider", m_leaf_decider}}}};
break;
default:
throw Exception("GlobalPolicy: invalid mode specified",
GEOPM_ERROR_FILE_PARSE, __FILE__, __LINE__);
}
std::ofstream config_file_out;
config_file_out.open(m_out_config.c_str(), std::ifstream::out);
config_file_out << policy.dump();
config_file_out.close();
}
void GlobalPolicy::write_shm(void)
{
int err = pthread_mutex_lock(&(m_policy_shmem_out->lock));
if (err) {
throw Exception("GlobalPolicy: Could not lock shared memory region for resource manager",
errno, __FILE__, __LINE__);
}
m_policy_shmem_out->policy.mode = m_mode;
m_policy_shmem_out->policy.power_budget = m_power_budget_watts;
m_policy_shmem_out->policy.flags = m_flags->flags();
m_policy_shmem_out->plugin.tree_decider[NAME_MAX - 1] = '\0';
strncpy(m_policy_shmem_out->plugin.tree_decider, m_tree_decider.c_str(), NAME_MAX - 1);
m_policy_shmem_out->plugin.leaf_decider[NAME_MAX - 1] = '\0';
strncpy(m_policy_shmem_out->plugin.leaf_decider, m_leaf_decider.c_str(), NAME_MAX - 1);
m_policy_shmem_out->plugin.platform[NAME_MAX - 1] = '\0';
strncpy(m_policy_shmem_out->plugin.platform, m_platform.c_str(), NAME_MAX - 1);
err = pthread_mutex_unlock(&(m_policy_shmem_in->lock));
if (err) {
throw Exception("GlobalPolicy: Could not unlock shared memory region for resource manager",
errno, __FILE__, __LINE__);
}
}
std::string GlobalPolicy::affinity_string(int value)
{
std::string name;
switch (value) {
case GEOPM_POLICY_AFFINITY_COMPACT:
name = "compact";
break;
case GEOPM_POLICY_AFFINITY_SCATTER:
name = "scatter";
break;