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examon_sync_plugin.cpp
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examon_sync_plugin.cpp
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/*
* examon_sync_plugin.cpp
*
* Created on: 26.07.2018
* Author: jitschin
*
* Copyright (c) 2018, Technische Universität Dresden, Germany
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 HOLDER 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 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* #include </usr/include/c++/5/string> */
#include <string>
#include <vector>
/* very basic plugin base */
#include <scorep/plugin/plugin.hpp>
/* use phtread */
#include <pthread.h>
/* for gethostname() */
#include <unistd.h>
#include <mosquittopp.h>
#include "examon_metric.cpp"
extern "C" {
#include <math.h>
}
namespace spp = scorep::plugin::policy;
/**
* Score-P Plugin for Examon synchronous variant
*
* It expects to be provided with metric names by Score-P
* which reads those values from environment variable
* SCOREP_METRIC_EXAMON_SYNC_PLUGIN as a comma-separated list
* Do note, that it may also take more environment variables like
* SCOREP_METRIC_EXAMON_SYNC_PLUGIN_BROKER
* SCOREP_METRIC_EXAMON_SYNC_PLUGIN_EXAMON_HOST
* SCOREP_METRIC_EXAMON_SYNC_PLUGIN_CHANNEL
* SCOREP_METRIC_EXAMON_SYNC_PLUGIN_INTERVAL
* for connecting to MQTT and Examon
*
*/
class examon_sync_plugin : public scorep::plugin::base<examon_sync_plugin, spp::per_host, spp::sync,
spp::scorep_clock, spp::synchronize>,
public mosqpp::mosquittopp
{
private:
std::vector<examon_metric> metrics; /**< the metrics that are being tracked */
/**
* invoked by add_metric() to register the desired metric
*/
std::int32_t put_metric(std::string metric_name)
{
std::int32_t biggest_int = 0;
if (0 < metrics.size())
biggest_int = metrics[metrics.size() - 1].get_id();
std::int32_t new_id = biggest_int + 1;
metrics.push_back(examon_metric(new_id, metric_name, channels, false));
return new_id;
}
char* hostname = NULL; /**< the hostname of the system this program runs on */
char* examon_host = NULL; /**< the hostname of the system where examon is running at */
char* connect_host = NULL; /**< the host or address to the system on which MQTT is running */
char* interval_duration = NULL; /**< the delay that is told examon to heed between measurements */
examon_mqtt_path* channels = NULL; /**< a semantic abstraction of Examon topics */
double erg_unit = -1; /**< cache of erg_unit metric value */
bool track_erg_unit = false; /**< whether to subscribe to erg_unit to fetch it's value */
bool is_connected = false; /**< internally, stores if we are connected to MQTT */
bool is_alive = true; /**< internally, stores whether the thread is running */
bool subscribed_to_metrics = false; /**< stores whether it has already invoked subscribe() for the metrics with MQTT */
pthread_t *thread_id = NULL; /**< store the thread */
public:
/**
* initialization of this plugin
*
* Reads out environment variables and connects to
* specified MQTT host, initializes the pthread
*/
examon_sync_plugin()
{
int port = 1883; // default port
int keepalive = 60;
hostname = (char*)malloc(1024);
int rc = gethostname(hostname, 1024);
if (rc)
{
fprintf(stderr, "Could not read hostname of this host, abort imminent.\n");
exit(0);
}
// Read out environment variables
connect_host = getenv("SCOREP_METRIC_EXAMON_SYNC_PLUGIN_BROKER");
examon_host = getenv("SCOREP_METRIC_EXAMON_SYNC_PLUGIN_EXAMON_HOST");
char* config_channel = getenv("SCOREP_METRIC_EXAMON_SYNC_PLUGIN_CHANNEL");
interval_duration = getenv("SCOREP_METRIC_EXAMON_SYNC_PLUGIN_INTERVAL");
if (!connect_host)
connect_host = (char*)"localhost";
if (!examon_host)
examon_host = hostname;
if (!config_channel)
config_channel = (char*)"org/antarex/cluster/testcluster";
if (interval_duration)
{
float dummy_val;
if (1 != sscanf(interval_duration, "%f", &dummy_val))
{
fprintf(stderr,
"Could not parse intervalDuration of \"%s\", not a floating point number\n",
interval_duration);
}
}
channels = new examon_mqtt_path(examon_host, config_channel);
mosqpp::lib_init();
connect(connect_host, port, keepalive);
is_alive = true;
pthread_t thread_structure;
pthread_create(&thread_structure, NULL, &pthread_loop, this);
thread_id = &thread_structure;
}
~examon_sync_plugin()
{
/* close connection to mosquitto */
is_alive = false;
is_connected = false;
disconnect();
delete channels;
free(hostname);
mosqpp::lib_cleanup();
}
/**
* returns if the thread is still running
*/
bool alive()
{
return is_alive;
}
/**
* returns whether there is an active connection to MQTT
*/
bool connected()
{
return is_connected;
}
/**
* loops so that the MQTT connection stays active
*
* Is invoked from the pthread started within the constructor
* will loop until disconnect() is called and then it will
* finish
*/
static void* pthread_loop(void* arg)
{
examon_sync_plugin* myObj = (examon_sync_plugin*)arg;
myObj->loop_forever();
}
/**
* Called internally to subscribe to each metric in MQTT
*/
void subscribe_the_metrics()
{
for (int i = 0; i < metrics.size(); ++i)
{
/* DONE: Make it multi-socket compatible (replace "0" below with "+",
* also implement logic for receiving multiple values at once */
subscribe(NULL, metrics[i].get_full_topic().c_str());
}
}
/**
* Will update all metrics to the specified erg_unit
*/
void update_erg_unit(double erg_unit)
{
for (int i = 0; i < metrics.size(); ++i)
{
metrics[i].set_erg_unit(erg_unit);
}
}
/**
* Called by MQTT once a connection could be established
*/
void on_connect(int rc)
{
if (rc == 0)
{
is_connected = true;
if (interval_duration)
{
char* interval_str = (char*)malloc(100);
strcpy(interval_str, "-s ");
strncpy(interval_str + 3, interval_duration, 95);
publish(NULL, channels->topic_cmd().c_str(), strlen(interval_str), interval_str);
free(interval_str);
}
if (track_erg_unit)
{
subscribe(NULL, channels->topic_erg_units().c_str());
}
}
}
/**
* Called by MQTT when a message has been received
*/
void on_message(const struct mosquitto_message* message)
{
if (channels->starts_with_topic_base(message->topic))
{
if (-1 == erg_unit && channels->is_erg_units(message->topic))
{
if (1 == sscanf((char*)message->payload, "%lf;%*f", &erg_unit))
{
// energy unit
// taken from
// https://github.com/deater/uarch-configure/blob/master/rapl-read/rapl-read.c#L403
// also see http://web.eece.maine.edu/~vweaver/projects/rapl/
erg_unit = pow(0.5, (double)((((int)erg_unit) >> 8) & 0x1f));
unsubscribe(NULL, channels->topic_erg_units().c_str());
update_erg_unit(erg_unit);
}
}
if (0 == strncmp("/data/", message->topic + channels->topic_base().length(), 6))
{
for (int i = 0; i < metrics.size(); ++i)
{
if (metrics[i].metric_matches(message->topic))
{
metrics[i].handle_message(message->topic, (char*)message->payload,
message->payloadlen);
// Don't break here, allow for multiple handling
}
}
}
}
}
/**
* Called by MQTT, not required here
*/
void on_subscribe(int mid, int qos_count, const int* granted_qos)
{
}
/**
* Called by MQTT, not required here
*/
void on_unsubscribe(int mid)
{
}
/**
* Is supposed to return a list of metrics/matching Properties to Score-P
*
* Actually it just tries to check if the specified metric
* does not end with a MQTT-wildcard (i.e. '+' or '#').
* If it does not, it enriches the specified metric with it's unit
* and a description of how it should be displayed (metric_property)
*/
std::vector<scorep::plugin::metric_property>
get_metric_properties(const std::string& metric_parse)
{
/* some cpu metrics:
* tsc, temp_pkg, erg_dram, erg_cores, erg_pkg, erg_units, freq_ref, C2, C3, C6, uclk
* some core metrics:
* aperf, clk_curr, clk_ref, C3, C6, inst, mperf, temp, tsc
* UOPS_RETIRED.RETIRE_SLOTS, CACHE.MISSES, LONGEST_LAT_CACHE.MISS,
* MEM_LOAD_RETIRED.ALL_BRANCHES
* UOPS_ISSUED.ANY, IDQ_UOPS_NOT_DELIVERED.CORE, INT_MISCRECOVERY_CYCLES
*/
std::vector<scorep::plugin::metric_property> found_matches =
std::vector<scorep::plugin::metric_property>();
// revoke paths like cpu/0/+
// or cpu/+/+
// or +/+/+
struct metric_property_return *parsed_pair = preprocess_metric_property(metric_parse);
if(NULL != parsed_pair) {
switch (parsed_pair->metric_type)
{
case EXAMON_METRIC_TYPE::TEMPERATURE:
parsed_pair->props->absolute_point();
break;
case EXAMON_METRIC_TYPE::ENERGY:
parsed_pair->props->accumulated_last();
track_erg_unit = true;
break;
case EXAMON_METRIC_TYPE::FREQUENCY:
parsed_pair->props->absolute_last();
break;
case EXAMON_METRIC_TYPE::UNKNOWN:
parsed_pair->props->accumulated_last();
break;
}
found_matches.push_back(*(parsed_pair->props));
delete parsed_pair;
}
return found_matches;
}
/**
* Receives the desired metrics from Score-P
*
* Receive metrics here, register them internally with a std::int32_t, which will be later used
* by score-p to reference the metric here
**/
int32_t add_metric(const std::string& metric_name)
{
return put_metric(metric_name);
}
/** Will be called for every event in by the measurement environment.
* You may or may not give it a value here.
*
* @param id contains the stored metric informations
* @param p get and save the results
*
**/
template <class Proxy>
bool get_optional_value(std::int32_t id, Proxy& p)
{
if (is_connected)
{
int index = id - 1;
if (0 <= index && index < metrics.size() && metrics[index].get_id() == id)
{
if (metrics[index].has_value())
{
switch(metrics[index].get_output_datatype())
{
case OUTPUT_DATATYPE::DOUBLE:
p.store(metrics[index].get_latest_value());
break;
case OUTPUT_DATATYPE::INT32_T:
case OUTPUT_DATATYPE::INT64_T: /* fall-through */
p.store((std::int64_t) metrics[index].get_latest_value()); // Score-P just knows INT64_T
break;
case OUTPUT_DATATYPE::UINT32_T:
case OUTPUT_DATATYPE::UINT64_T: /* fall-through */
p.store((std::uint64_t) metrics[index].get_latest_value()); // Score-P just knows UINT64_T
break;
}
return true;
}
}
}
return false;
}
/**
* Called by Score-P when the plugin is supposed to start and when it is supposed to end
*/
void synchronize(bool is_responsible, SCOREP_MetricSynchronizationMode sync_mode)
{
if (!subscribed_to_metrics)
{
subscribe_the_metrics();
subscribed_to_metrics = true;
}
}
};
SCOREP_METRIC_PLUGIN_CLASS(examon_sync_plugin, "examon_sync")