Adds temperature sensor

makefile

 all: mojitos
 
-OBJECTS = mojitos.o counters_individual.o rapl.o network.o load.o infiniband.o
+OBJECTS = mojitos.o counters_individual.o rapl.o network.o load.o infiniband.o temperature.o
 
 mojitos:$(OBJECTS) counters_option.h
 	gcc $(DEBUG) -O3 -Wall -o mojitos $(OBJECTS) -lpowercap

mojitos.c

@@ -30,7 +30,7 @@
 #include "network.h"
 #include "infiniband.h"
 #include "load.h"
-
+#include "temperature.h"
 
 
 
@@ -111,7 +111,7 @@ int main(int argc, char **argv) {
   signal(15, flush);
   
   int c;
-  while ((c = getopt (argc, argv, "ilhftdeoprsu")) != -1 && application==NULL)
+  while ((c = getopt (argc, argv, "ilhcftdeoprsu")) != -1 && application==NULL)
     switch (c) {
     case 'f':
       frequency=atoi(argv[optind]);
@@ -146,6 +146,9 @@ int main(int argc, char **argv) {
     case 'u':
       add_source(init_load, NULL, label_load, get_load, clean_load);
       break;
+    case 'c':
+      add_source(init_temperature, NULL, label_temperature, get_temperature, clean_temperature);
+      break;
     case 's':
       stat_mode=0;
       break;
@@ -155,7 +158,8 @@ int main(int argc, char **argv) {
     default:
       usage(argv);
     }
-  
+
+
   struct timespec ts;
   struct timespec ts_ref;
 

temperature.c

+/*******************************************************
+ Copyright (C) 2018-2021 Georges Da Costa <georges.da-costa@irit.fr>
+
+    This file is part of Mojitos.
+
+    Mojitos is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Mojitos is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with MojitO/S.  If not, see <https://www.gnu.org/licenses/>.
+
+ *******************************************************/
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+
+struct temperature_t {
+  char **label_list;
+  int *fid_list;
+  int nb_elem;
+};
+  
+int get_string(char *filename, char *buffer, int max_size) {
+  int fid = open(filename, O_RDONLY);
+  //printf("Tries to open : %s : %d\n", filename, fid);
+  if(fid == -1)
+    return -1;
+      
+  int nb = read(fid, buffer, max_size);
+  if(nb == -1) {
+    close(fid);
+    return -1;
+  }
+
+  buffer[nb]=0;
+  close(fid);
+  return 0;
+}
+
+void add_to_list(char ***list_name, char *source, int nb_elem) {
+  //printf("Adds: %s\n", source);
+  *list_name = realloc(*list_name, (nb_elem+1)*sizeof(char*));
+  (*list_name)[nb_elem] = malloc(strlen(source)+1);
+  strcpy((*list_name)[nb_elem], source);
+
+}
+
+void add_temperature_sensor(int id_rep, struct temperature_t *state) {
+  static int key=0;
+  static char buffer_filename[512];
+  static char buffer_label[512];
+  
+  int delta = sprintf(buffer_label, "Temp_%d_", key);
+  
+  for(int i=1;;i++) {
+    sprintf(buffer_filename, "/sys/class/hwmon/hwmon%d/temp%d_label", id_rep, i);
+    if(get_string(buffer_filename, buffer_label+delta, 100) == -1)
+      break;
+
+    for(int pos = 0; pos < strlen(buffer_label); pos++) {
+      if (buffer_label[pos] == ' ')  buffer_label[pos] = '_';
+      if (buffer_label[pos] == '\n') buffer_label[pos] = '\0';
+    }
+    add_to_list(&state->label_list, buffer_label, state->nb_elem);
+
+    sprintf(buffer_filename, "/sys/class/hwmon/hwmon%d/temp%d_input", id_rep, i);
+    state->fid_list = realloc(state->fid_list, (state->nb_elem+1)*sizeof(int));
+    state->fid_list[state->nb_elem] = open(buffer_filename, O_RDONLY);
+
+    state->nb_elem++;
+    // printf("%s : %s\n", buffer_label, buffer_filename);
+  }
+  
+  key++;
+}
+
+unsigned int init_temperature(char *args, void** ptr) {
+  struct temperature_t *state = malloc(sizeof(struct temperature_t));
+  state->nb_elem = 0;
+  state->label_list = NULL;
+  state->fid_list = NULL;
+  
+  char base_name[] = "/sys/class/hwmon/hwmon%d/name";
+  static char name[512];
+  static char buffer[512];
+
+  int i = 0;
+  sprintf(name, base_name, i);
+  while(get_string(name, buffer, 8) != -1) {
+    if (strcmp(buffer, "coretemp")==0)
+      add_temperature_sensor(i, state);
+
+    i++;
+    sprintf(name, base_name, i);
+  }
+  *ptr = (void*) state;
+  return state->nb_elem;
+}
+
+unsigned int get_temperature(uint64_t* results, void* ptr) {
+  struct temperature_t *state = (struct temperature_t*)ptr;
+  static char buffer[512];
+  for(int i=0; i<state->nb_elem; i++) {
+    pread(state->fid_list[i], buffer, 100, 0);
+    results[i] = strtoull(buffer, NULL, 10);
+  }
+  return state->nb_elem;
+}
+
+void clean_temperature(void* ptr) {
+  struct temperature_t *state = (struct temperature_t*)ptr;
+  
+  for(int i=0; i<state->nb_elem; i++) {
+    free(state->label_list[i]);
+    close(state->fid_list[i]);
+  }
+  free(state->label_list);
+  free(state->fid_list);
+  free(state);
+}
+
+void label_temperature(char**labels, void* ptr) {
+  struct temperature_t *state = (struct temperature_t*)ptr;
+  for(int i=0; i<state->nb_elem; i++)
+    labels[i] = state->label_list[i];
+}

temperature.h

+/*******************************************************
+ Copyright (C) 2018-2021 Georges Da Costa <georges.da-costa@irit.fr>
+
+    This file is part of Mojitos.
+
+    Mojitos is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Mojitos is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with MojitO/S.  If not, see <https://www.gnu.org/licenses/>.
+
+ *******************************************************/
+
+unsigned int init_temperature(char*, void **);
+unsigned int get_temperature(uint64_t* results, void*);
+void clean_temperature(void *);
+void label_temperature(char **labels, void*);