Add support to monitor CPU temperature

README_devIocStats

@@ -74,6 +74,7 @@ Analog In (ai) Records (DTYP = "IOC stats"), INP = @one of the following:
         sys_cpuload           - estimated percent CPU load on the system 
         no_of_cpus            - number of CPU cores on the system
         ioc_cpuload           - estimated percent CPU utilization by this IOC
+        cpu_temperature       - measured temperature of the CPU (only implemented for Linux IOC)
         fd                    - number of file descriptors currently in use
         maxfd                 - max number of file descriptors
     Note - free_bytes, total_bytes, sys_cpuload, no_of_cpus can be instantiated once per system instead

devIocStats/Makefile

@@ -44,6 +44,7 @@ SRCS += osdBootInfo.c
 SRCS += osdSystemInfo.c
 SRCS += osdHostInfo.c
 SRCS += osdPIDInfo.c
+SRCS += osdCpuTemp.c
 
 OBJS_vxWorks += osdCpuUsageTest.o
 

devIocStats/devIocStats.h

@@ -131,4 +131,7 @@ extern int devIocStatsGetHostname (char **pval);
 extern int devIocStatsGetPID (double *proc_id);
 extern int devIocStatsGetPPID (double *proc_id);
 
+/* CPU Temperature */
+extern int devIocStatsGetCpuTemp (int *pval);
+
 #endif /* devIocStats_H */

devIocStats/devIocStatsAnalog.c

@@ -202,6 +202,7 @@ static void statsWSAllocBytes(double*);
 static void statsWSTotalBytes(double*);
 static void statsCpuUsage(double*);
 static void statsCpuUtilization(double*);
+static void statsCpuTemperature(double*);
 static void statsNoOfCpus(double*);
 static void statsSuspendedTasks(double*);
 static void statsFdUsage(double*);
@@ -231,7 +232,6 @@ static void statsCbMediumQOverruns(double*);
 static void statsCbHighQHiWtrMrk(double*);
 static void statsCbHighQUsed(double*);
 static void statsCbHighQOverruns(double*);
-
 struct {
 	char *name;
 	double scan_rate;
@@ -286,6 +286,7 @@ static validGetParms statsGetParms[]={
 	{ "cbHighQueueHiWtrMrk",	statsCbHighQHiWtrMrk,	QUEUE_TYPE },
 	{ "cbHighQueueUsed",		statsCbHighQUsed,	QUEUE_TYPE },
 	{ "cbHighQueueOverruns",	statsCbHighQOverruns,	QUEUE_TYPE },
+	{ "cpu_temperature", statsCpuTemperature, LOAD_TYPE },
 	{ NULL,NULL,0 }
 };
 
@@ -307,6 +308,7 @@ static scanInfo scan[TOTAL_TYPES] = {{0}};
 static fdInfo fdusage = {0,0};
 static loadInfo loadinfo = {1,0.,0.};
 static int susptasknumber = 0;
+static int cputemperature = 0;
 static int recordnumber = 0;
 static clustInfo clustinfo[2] = {{{0}},{{0}}};
 static int mbufnumber[2] = {0,0};
@@ -385,12 +387,15 @@ static void scan_time(int type)
       {
 	loadInfo loadinfo_local = {1,0.,0.};
 	int      susptasknumber_local = 0;
+  int      cputemperature_local = 0;
         devIocStatsGetCpuUsage(&loadinfo_local);
         devIocStatsGetCpuUtilization(&loadinfo_local);
         devIocStatsGetSuspTasks(&susptasknumber_local);
+        devIocStatsGetCpuTemp(&cputemperature_local);
         epicsMutexLock(scan_mutex);
 	loadinfo       = loadinfo_local;
 	susptasknumber = susptasknumber_local;
+  cputemperature = cputemperature_local;
         epicsMutexUnlock(scan_mutex);
 	break;
       }
@@ -747,6 +752,10 @@ static void statsCpuUtilization(double* val)
 {
     *val = loadinfo.iocLoad;
 }
+static void statsCpuTemperature(double* val)
+{
+    *val = (double)cputemperature/1000.;
+}
 static void statsNoOfCpus(double* val)
 {
     *val = (double)loadinfo.noOfCpus;

devIocStats/os/Linux/osdCpuTemp.c

@@ -0,0 +1,40 @@
+/*************************************************************************\
+* Copyright (c) 2009 Helmholtz-Zentrum Berlin fuer Materialien und Energie.
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution.
+\*************************************************************************/
+
+/* osdCpuTemp.c - Temperature of the CPU: default implementation = do nothing */
+
+/*
+ *  Author: Florian Feldbauer (RUB)
+ *
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <devIocStats.h>
+
+int devIocStatsGetCpuTemp (int *pval) {
+  FILE *pFile = fopen ( "/sys/class/thermal/thermal_zone0/temp", "r" );
+  if( !pFile ) {
+    fprintf( stderr, "\033[31;1m: Could not open file '/sys/class/thermal/thermal_zone0/temp': %s\033[0m\n",
+             strerror( errno ) );
+    return -1;
+  }
+
+  unsigned num = fscanf( pFile, "%d", pval );
+  if ( 1 != num ) {
+    fprintf( stderr, "\033[31;1mCould not parse value\033[0m\n" );
+  }
+  fclose( pFile );
+  return 0;
+}

devIocStats/os/default/osdCpuTemp.c

@@ -0,0 +1,21 @@
+/*************************************************************************\
+* Copyright (c) 2009 Helmholtz-Zentrum Berlin fuer Materialien und Energie.
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution.
+\*************************************************************************/
+
+/* osdCpuTemp.c - Temperature of the CPU: default implementation = do nothing */
+
+/*
+ *  Author: Florian Feldbauer (RUB)
+ *
+ */
+
+#include <devIocStats.h>
+
+int devIocStatsGetCpuTemp (int *pval) { return -1; }