processes plugin: Remove unused fields from structures
[collectd.git] / src / processes.c
index f029a6c..8ac05a3 100644 (file)
@@ -35,9 +35,9 @@
  **/
 
 #include "collectd.h"
+
 #include "common.h"
 #include "plugin.h"
-#include "configfile.h"
 
 /* Include header files for the mach system, if they exist.. */
 #if HAVE_THREAD_INFO
@@ -170,13 +170,9 @@ typedef struct procstat_entry_s
        unsigned long vmem_code;
        unsigned long stack_size;
 
-       unsigned long vmem_minflt;
-       unsigned long vmem_majflt;
        derive_t      vmem_minflt_counter;
        derive_t      vmem_majflt_counter;
 
-       unsigned long cpu_user;
-       unsigned long cpu_system;
        derive_t      cpu_user_counter;
        derive_t      cpu_system_counter;
 
@@ -367,36 +363,31 @@ static int ps_list_match (const char *name, const char *cmdline, procstat_t *ps)
 } /* int ps_list_match */
 
 static void ps_update_counter (_Bool init, derive_t *group_counter,
-                               derive_t *curr_counter, unsigned long *curr_value,
-                               derive_t new_counter, unsigned long new_value)
+                               derive_t *curr_counter, derive_t new_counter)
 {
+       unsigned long curr_value;
+       
        if (init)
-       {
-               *curr_value = new_value;
-               *curr_counter += new_value;
-               *group_counter += new_value;
                return;
-       }
 
        if (new_counter < *curr_counter)
-               *curr_value = new_counter + (ULONG_MAX - *curr_counter);
+               curr_value = new_counter + (ULONG_MAX - *curr_counter);
        else
-               *curr_value = new_counter - *curr_counter;
+               curr_value = new_counter - *curr_counter;
 
        *curr_counter = new_counter;
-       *group_counter += *curr_value;
+       *group_counter += curr_value;
 }
 
 /* add process entry to 'instances' of process 'name' (or refresh it) */
 static void ps_list_add (const char *name, const char *cmdline, procstat_entry_t *entry)
 {
-       procstat_t *ps;
        procstat_entry_t *pse;
 
        if (entry->id == 0)
                return;
 
-       for (ps = list_head_g; ps != NULL; ps = ps->next)
+       for (procstat_t *ps = list_head_g; ps != NULL; ps = ps->next)
        {
                _Bool want_init;
 
@@ -459,34 +450,33 @@ static void ps_list_add (const char *name, const char *cmdline, procstat_entry_t
                                && (entry->vmem_majflt_counter == 0);
                ps_update_counter (want_init,
                                &ps->vmem_minflt_counter,
-                               &pse->vmem_minflt_counter, &pse->vmem_minflt,
-                               entry->vmem_minflt_counter, entry->vmem_minflt);
+                               &pse->vmem_minflt_counter,
+                               entry->vmem_minflt_counter);
                ps_update_counter (want_init,
                                &ps->vmem_majflt_counter,
-                               &pse->vmem_majflt_counter, &pse->vmem_majflt,
-                               entry->vmem_majflt_counter, entry->vmem_majflt);
+                               &pse->vmem_majflt_counter,
+                               entry->vmem_majflt_counter);
 
                want_init = (entry->cpu_user_counter == 0)
                                && (entry->cpu_system_counter == 0);
                ps_update_counter (want_init,
                                &ps->cpu_user_counter,
-                               &pse->cpu_user_counter, &pse->cpu_user,
-                               entry->cpu_user_counter, entry->cpu_user);
+                               &pse->cpu_user_counter,
+                               entry->cpu_user_counter);
                ps_update_counter (want_init,
                                &ps->cpu_system_counter,
-                               &pse->cpu_system_counter, &pse->cpu_system,
-                               entry->cpu_system_counter, entry->cpu_system);
+                               &pse->cpu_system_counter,
+                               entry->cpu_system_counter);
        }
 }
 
 /* remove old entries from instances of processes in list_head_g */
 static void ps_list_reset (void)
 {
-       procstat_t *ps;
        procstat_entry_t *pse;
        procstat_entry_t *pse_prev;
 
-       for (ps = list_head_g; ps != NULL; ps = ps->next)
+       for (procstat_t *ps = list_head_g; ps != NULL; ps = ps->next)
        {
                ps->num_proc    = 0;
                ps->num_lwp     = 0;
@@ -538,15 +528,13 @@ static void ps_list_reset (void)
 /* put all pre-defined 'Process' names from config to list_head_g tree */
 static int ps_config (oconfig_item_t *ci)
 {
-       int i;
-
 #if KERNEL_LINUX
        const size_t max_procname_len = 15;
 #elif KERNEL_SOLARIS || KERNEL_FREEBSD
        const size_t max_procname_len = MAXCOMLEN -1;
 #endif
 
-       for (i = 0; i < ci->children_num; ++i) {
+       for (int i = 0; i < ci->children_num; ++i) {
                oconfig_item_t *c = ci->children + i;
 
                if (strcasecmp (c->key, "Process") == 0)
@@ -664,14 +652,10 @@ static int ps_init (void)
 /* submit global state (e.g.: qty of zombies, running, etc..) */
 static void ps_submit_state (const char *state, double value)
 {
-       value_t values[1];
        value_list_t vl = VALUE_LIST_INIT;
 
-       values[0].gauge = value;
-
-       vl.values = values;
+       vl.values = &(value_t) { .gauge = value };
        vl.values_len = 1;
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
        sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
        sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
        sstrncpy (vl.type, "ps_state", sizeof (vl.type));
@@ -683,12 +667,10 @@ static void ps_submit_state (const char *state, double value)
 /* submit info about specific process (e.g.: memory taken, cpu usage, etc..) */
 static void ps_submit_proc_list (procstat_t *ps)
 {
-       value_t values[2];
        value_list_t vl = VALUE_LIST_INIT;
+       value_t values[2];
 
        vl.values = values;
-       vl.values_len = 2;
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
        sstrncpy (vl.plugin, "processes", sizeof (vl.plugin));
        sstrncpy (vl.plugin_instance, ps->name, sizeof (vl.plugin_instance));
 
@@ -788,14 +770,10 @@ static void ps_submit_proc_list (procstat_t *ps)
 #if KERNEL_LINUX || KERNEL_SOLARIS
 static void ps_submit_fork_rate (derive_t value)
 {
-       value_t values[1];
        value_list_t vl = VALUE_LIST_INIT;
 
-       values[0].derive = value;
-
-       vl.values = values;
+       vl.values = &(value_t) { .derive = value };
        vl.values_len = 1;
-       sstrncpy(vl.host, hostname_g, sizeof (vl.host));
        sstrncpy(vl.plugin, "processes", sizeof (vl.plugin));
        sstrncpy(vl.plugin_instance, "", sizeof (vl.plugin_instance));
        sstrncpy(vl.type, "fork_rate", sizeof (vl.type));
@@ -1467,13 +1445,12 @@ static int ps_read_process(long pid, procstat_t *ps, char *state)
 static int read_fork_rate (void)
 {
        extern kstat_ctl_t *kc;
-       kstat_t *ksp_chain = NULL;
        derive_t result = 0;
 
        if (kc == NULL)
                return (-1);
 
-       for (ksp_chain = kc->kc_chain;
+       for (kstat_t *ksp_chain = kc->kc_chain;
                        ksp_chain != NULL;
                        ksp_chain = ksp_chain->ks_next)
        {
@@ -1539,17 +1516,14 @@ static int ps_read (void)
 #if HAVE_THREAD_INFO
        kern_return_t            status;
 
-       int                      pset;
        processor_set_t          port_pset_priv;
 
-       int                      task;
        task_array_t             task_list;
        mach_msg_type_number_t   task_list_len;
 
        int                      task_pid;
        char                     task_name[MAXCOMLEN + 1];
 
-       int                      thread;
        thread_act_array_t       thread_list;
        mach_msg_type_number_t   thread_list_len;
        thread_basic_info_data_t thread_data;
@@ -1574,7 +1548,7 @@ static int ps_read (void)
         * Tasks are assigned to sets of processors, so that's where you go to
         * get a list.
         */
-       for (pset = 0; pset < pset_list_len; pset++)
+       for (mach_msg_type_number_t pset = 0; pset < pset_list_len; pset++)
        {
                if ((status = host_processor_set_priv (port_host_self,
                                                pset_list[pset],
@@ -1595,7 +1569,7 @@ static int ps_read (void)
                        continue;
                }
 
-               for (task = 0; task < task_list_len; task++)
+               for (mach_msg_type_number_t task = 0; task < task_list_len; task++)
                {
                        ps = NULL;
                        if (mach_get_task_name (task_list[task],
@@ -1693,7 +1667,7 @@ static int ps_read (void)
                                continue; /* with next task_list */
                        }
 
-                       for (thread = 0; thread < thread_list_len; thread++)
+                       for (mach_msg_type_number_t thread = 0; thread < thread_list_len; thread++)
                        {
                                thread_data_len = THREAD_BASIC_INFO_COUNT;
                                status = thread_info (thread_list[thread],
@@ -1824,8 +1798,6 @@ static int ps_read (void)
        procstat_entry_t pse;
        char       state;
 
-       procstat_t *ps_ptr;
-
        running = sleeping = zombies = stopped = paging = blocked = 0;
        ps_list_reset ();
 
@@ -1864,14 +1836,10 @@ static int ps_read (void)
                pse.vmem_code  = ps.vmem_code;
                pse.stack_size = ps.stack_size;
 
-               pse.vmem_minflt = 0;
                pse.vmem_minflt_counter = ps.vmem_minflt_counter;
-               pse.vmem_majflt = 0;
                pse.vmem_majflt_counter = ps.vmem_majflt_counter;
 
-               pse.cpu_user = 0;
                pse.cpu_user_counter = ps.cpu_user_counter;
-               pse.cpu_system = 0;
                pse.cpu_system_counter = ps.cpu_system_counter;
 
                pse.io_rchar = ps.io_rchar;
@@ -1906,7 +1874,7 @@ static int ps_read (void)
        ps_submit_state ("paging",   paging);
        ps_submit_state ("blocked",  blocked);
 
-       for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
+       for (procstat_t *ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
                ps_submit_proc_list (ps_ptr);
 
        read_fork_rate();
@@ -1926,9 +1894,7 @@ static int ps_read (void)
        struct kinfo_proc *procs;          /* array of processes */
        struct kinfo_proc *proc_ptr = NULL;
        int count;                         /* returns number of processes */
-       int i;
 
-       procstat_t *ps_ptr;
        procstat_entry_t pse;
 
        ps_list_reset ();
@@ -1953,7 +1919,7 @@ static int ps_read (void)
        }
 
        /* Iterate through the processes in kinfo_proc */
-       for (i = 0; i < count; i++)
+       for (int i = 0; i < count; i++)
        {
                /* Create only one process list entry per _process_, i.e.
                 * filter out threads (duplicate PID entries). */
@@ -1998,13 +1964,9 @@ static int ps_read (void)
                        pse.vmem_data = procs[i].ki_dsize * pagesize;
                        pse.vmem_code = procs[i].ki_tsize * pagesize;
                        pse.stack_size = procs[i].ki_ssize * pagesize;
-                       pse.vmem_minflt = 0;
                        pse.vmem_minflt_counter = procs[i].ki_rusage.ru_minflt;
-                       pse.vmem_majflt = 0;
                        pse.vmem_majflt_counter = procs[i].ki_rusage.ru_majflt;
 
-                       pse.cpu_user = 0;
-                       pse.cpu_system = 0;
                        pse.cpu_user_counter = 0;
                        pse.cpu_system_counter = 0;
                        /*
@@ -2056,7 +2018,7 @@ static int ps_read (void)
        ps_submit_state ("idle",     idle);
        ps_submit_state ("wait",     wait);
 
-       for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
+       for (procstat_t *ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
                ps_submit_proc_list (ps_ptr);
 /* #endif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_FREEBSD */
 
@@ -2074,9 +2036,7 @@ static int ps_read (void)
        struct kinfo_proc *procs;          /* array of processes */
        struct kinfo_proc *proc_ptr = NULL;
        int count;                         /* returns number of processes */
-       int i;
 
-       procstat_t *ps_ptr;
        procstat_entry_t pse;
 
        ps_list_reset ();
@@ -2101,7 +2061,7 @@ static int ps_read (void)
        }
 
        /* Iterate through the processes in kinfo_proc */
-       for (i = 0; i < count; i++)
+       for (int i = 0; i < count; i++)
        {
                /* Create only one process list entry per _process_, i.e.
                 * filter out threads (duplicate PID entries). */
@@ -2146,13 +2106,9 @@ static int ps_read (void)
                        pse.vmem_code = procs[i].p_vm_tsize * pagesize;
                        pse.stack_size = procs[i].p_vm_ssize * pagesize;
                        pse.vmem_size = pse.stack_size + pse.vmem_code + pse.vmem_data;
-                       pse.vmem_minflt = 0;
                        pse.vmem_minflt_counter = procs[i].p_uru_minflt;
-                       pse.vmem_majflt = 0;
                        pse.vmem_majflt_counter = procs[i].p_uru_majflt;
 
-                       pse.cpu_user = 0;
-                       pse.cpu_system = 0;
                        pse.cpu_user_counter = procs[i].p_uutime_usec +
                                                (1000000lu * procs[i].p_uutime_sec);
                        pse.cpu_system_counter = procs[i].p_ustime_usec +
@@ -2193,7 +2149,7 @@ static int ps_read (void)
        ps_submit_state ("idle",     idle);
        ps_submit_state ("dead",     dead);
 
-       for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
+       for (procstat_t *ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
                ps_submit_proc_list (ps_ptr);
 /* #endif HAVE_LIBKVM_GETPROCS && HAVE_STRUCT_KINFO_PROC_OPENBSD */
 
@@ -2209,7 +2165,6 @@ static int ps_read (void)
        pid_t pindex = 0;
        int nprocs;
 
-       procstat_t *ps;
        procstat_entry_t pse;
 
        ps_list_reset ();
@@ -2217,9 +2172,7 @@ static int ps_read (void)
                                        /* fdsinfo = */ NULL, sizeof(struct fdsinfo64),
                                        &pindex, MAXPROCENTRY)) > 0)
        {
-               int i;
-
-               for (i = 0; i < nprocs; i++)
+               for (int i = 0; i < nprocs; i++)
                {
                        tid64_t thindex;
                        int nthreads;
@@ -2287,7 +2240,6 @@ static int ps_read (void)
                                        break;
                        }
 
-                       pse.cpu_user = 0;
                        /* tv_usec is nanosec ??? */
                        pse.cpu_user_counter = procentry[i].pi_ru.ru_utime.tv_sec * 1000000 +
                                procentry[i].pi_ru.ru_utime.tv_usec / 1000;
@@ -2297,9 +2249,7 @@ static int ps_read (void)
                        pse.cpu_system_counter = procentry[i].pi_ru.ru_stime.tv_sec * 1000000 +
                                procentry[i].pi_ru.ru_stime.tv_usec / 1000;
 
-                       pse.vmem_minflt = 0;
                        pse.vmem_minflt_counter = procentry[i].pi_minflt;
-                       pse.vmem_majflt = 0;
                        pse.vmem_majflt_counter = procentry[i].pi_majflt;
 
                        pse.vmem_size = procentry[i].pi_tsize + procentry[i].pi_dvm * pagesize;
@@ -2330,7 +2280,7 @@ static int ps_read (void)
        ps_submit_state ("paging",   paging);
        ps_submit_state ("blocked",  blocked);
 
-       for (ps = list_head_g; ps != NULL; ps = ps->next)
+       for (procstat_t *ps = list_head_g; ps != NULL; ps = ps->next)
                ps_submit_proc_list (ps);
 /* #endif HAVE_PROCINFO_H */
 
@@ -2354,7 +2304,6 @@ static int ps_read (void)
        DIR *proc;
 
        int status;
-       procstat_t *ps_ptr;
        char state;
 
        char cmdline[PRARGSZ];
@@ -2398,14 +2347,10 @@ static int ps_read (void)
                pse.vmem_code  = ps.vmem_code;
                pse.stack_size = ps.stack_size;
 
-               pse.vmem_minflt = 0;
                pse.vmem_minflt_counter = ps.vmem_minflt_counter;
-               pse.vmem_majflt = 0;
                pse.vmem_majflt_counter = ps.vmem_majflt_counter;
 
-               pse.cpu_user = 0;
                pse.cpu_user_counter = ps.cpu_user_counter;
-               pse.cpu_system = 0;
                pse.cpu_system_counter = ps.cpu_system_counter;
 
                pse.io_rchar = ps.io_rchar;
@@ -2444,7 +2389,7 @@ static int ps_read (void)
        ps_submit_state ("system",   system);
        ps_submit_state ("orphan",   orphan);
 
-       for (ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
+       for (procstat_t *ps_ptr = list_head_g; ps_ptr != NULL; ps_ptr = ps_ptr->next)
                ps_submit_proc_list (ps_ptr);
 
        read_fork_rate();