steadystate: add free helper

[fio.git] / helper_thread.c

diff --git a/helper_thread.c b/helper_thread.c
index 1befabfca7a04024bba69ee6859a73086e85cdb5..64e5a3c9d79277fe160065b9cab8f42a27ab78c6 100644 (file)
--- a/helper_thread.c
+++ b/helper_thread.c
@@ -1,6 +1,7 @@
 #include "fio.h"
 #include "smalloc.h"
 #include "helper_thread.h"
+#include "steadystate.h"
 
 static struct helper_data {
        volatile int exit;
@@ -69,53 +70,51 @@ void helper_thread_exit(void)
 static void *helper_thread_main(void *data)
 {
        struct helper_data *hd = data;
-       unsigned int msec_to_next_event, next_log;
-       struct timeval tv, last_du;
+       unsigned int msec_to_next_event, next_log, next_ss = STEADYSTATE_MSEC;
+       struct timeval tv;
+       struct timespec ts, last_du, last_ss;
        int ret = 0;
 
        sk_out_assign(hd->sk_out);
 
        gettimeofday(&tv, NULL);
-       memcpy(&last_du, &tv, sizeof(tv));
+       ts.tv_sec = tv.tv_sec;
+       ts.tv_nsec = tv.tv_usec * 1000;
+       memcpy(&last_du, &ts, sizeof(ts));
+       memcpy(&last_ss, &ts, sizeof(ts));
 
        fio_mutex_up(hd->startup_mutex);
 
        msec_to_next_event = DISK_UTIL_MSEC;
        while (!ret && !hd->exit) {
-               struct timespec ts;
-               struct timeval now;
-               uint64_t since_du;
+               uint64_t since_du, since_ss = 0;
 
-               timeval_add_msec(&tv, msec_to_next_event);
-               ts.tv_sec = tv.tv_sec;
-               ts.tv_nsec = tv.tv_usec * 1000;
+               timespec_add_msec(&ts, msec_to_next_event);
 
                pthread_mutex_lock(&hd->lock);
                pthread_cond_timedwait(&hd->cond, &hd->lock, &ts);
 
-               gettimeofday(&now, NULL);
+               gettimeofday(&tv, NULL);
+               ts.tv_sec = tv.tv_sec;
+               ts.tv_nsec = tv.tv_usec * 1000;
 
                if (hd->reset) {
-                       memcpy(&tv, &now, sizeof(tv));
-                       memcpy(&last_du, &now, sizeof(last_du));
+                       memcpy(&last_du, &ts, sizeof(ts));
+                       memcpy(&last_ss, &ts, sizeof(ts));
                        hd->reset = 0;
                }
 
                pthread_mutex_unlock(&hd->lock);
 
-               since_du = mtime_since(&last_du, &now);
+               since_du = mtime_since(&last_du, &ts);
                if (since_du >= DISK_UTIL_MSEC || DISK_UTIL_MSEC - since_du < 10) {
                        ret = update_io_ticks();
-                       timeval_add_msec(&last_du, DISK_UTIL_MSEC);
+                       timespec_add_msec(&last_du, DISK_UTIL_MSEC);
                        msec_to_next_event = DISK_UTIL_MSEC;
                        if (since_du >= DISK_UTIL_MSEC)
                                msec_to_next_event -= (since_du - DISK_UTIL_MSEC);
-               } else {
-                       if (since_du >= DISK_UTIL_MSEC)
-                               msec_to_next_event = DISK_UTIL_MSEC - (DISK_UTIL_MSEC - since_du);
-                       else
-                               msec_to_next_event = DISK_UTIL_MSEC;
-               }
+               } else
+                       msec_to_next_event = DISK_UTIL_MSEC - since_du;
 
                if (hd->do_stat) {
                        hd->do_stat = 0;
@@ -126,7 +125,21 @@ static void *helper_thread_main(void *data)
                if (!next_log)
                        next_log = DISK_UTIL_MSEC;
 
-               msec_to_next_event = min(next_log, msec_to_next_event);
+               if (steadystate_enabled) {
+                       since_ss = mtime_since(&last_ss, &ts);
+                       if (since_ss >= STEADYSTATE_MSEC || STEADYSTATE_MSEC - since_ss < 10) {
+                               steadystate_check();
+                               timespec_add_msec(&last_ss, since_ss);
+                               if (since_ss > STEADYSTATE_MSEC)
+                                       next_ss = STEADYSTATE_MSEC - (since_ss - STEADYSTATE_MSEC);
+                               else
+                                       next_ss = STEADYSTATE_MSEC;
+                       } else
+                               next_ss = STEADYSTATE_MSEC - since_ss;
+                }
+
+               msec_to_next_event = min(min(next_log, msec_to_next_event), next_ss);
+               dprint(FD_HELPERTHREAD, "since_ss: %llu, next_ss: %u, next_log: %u, msec_to_next_event: %u\n", (unsigned long long)since_ss, next_ss, next_log, msec_to_next_event);
 
                if (!is_backend)
                        print_thread_status();
@@ -146,10 +159,14 @@ int helper_thread_create(struct fio_mutex *startup_mutex, struct sk_out *sk_out)
        hd = smalloc(sizeof(*hd));
 
        setup_disk_util();
+       steadystate_setup();
 
        hd->sk_out = sk_out;
-       pthread_cond_init(&hd->cond, NULL);
-       pthread_mutex_init(&hd->lock, NULL);
+
+       ret = mutex_cond_init_pshared(&hd->lock, &hd->cond);
+       if (ret)
+               return 1;
+
        hd->startup_mutex = startup_mutex;
 
        ret = pthread_create(&hd->thread, NULL, helper_thread_main, hd);