traceset position save fix
[lttv.git] / ltt / branches / poly / lttv / lttv / batchtest.c
index 2fc7fd99a4e38f7fcd381698d60cce2641216fd0..8d4be06ea2b0c07afee533ee265af86bc99a605c 100644 (file)
    all the events in the main tracefile while testing the speed and
    functionality of the state and stats computations. */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
 
+#include <string.h>
 #include <lttv/lttv.h>
 #include <lttv/attribute.h>
 #include <lttv/hook.h>
@@ -32,6 +36,9 @@
 #include <ltt/trace.h>
 #include <ltt/event.h>
 #include <ltt/type.h>
+#include <ltt/facility.h>
+
+#define __UNUSED__ __attribute__((__unused__))
 
 static LttvTraceset *traceset;
 
@@ -42,8 +49,9 @@ static LttvHooks
   *after_trace,
   *before_tracefile,
   *after_tracefile,
-  *before_event,
-  *after_event,
+  //*before_event,
+  //*after_event,
+  *event_hook,
   *main_hooks;
 
 static char *a_trace;
@@ -55,6 +63,7 @@ static char *a_save_sample;
 static int
   a_sample_interval,
   a_sample_number,
+  a_seek_number,
   a_save_interval;
 
 static gboolean
@@ -67,8 +76,12 @@ static gboolean
   a_test5,
   a_test6,
   a_test7,
+  a_test8,
   a_test_all;
 
+static GQuark QUARK_BLOCK_START,
+              QUARK_BLOCK_END;
+
 LttEventPosition *a_event_position;
 
 typedef struct _save_state {
@@ -82,13 +95,16 @@ typedef struct _save_state {
 } SaveState;
 
 
-static void lttv_trace_option(void *hook_data)
+static void lttv_trace_option(void __UNUSED__ *hook_data)
 { 
   LttTrace *trace;
 
   trace = ltt_trace_open(a_trace);
-  if(trace == NULL) g_critical("cannot open trace %s", a_trace);
-  lttv_traceset_add(traceset, lttv_trace_new(trace));
+  if(trace == NULL) {
+    g_critical("cannot open trace %s", a_trace);
+  } else {
+    lttv_traceset_add(traceset, lttv_trace_new(trace));
+  }
 }
 
 static double get_time() 
@@ -103,11 +119,17 @@ static double run_one_test(LttvTracesetState *ts, LttTime start, LttTime end)
 {
   double t0, t1;
 
-  int i;
+  unsigned int i;
 
-  lttv_traceset_context_add_hooks(&ts->parent,
-  before_traceset, after_traceset, NULL, before_trace, after_trace,
-  NULL, before_tracefile, after_tracefile, NULL, before_event, after_event);
+  //lttv_traceset_context_add_hooks(&ts->parent,
+  //before_traceset, after_traceset, NULL, before_trace, after_trace,
+  //NULL, before_tracefile, after_tracefile, NULL, before_event, after_event);
+  lttv_process_traceset_begin(&ts->parent,
+                              before_traceset,
+                              before_trace,
+                              before_tracefile,
+                              event_hook,
+                              NULL);
 
   for(i = 0 ; i < lttv_traceset_number(traceset) ; i++) {
     ((LttvTraceState *)(ts->parent.traces[i]))->save_interval =a_save_interval;
@@ -115,58 +137,99 @@ static double run_one_test(LttvTracesetState *ts, LttTime start, LttTime end)
 
   t0 = get_time();
   lttv_state_traceset_seek_time_closest(ts, start);
-  lttv_process_traceset(&ts->parent, end, G_MAXULONG);
+  //lttv_process_traceset(&ts->parent, end, G_MAXULONG);
+  lttv_process_traceset_middle(&ts->parent,
+                               end,
+                               G_MAXULONG,
+                               NULL);
   t1 = get_time();
 
-  lttv_traceset_context_remove_hooks(&ts->parent,
-  before_traceset, after_traceset, NULL, before_trace, after_trace,
-  NULL, before_tracefile, after_tracefile, NULL, before_event, after_event);
+  //lttv_traceset_context_remove_hooks(&ts->parent,
+  //before_traceset, after_traceset, NULL, before_trace, after_trace,
+  //NULL, before_tracefile, after_tracefile, NULL, before_event, after_event);
+  lttv_process_traceset_end(&ts->parent,
+                            after_traceset,
+                            after_trace,
+                            after_tracefile,
+                            event_hook,
+                            NULL);
 
   return t1 - t0;
 }
 
 
-gboolean trace_event(void *hook_data, void *call_data)
+gboolean trace_event(void __UNUSED__ *hook_data, void *call_data)
 {
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
 
-  guint nb_block, nb_event;
+  guint nb_block, offset;
 
-  LttTracefile *tf;
+  guint64 tsc;
 
-  ltt_event_position(tfs->parent.e, a_event_position);
-  ltt_event_position_get(a_event_position, &nb_block, &nb_event, &tf);
-  fprintf(stderr,"Event %s %lu.%09lu [%lu %lu]\n",
-      ltt_eventtype_name(ltt_event_eventtype(tfs->parent.e)),
+  LttTracefile *tf;
+  LttEvent *e = ltt_tracefile_get_event(tfs->parent.tf);
+  ltt_event_position(e, a_event_position);
+  ltt_event_position_get(a_event_position, &tf, &nb_block, &offset, &tsc);
+  fprintf(stderr,"Event %s %lu.%09lu [%u 0x%x tsc %llu]\n",
+      g_quark_to_string(ltt_eventtype_name(ltt_event_eventtype(e))),
       tfs->parent.timestamp.tv_sec, tfs->parent.timestamp.tv_nsec,
-      nb_block, nb_event);
+      nb_block, offset, tsc);
   return FALSE;
 }
 
+static LttTime count_previous_time = { 0, 0 };
 
-gboolean count_event(void *hook_data, void *call_data)
+gboolean count_event(void *hook_data, void __UNUSED__ *call_data)
 {
+  LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+  LttTracefile *tracefile = tfs->parent.tf;
+  guint nb_block, offset;
+  LttTracefile *tf_pos;
+  guint64 tsc;
+  LttEvent * event = ltt_tracefile_get_event(tracefile);
+  LttTime time;
   guint *pcount = (guint *)hook_data;
 
   (*pcount)++;
+  
+  time = ltt_event_time(event);
+  ltt_event_position(event, a_event_position);
+  ltt_event_position_get(a_event_position, &tf_pos, &nb_block, &offset, &tsc);
+  
+  if(ltt_time_compare(time, count_previous_time) < 0) {
+    g_warning("Time decreasing trace %s tracefile %s cpu %u position %u/0x%x",
+  g_quark_to_string(ltt_trace_name(ltt_tracefile_get_trace(tracefile))),
+  g_quark_to_string(ltt_tracefile_name(tracefile)), 
+  ltt_tracefile_num(tracefile), nb_block, offset);
+    g_warning("last time %lu.%lu vs current %lu.%lu",
+  count_previous_time.tv_sec, count_previous_time.tv_nsec,
+  time.tv_sec, time.tv_nsec);
+  } 
+  count_previous_time = time;
+
+
+
   return FALSE;
 }
 
 
 gboolean save_state_copy_event(void *hook_data, void *call_data)
 {
-  SaveState *save_state = (SaveState *)hook_data;
+  SaveState __UNUSED__ *save_state = (SaveState *)hook_data;
 
   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
 
   LttvTraceState *ts = (LttvTraceState *)tfs->parent.t_context;
 
+  LttEvent *e = ltt_tracefile_get_event(tfs->parent.tf);
+
   GString *filename;
 
   FILE *fp;
 
-  if(ts->nb_event == 0 && strcmp(ltt_eventtype_name(
-      ltt_event_eventtype(tfs->parent.e)), "block_start") == 0) {
+  if(ts->nb_event == 0 && 
+      ltt_eventtype_name(ltt_event_eventtype(e)) 
+                            == QUARK_BLOCK_START) {
     if(a_save_sample != NULL) {
       filename = g_string_new("");
       g_string_printf(filename, "%s.copy.%lu.%09lu.xml", a_save_sample, 
@@ -215,37 +278,134 @@ gboolean save_state_event(void *hook_data, void *call_data)
 }
 
 
-static gboolean process_traceset(void *hook_data, void *call_data)
+static void sanitize_name(gchar *name)
 {
-  LttvTracesetStats *tscs;
+  while(*name != '\0') {
+    if(*name == '/') *name = '_';
+    name++;
+  }
+  
+}
 
-  LttvTracesetState *ts;
-
-  LttvTracesetContext *tc;
 
+static void compute_tracefile(LttTracefile *tracefile, void *hook_data)
+{
   GString *filename;
-
+  guint nb_equal, nb_block, offset;
+  guint64 tsc;
   FILE *fp;
+  LttTime time, previous_time;
+  LttEvent *event = ltt_tracefile_get_event(tracefile);
+  LttFacility *facility;
+  LttEventType *event_type;
+  int err;
+  gchar mod_name[PATH_MAX];
+
+  /* start_count is always initialized in this function _if_ there is always
+   * a block_start before a block_end.
+   */
+  long long unsigned cycle_count, start_count=0, delta_cycle;
+
+
+  filename = g_string_new("");
+  strcpy(mod_name, g_quark_to_string(ltt_tracefile_name(tracefile)));
+  
+  sanitize_name(mod_name);
+  
+  g_warning("test %s test", g_quark_to_string(ltt_tracefile_name(tracefile)));
+  g_string_printf(filename, "%s.%s.%u.trace", a_dump_tracefiles,
+      mod_name, ltt_tracefile_num(tracefile));
+  fp = fopen(filename->str, "w");
+  if(fp == NULL) g_error("Cannot open %s", filename->str);
+  g_string_free(filename, TRUE);
+  err = ltt_tracefile_seek_time(tracefile, ltt_time_zero);
+  if(err) goto close;
+  
+  previous_time = ltt_time_zero;
+  nb_equal = 0;
+
+  do {
+    LttTracefile *tf_pos;
+    facility = ltt_event_facility(event);
+    event_type = ltt_event_eventtype(event);
+    time = ltt_event_time(event);
+    ltt_event_position(event, a_event_position);
+    ltt_event_position_get(a_event_position, &tf_pos, &nb_block, &offset, &tsc);
+    //fprintf(fp,"%s.%s: %llu %lu.%09lu position %u/%u\n", 
+    fprintf(fp, "%s.%s: %llu %lu.%09lu position %u/%u, tracefile %s\n", 
+        g_quark_to_string(ltt_facility_name(facility)),
+        g_quark_to_string(ltt_eventtype_name(event_type)),
+        tsc, (unsigned long)time.tv_sec, 
+        (unsigned long)time.tv_nsec, 
+        nb_block, offset,
+        g_quark_to_string(ltt_tracefile_name(tracefile)));
+
+    if(ltt_time_compare(time, previous_time) < 0) {
+      g_warning("Time decreasing trace %s tracefile %s cpu %u position %u/0x%x",
+    g_quark_to_string(ltt_trace_name(ltt_tracefile_get_trace(tracefile))),
+    g_quark_to_string(ltt_tracefile_name(tracefile)), 
+    ltt_tracefile_num(tracefile), nb_block, offset);
+      g_warning("last time %lu.%lu vs current %lu.%lu",
+    previous_time.tv_sec, previous_time.tv_nsec,
+    time.tv_sec, time.tv_nsec);
+    }
 
-  double t;
-
-  guint i, j, count, nb_control, nb_tracefile, nb_block, nb_event, nb_equal;
+#if 0 //FIXME
+    if(ltt_eventtype_name(event_type) == QUARK_BLOCK_START) {
+      start_count = cycle_count;
+      start_time = time;
+    }
+    else if(ltt_eventtype_name(event_type) == QUARK_BLOCK_END) {
+      delta_cycle = cycle_count - start_count;
+      end_nsec_sec = (long long unsigned)time.tv_sec * (long long unsigned)1000000000;
+      end_nsec_nsec = time.tv_nsec;
+      end_nsec = end_nsec_sec + end_nsec_nsec;
+      start_nsec = (long long unsigned)start_time.tv_sec * (long long unsigned)1000000000 + (long long unsigned)start_time.tv_nsec;
+      delta_nsec = end_nsec - start_nsec;
+      cycle_per_nsec = (double)delta_cycle / (double)delta_nsec;
+      nsec_per_cycle = (double)delta_nsec / (double)delta_cycle;
+      added_nsec = (double)delta_cycle * nsec_per_cycle;
+      interpolated_nsec = start_nsec + added_nsec;
+      added_nsec2 = (double)delta_cycle / cycle_per_nsec;
+      interpolated_nsec2 = start_nsec + added_nsec2;
+
+      fprintf(fp,"Time: start_count %llu, end_count %llu, delta_cycle %llu, start_nsec %llu, end_nsec_sec %llu, end_nsec_nsec %llu, end_nsec %llu, delta_nsec %llu, cycle_per_nsec %.25f, nsec_per_cycle %.25f, added_nsec %llu, added_nsec2 %llu, interpolated_nsec %llu, interpolated_nsec2 %llu\n", start_count, cycle_count, delta_cycle, start_nsec, end_nsec_sec, end_nsec_nsec, end_nsec, delta_nsec, cycle_per_nsec, nsec_per_cycle, added_nsec, added_nsec2, interpolated_nsec, interpolated_nsec2);
+    }
+    else {
+#endif //0
+      if(ltt_time_compare(time, previous_time) == 0) nb_equal++;
+      else if(nb_equal > 0) {
+        g_warning("Consecutive %d events with time %lu.%09lu",
+                   nb_equal + 1, previous_time.tv_sec, previous_time.tv_nsec);
+        nb_equal = 0;
+      }
+      previous_time = time;
+    //}
+  } while((!ltt_tracefile_read(tracefile)));
 
-  LttTrace *trace;
+close:
+  fclose(fp);
+}
 
-  LttTracefile *tracefile, *tf;
+static gboolean process_traceset(void __UNUSED__ *hook_data, 
+                                 void __UNUSED__ *call_data)
+{
+  GString *filename;
+  LttvTracesetStats *tscs;
 
-  LttEvent *event;
+  LttvTracesetState *ts;
 
-  LttFacility *facility;
+  LttvTracesetContext *tc;
 
-  LttType *type;
+  FILE *fp;
 
-  LttEventType *event_type;
+  double t;
 
-  LttTime time, previous_time;
+  //guint count, nb_control, nb_tracefile, nb_block, nb_event;
+  //guint i, j, count, nb_control, nb_tracefile, nb_block, nb_event, nb_equal;
+  guint i, j, count;
 
-  long long unsigned cycle_count, start_count, delta_cycle;
+  LttTrace *trace;
 
   long long unsigned start_nsec, end_nsec, delta_nsec, added_nsec, added_nsec2;
 
@@ -255,83 +415,26 @@ static gboolean process_traceset(void *hook_data, void *call_data)
 
   LttTime start_time;
 
-  LttTime zero_time = ltt_time_zero;
-
   LttTime max_time = { G_MAXULONG, G_MAXULONG };
 
   a_event_position = ltt_event_position_new();
 
+  GData **tracefiles_groups;
+
+  struct compute_tracefile_group_args args;
+
+  args.func = compute_tracefile;
+  args.func_args = NULL;
+  
   if(a_dump_tracefiles != NULL) {
     for(i = 0 ; i < lttv_traceset_number(traceset) ; i++) {
       trace = lttv_trace(lttv_traceset_get(traceset, i));
-      nb_control = ltt_trace_control_tracefile_number(trace);
-      nb_tracefile = nb_control + ltt_trace_per_cpu_tracefile_number(trace);
-      for(j = 0 ; j < nb_tracefile ; j++) {
-        if(j < nb_control) {
-          tracefile = ltt_trace_control_tracefile_get(trace,j);
-        }
-        else {
-          tracefile = ltt_trace_per_cpu_tracefile_get(trace,j - nb_control);
-        }
+      tracefiles_groups = ltt_trace_get_tracefiles_groups(trace);
 
-        filename = g_string_new("");
-        g_string_printf(filename, "%s.%u.%u.trace", a_dump_tracefiles, i, j);
-        fp = fopen(filename->str, "w");
-        if(fp == NULL) g_error("Cannot open %s", filename->str);
-        g_string_free(filename, TRUE);
-        ltt_tracefile_seek_time(tracefile, zero_time);
-        previous_time = zero_time;
-        nb_equal = 0;
-        while((event = ltt_tracefile_read(tracefile)) != NULL) {
-          facility = ltt_event_facility(event);
-          event_type = ltt_event_eventtype(event);
-          time = ltt_event_time(event);
-          cycle_count = ltt_event_cycle_count(event);
-          ltt_event_position(event, a_event_position);
-          ltt_event_position_get(a_event_position, &nb_block, &nb_event, &tf);
-          fprintf(fp,"%s.%s: %llu %lu.%09lu position %u/%u\n", 
-              ltt_facility_name(facility), ltt_eventtype_name(event_type), 
-             cycle_count, (unsigned long)time.tv_sec, 
-              (unsigned long)time.tv_nsec, 
-              nb_block, nb_event);
-
-          if(ltt_time_compare(time, previous_time) < 0) {
-            g_warning("Time decreasing trace %d tracefile %d position %u/%u",
-                     i, j, nb_block, nb_event);
-          }
-
-          if(strcmp(ltt_eventtype_name(event_type),"block_start") == 0) {
-            start_count = cycle_count;
-            start_time = time;
-          }
-          else if(strcmp(ltt_eventtype_name(event_type),"block_end") == 0) {
-            delta_cycle = cycle_count - start_count;
-            end_nsec_sec = (long long unsigned)time.tv_sec * (long long unsigned)1000000000;
-            end_nsec_nsec = time.tv_nsec;
-            end_nsec = end_nsec_sec + end_nsec_nsec;
-            start_nsec = (long long unsigned)start_time.tv_sec * (long long unsigned)1000000000 + (long long unsigned)start_time.tv_nsec;
-            delta_nsec = end_nsec - start_nsec;
-            cycle_per_nsec = (double)delta_cycle / (double)delta_nsec;
-            nsec_per_cycle = (double)delta_nsec / (double)delta_cycle;
-            added_nsec = (double)delta_cycle * nsec_per_cycle;
-            interpolated_nsec = start_nsec + added_nsec;
-            added_nsec2 = (double)delta_cycle / cycle_per_nsec;
-            interpolated_nsec2 = start_nsec + added_nsec2;
-
-            fprintf(fp,"Time: start_count %llu, end_count %llu, delta_cycle %llu, start_nsec %llu, end_nsec_sec %llu, end_nsec_nsec %llu, end_nsec %llu, delta_nsec %llu, cycle_per_nsec %.25f, nsec_per_cycle %.25f, added_nsec %llu, added_nsec2 %llu, interpolated_nsec %llu, interpolated_nsec2 %llu\n", start_count, cycle_count, delta_cycle, start_nsec, end_nsec_sec, end_nsec_nsec, end_nsec, delta_nsec, cycle_per_nsec, nsec_per_cycle, added_nsec, added_nsec2, interpolated_nsec, interpolated_nsec2);
-          }
-          else {
-            if(ltt_time_compare(time, previous_time) == 0) nb_equal++;
-           else if(nb_equal > 0) {
-              g_warning("Consecutive %d events with time %lu.%09lu",
-                 nb_equal + 1, previous_time.tv_sec, previous_time.tv_nsec);
-              nb_equal = 0;
-           }
-            previous_time = time;
-          }
-        }
-        fclose(fp);
-      }
+      g_datalist_foreach(tracefiles_groups, 
+                            (GDataForeachFunc)compute_tracefile_group,
+                            &args);
+      
     }
   }
 
@@ -347,10 +450,10 @@ static gboolean process_traceset(void *hook_data, void *call_data)
 
   if(a_test1 || a_test_all) {
     count = 0;
-    lttv_hooks_add(after_event, count_event, &count);
-    t = run_one_test(ts, zero_time, max_time);
-    lttv_hooks_remove_data(after_event, count_event, &count);
-    g_warning(
+    lttv_hooks_add(event_hook, count_event, &count, LTTV_PRIO_DEFAULT);
+    t = run_one_test(ts, ltt_time_zero, max_time);
+    lttv_hooks_remove_data(event_hook, count_event, &count);
+    g_message(
         "Processing trace while counting events (%u events in %g seconds)",
        count, t);
   }
@@ -359,9 +462,9 @@ static gboolean process_traceset(void *hook_data, void *call_data)
 
   if(a_test2 || a_test_all) {
     lttv_state_add_event_hooks(ts);
-    t = run_one_test(ts, zero_time, max_time);
+    t = run_one_test(ts, ltt_time_zero, max_time);
     lttv_state_remove_event_hooks(ts);
-    g_warning("Processing trace while updating state (%g seconds)", t);
+    g_message("Processing trace while updating state (%g seconds)", t);
   }
 
   /* Run through all events computing the state and writing it out 
@@ -381,10 +484,11 @@ static gboolean process_traceset(void *hook_data, void *call_data)
       save_state.position = 0;
       save_state.version = i;
       lttv_state_add_event_hooks(ts);
-      lttv_hooks_add(after_event, save_state_event, &save_state);
-      t = run_one_test(ts, zero_time, max_time);
+      lttv_hooks_add(event_hook, save_state_event, &save_state,
+                        LTTV_PRIO_DEFAULT);
+      t = run_one_test(ts, ltt_time_zero, max_time);
       lttv_state_remove_event_hooks(ts);
-      lttv_hooks_remove_data(after_event, save_state_event, &save_state);
+      lttv_hooks_remove_data(event_hook, save_state_event, &save_state);
       g_warning("Processing while updating/writing state (%g seconds)", t);
     }
   }
@@ -398,9 +502,9 @@ static gboolean process_traceset(void *hook_data, void *call_data)
     }
 
     lttv_stats_add_event_hooks(tscs);
-    t = run_one_test(ts, zero_time, max_time);
+    t = run_one_test(ts, ltt_time_zero, max_time);
     lttv_stats_remove_event_hooks(tscs);
-    g_warning("Processing trace while counting stats (%g seconds)", t);
+    g_message("Processing trace while counting stats (%g seconds)", t);
 
     if(lttv_profile_memory) {
       g_message("Memory summary after computing stats");
@@ -433,10 +537,10 @@ static gboolean process_traceset(void *hook_data, void *call_data)
 
     lttv_state_add_event_hooks(ts);
     lttv_stats_add_event_hooks(tscs);
-    t = run_one_test(ts, zero_time, max_time);
+    t = run_one_test(ts, ltt_time_zero, max_time);
     lttv_state_remove_event_hooks(ts);
     lttv_stats_remove_event_hooks(tscs);
-    g_warning(
+    g_message(
         "Processing trace while counting state and stats (%g seconds)", t);
 
     if(lttv_profile_memory) {
@@ -455,7 +559,8 @@ static gboolean process_traceset(void *hook_data, void *call_data)
 
   /* Run through all events computing and saving the state. */
 
-  if(a_trace_event) lttv_hooks_add(after_event, trace_event, NULL);
+  if(a_trace_event) lttv_hooks_add(event_hook, trace_event, NULL,
+                                      LTTV_PRIO_DEFAULT);
 
   if(a_test6 || a_test_all) {
     if(lttv_profile_memory) {
@@ -466,14 +571,15 @@ static gboolean process_traceset(void *hook_data, void *call_data)
     lttv_state_add_event_hooks(ts);
     lttv_state_save_add_event_hooks(ts);
     if(a_save_state_copy)
-        lttv_hooks_add(after_event, save_state_copy_event, &save_state);
-    t = run_one_test(ts, zero_time, max_time);
+        lttv_hooks_add(event_hook, save_state_copy_event, &save_state,
+                          LTTV_PRIO_DEFAULT);
+    t = run_one_test(ts, ltt_time_zero, max_time);
     lttv_state_remove_event_hooks(ts);
     lttv_state_save_remove_event_hooks(ts);
     if(a_save_state_copy)
-        lttv_hooks_remove_data(after_event,save_state_copy_event, &save_state);
+        lttv_hooks_remove_data(event_hook,save_state_copy_event, &save_state);
 
-    g_warning("Processing trace while updating/saving state (%g seconds)", t);
+    g_message("Processing trace while updating/saving state (%g seconds)", t);
 
     if(lttv_profile_memory) {
       g_message("Memory summary after computing/saving state");
@@ -484,15 +590,16 @@ static gboolean process_traceset(void *hook_data, void *call_data)
   /* Seek a few times to each saved position */
 
   if((a_test7 && a_test3) || a_test_all) {
-    int i, j;
-
-    for(i = 0 ; i < 2 ; i++) {
-      for(j = save_state.position - 1 ; j >= 0 ; j--) {
+    g_assert(a_seek_number >= 0);
+    for(i = 0 ; i < (guint)a_seek_number ; i++) {
+      gint reverse_j; /* just to make sure j is unsigned */
+      for(reverse_j = save_state.position - 1 ; reverse_j >= 0 ; reverse_j--) {
+        j = (guint)reverse_j;
         lttv_state_add_event_hooks(ts);
         t = run_one_test(ts, save_state.write_time[j], 
             save_state.write_time[j]);
         lttv_state_remove_event_hooks(ts);
-        g_warning("Seeking to %lu.%lu (%g seconds)", 
+        g_message("Seeking to %lu.%lu (%g seconds)", 
             save_state.write_time[j].tv_sec, save_state.write_time[j].tv_nsec,
             t);
 
@@ -512,7 +619,37 @@ static gboolean process_traceset(void *hook_data, void *call_data)
     }
   }
 
-  if(a_trace_event) lttv_hooks_remove_data(after_event, trace_event, NULL);
+  /* Seek at specified interval, using states computed in 6, making
+   * sure that there is no more than the number of events between
+   * state save interval to read before getting there.
+   */
+
+  if((a_test8 && a_test6) || a_test_all) {
+    g_message("Running test 8 : check save interval");
+    LttTime time = tc->time_span.start_time;
+    LttTime interval;
+    interval.tv_sec = 0;
+    interval.tv_nsec = 175674987;
+    guint count;
+
+    while(ltt_time_compare(time, tc->time_span.end_time) < 0) {
+      //g_message("Seeking at time %u.%u", time.tv_sec, time.tv_nsec);
+      lttv_process_traceset_seek_time(&ts->parent, ltt_time_zero);
+      lttv_state_traceset_seek_time_closest(ts, time);
+      /* We add no hook to the traceset, not necessary */
+      count = lttv_process_traceset_middle(&ts->parent,
+          time, G_MAXUINT, NULL);
+      g_info("Number of events to jump over : %u", count);
+      
+      if(count > LTTV_STATE_SAVE_INTERVAL)
+        g_warning("Oops! Save interval is %u and it took %u events to seek to a time %lu.%lu supposed to be closer from the last saved state.",
+            LTTV_STATE_SAVE_INTERVAL, count, time.tv_sec, time.tv_nsec);
+      time = ltt_time_add(time, interval);
+    }
+
+  }
+
+  if(a_trace_event) lttv_hooks_remove_data(event_hook, trace_event, NULL);
 
   g_free(save_state.write_time);
   g_free(a_event_position);
@@ -525,6 +662,7 @@ static gboolean process_traceset(void *hook_data, void *call_data)
   }
 
   g_info("BatchTest end process traceset");
+  return 0;
 }
 
 
@@ -536,6 +674,11 @@ static void init()
 
   g_info("Init batchtest.c");
 
+  /* Init GQuarks */
+  QUARK_BLOCK_START = g_quark_from_string("block_start");
+  QUARK_BLOCK_END = g_quark_from_string("block_end");
+
+  
   lttv_option_add("trace", 't', 
       "add a trace to the trace set to analyse", 
       "pathname of the directory containing the trace", 
@@ -577,6 +720,12 @@ static void init()
       "maximum number", 
       LTTV_OPT_INT, &a_sample_number, NULL, NULL);
 
+  a_seek_number = 200;
+  lttv_option_add("seek-number", 'K', 
+      "Number of seek", 
+      "number", 
+      LTTV_OPT_INT, &a_seek_number, NULL, NULL);
+
   a_test1 = FALSE;
   lttv_option_add("test1", '1', "Test just counting events", "", 
       LTTV_OPT_NONE, &a_test1, NULL, NULL);
@@ -605,6 +754,10 @@ static void init()
   lttv_option_add("test7", '7', "Test seeking to positions written out in 3", 
       "", LTTV_OPT_NONE, &a_test7, NULL, NULL);
 
+  a_test8 = FALSE;
+  lttv_option_add("test8", '8', "Test seeking to positions using saved states computed at 6 : check if number of events fits", 
+      "", LTTV_OPT_NONE, &a_test8, NULL, NULL);
+
   a_test_all = FALSE;
   lttv_option_add("testall", 'a', "Run all tests ", "", 
       LTTV_OPT_NONE, &a_test_all, NULL, NULL);
@@ -617,8 +770,10 @@ static void init()
   after_trace = lttv_hooks_new();
   before_tracefile = lttv_hooks_new();
   after_tracefile = lttv_hooks_new();
-  before_event = lttv_hooks_new();
-  after_event = lttv_hooks_new();
+  //before_event = lttv_hooks_new();
+  //after_event = lttv_hooks_new();
+  event_hook = lttv_hooks_new();
+  
 
   g_assert(lttv_iattribute_find_by_path(attributes, "hooks/traceset/before",
       LTTV_POINTER, &value));
@@ -638,17 +793,19 @@ static void init()
   g_assert(lttv_iattribute_find_by_path(attributes, "hooks/tracefile/after",
       LTTV_POINTER, &value));
   *(value.v_pointer) = after_tracefile;
-  g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event/before",
-      LTTV_POINTER, &value));
-  *(value.v_pointer) = before_event;
-  g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event/after",
+  //g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event/before",
+  //    LTTV_POINTER, &value));
+  //*(value.v_pointer) = before_event;
+  //g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event/after",
+  //    LTTV_POINTER, &value));
+  //*(value.v_pointer) = after_event;
+  g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event",
       LTTV_POINTER, &value));
-  *(value.v_pointer) = after_event;
-
+  *(value.v_pointer) = event_hook;
   g_assert(lttv_iattribute_find_by_path(attributes, "hooks/main/before",
       LTTV_POINTER, &value));
   g_assert((main_hooks = *(value.v_pointer)) != NULL);
-  lttv_hooks_add(main_hooks, process_traceset, NULL);
+  lttv_hooks_add(main_hooks, process_traceset, NULL, LTTV_PRIO_DEFAULT);
 }
 
 
@@ -666,6 +823,7 @@ static void destroy()
   lttv_option_remove("save-state-copy");
   lttv_option_remove("sample-interval");
   lttv_option_remove("sample-number");
+  lttv_option_remove("seek-number");
   lttv_option_remove("save-interval");
   lttv_option_remove("test1");
   lttv_option_remove("test2");
@@ -674,6 +832,7 @@ static void destroy()
   lttv_option_remove("test5");
   lttv_option_remove("test6");
   lttv_option_remove("test7");
+  lttv_option_remove("test8");
   lttv_option_remove("testall");
 
   lttv_hooks_destroy(before_traceset);
@@ -682,13 +841,15 @@ static void destroy()
   lttv_hooks_destroy(after_trace);
   lttv_hooks_destroy(before_tracefile);
   lttv_hooks_destroy(after_tracefile);
-  lttv_hooks_destroy(before_event);
-  lttv_hooks_destroy(after_event);
+  //lttv_hooks_destroy(before_event);
+  //lttv_hooks_destroy(after_event);
+  lttv_hooks_destroy(event_hook);
   lttv_hooks_remove_data(main_hooks, process_traceset, NULL);
 
   nb = lttv_traceset_number(traceset);
   for(i = 0 ; i < nb ; i++) {
     trace = lttv_traceset_get(traceset, i);
+    lttv_traceset_remove(traceset,i);
     ltt_trace_close(lttv_trace(trace));
     lttv_trace_destroy(trace);
   }
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