[tracker-miners/wip/carlosg/perf-squeeze: 1/3] tracker-miner-fs: Preempt graph creation

[Carlos Garnacho <carlosg src gnome org>]

commit 08a5cc5bff7fa77f705873dd2bc8430d19f50753
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jul 5 15:23:23 2020 +0200

    tracker-miner-fs: Preempt graph creation
    
    This is a busy operation that we can squeeze in the initial delay,
    or along the startup phase if there was no delay. In initial indexing
    graph creation is a significant chunk of indexing time, so it's
    something we can prepare in advance.
    
    The graph creation operation is still not that *much* I/O heavy, so
    it's unlikely that it'd influence session startup negatively.

 src/miners/fs/tracker-main.c | 45 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 41 insertions(+), 4 deletions(-)
---
diff --git a/src/miners/fs/tracker-main.c b/src/miners/fs/tracker-main.c
index 278476411..a01c85b55 100644
--- a/src/miners/fs/tracker-main.c
+++ b/src/miners/fs/tracker-main.c
@@ -66,6 +66,9 @@ static gboolean do_crawling = FALSE;
 static gchar *domain_ontology_name = NULL;
 static gboolean dry_run = FALSE;
 
+static gboolean slept = TRUE;
+static gboolean graphs_ready = FALSE;
+
 static GOptionEntry entries[] = {
        { "initial-sleep", 's', 0,
          G_OPTION_ARG_INT, &initial_sleep,
@@ -373,13 +376,23 @@ miner_do_start (TrackerMiner *miner)
        }
 }
 
+static void
+miner_maybe_start (TrackerMiner *miner)
+{
+       if (!slept || !graphs_ready)
+               return;
+
+       miner_do_start (miner);
+}
+
 static gboolean
 miner_start_idle_cb (gpointer data)
 {
        TrackerMiner *miner = data;
 
        miners_timeout_id = 0;
-       miner_do_start (miner);
+       slept = TRUE;
+       miner_maybe_start (miner);
        return G_SOURCE_REMOVE;
 }
 
@@ -392,13 +405,13 @@ miner_start (TrackerMiner  *miner,
 
        if (!do_mtime_checking) {
                g_debug ("Avoiding initial sleep, no mtime check needed");
-               miner_do_start (miner);
+               miner_maybe_start (miner);
                return;
        }
 
        /* If requesting to run as no-daemon, start right away */
        if (no_daemon) {
-               miner_do_start (miner);
+               miner_maybe_start (miner);
                return;
        }
 
@@ -406,10 +419,11 @@ miner_start (TrackerMiner  *miner,
        initial_sleep = tracker_config_get_initial_sleep (config);
 
        if (initial_sleep <= 0) {
-               miner_do_start (miner);
+               miner_maybe_start (miner);
                return;
        }
 
+       slept = FALSE;
        g_message ("Performing initial sleep of %d seconds",
                   initial_sleep);
        miners_timeout_id = g_timeout_add_seconds (initial_sleep,
@@ -482,6 +496,19 @@ dummy_log_handler (const gchar    *domain,
        return;
 }
 
+static void
+graphs_created_cb (GObject      *source,
+                   GAsyncResult *res,
+                   gpointer      user_data)
+{
+       TrackerMiner *miner = user_data;
+
+       tracker_sparql_connection_update_finish (TRACKER_SPARQL_CONNECTION (source),
+                                                res, NULL);
+       graphs_ready = TRUE;
+       miner_maybe_start (miner);
+}
+
 static void
 check_eligible (void)
 {
@@ -981,6 +1008,16 @@ main (gint argc, gchar *argv[])
                          G_CALLBACK (miner_finished_cb),
                          NULL);
 
+       /* Preempt creation of graphs */
+       tracker_sparql_connection_update_async (tracker_miner_get_connection (miner_files),
+                                               "CREATE SILENT GRAPH tracker:FileSystem; "
+                                               "CREATE SILENT GRAPH tracker:Software; "
+                                               "CREATE SILENT GRAPH tracker:Documents; "
+                                               "CREATE SILENT GRAPH tracker:Pictures; "
+                                               "CREATE SILENT GRAPH tracker:Audio; "
+                                               "CREATE SILENT GRAPH tracker:Video ",
+                                               NULL, graphs_created_cb, miner_files);
+
        if (do_crawling)
                miner_start (miner_files, config, do_mtime_checking);