[tracker/cpuaffinity] tracker-store: Experimental CPU affinity setting

[Jürg Billeter <juergbi src gnome org>]

commit b45ac9edc1dab9c29c92530b78d0e0d7efd3b54c
Author: Jürg Billeter <j bitron ch>
Date:   Thu Jun 24 14:34:45 2010 +0200

    tracker-store: Experimental CPU affinity setting

 src/tracker-store/tracker-store.c |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-store/tracker-store.c b/src/tracker-store/tracker-store.c
index 8b1c24c..cc6aa04 100644
--- a/src/tracker-store/tracker-store.c
+++ b/src/tracker-store/tracker-store.c
@@ -21,6 +21,10 @@
 
 #include "config.h"
 
+#define _GNU_SOURCE
+#include <sched.h>
+#include <pthread.h>
+
 #include <unistd.h>
 #include <sys/types.h>
 
@@ -104,6 +108,8 @@ typedef struct {
 
 static GStaticPrivate private_key = G_STATIC_PRIVATE_INIT;
 
+static int cpu;
+
 static void start_handler (TrackerStorePrivate *private);
 
 static void
@@ -445,6 +451,15 @@ pool_dispatch_cb (gpointer data,
 	TrackerStorePrivate *private;
 	TrackerStoreTask *task;
 
+	if (GPOINTER_TO_INT (data) == 1) {
+		cpu_set_t cpuset;
+		CPU_ZERO (&cpuset);
+		CPU_SET (cpu, &cpuset);
+		pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
+
+		return;
+	}
+
 	private = user_data;
 	task = data;
 
@@ -629,6 +644,13 @@ tracker_store_init (void)
 	g_thread_pool_set_max_idle_time (15 * 1000);
 	g_thread_pool_set_max_unused_threads (2);
 
+	cpu_set_t cpuset;
+	cpu = sched_getcpu ();
+	CPU_ZERO (&cpuset);
+	CPU_SET (cpu, &cpuset);
+	pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
+	g_thread_pool_push (private->main_pool, GINT_TO_POINTER (1), NULL);
+
 	g_static_private_set (&private_key,
 	                      private,
 	                      private_free);