@@ -10,6 +10,7 @@
* later. See the COPYING file in the top-level directory.
*/
+#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "migration/migration-colo.h"
#include "trace.h"
@@ -24,6 +25,13 @@
*/
#define CHECKPOINT_MIN_PERIOD 100 /* unit: ms */
+/*
+ * force checkpoint timer: unit ms
+ * this is large because COLO checkpoint will mostly depend on
+ * COLO compare module.
+ */
+#define CHECKPOINT_MAX_PEROID 10000
+
enum {
COLO_CHECPOINT_READY = 0x46,
@@ -336,14 +344,7 @@ static void *colo_thread(void *opaque)
proxy_checkpoint_req = colo_proxy_compare();
if (proxy_checkpoint_req < 0) {
goto out;
- } else if (!proxy_checkpoint_req) {
- /*
- * No checkpoint is needed, wait for 1ms and then
- * check if we need checkpoint again
- */
- g_usleep(1000);
- continue;
- } else {
+ } else if (proxy_checkpoint_req) {
int64_t interval;
current_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
@@ -352,8 +353,20 @@ static void *colo_thread(void *opaque)
/* Limit the min time between two checkpoint */
g_usleep((1000*(CHECKPOINT_MIN_PERIOD - interval)));
}
+ goto do_checkpoint;
+ }
+
+ /*
+ * No proxy checkpoint is request, wait for 100ms
+ * and then check if we need checkpoint again.
+ */
+ current_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
+ if (current_time - checkpoint_time < CHECKPOINT_MAX_PEROID) {
+ g_usleep(100000);
+ continue;
}
+do_checkpoint:
/* start a colo checkpoint */
if (colo_do_checkpoint_transaction(s, colo_control)) {
goto out;