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[Qemu-devel] [PATCH COLO-Frame v10 17/38] COLO: synchronize PVM's state
From: |
zhanghailiang |
Subject: |
[Qemu-devel] [PATCH COLO-Frame v10 17/38] COLO: synchronize PVM's state to SVM periodically |
Date: |
Tue, 3 Nov 2015 19:56:35 +0800 |
Do checkpoint periodically, the default interval is 200ms.
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Li Zhijian <address@hidden>
---
migration/colo.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/migration/colo.c b/migration/colo.c
index 0efab21..a6791f4 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -11,12 +11,19 @@
*/
#include <unistd.h>
+#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "migration/colo.h"
#include "trace.h"
#include "qemu/error-report.h"
#include "qemu/sockets.h"
+/*
+ * checkpoint interval: unit ms
+ * Note: Please change this default value to 10000 when we support hybrid mode.
+ */
+#define CHECKPOINT_MAX_PEROID 200
+
/* colo buffer */
#define COLO_BUFFER_BASE_SIZE (4 * 1024 * 1024)
@@ -183,6 +190,7 @@ out:
static void colo_process_checkpoint(MigrationState *s)
{
QEMUSizedBuffer *buffer = NULL;
+ int64_t current_time, checkpoint_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
int fd, ret = 0;
/* Dup the fd of to_dst_file */
@@ -220,11 +228,17 @@ static void colo_process_checkpoint(MigrationState *s)
trace_colo_vm_state_change("stop", "run");
while (s->state == MIGRATION_STATUS_COLO) {
+ current_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
+ if (current_time - checkpoint_time < CHECKPOINT_MAX_PEROID) {
+ g_usleep(100000);
+ continue;
+ }
/* start a colo checkpoint */
ret = colo_do_checkpoint_transaction(s, buffer);
if (ret < 0) {
goto out;
}
+ checkpoint_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
}
out:
--
1.8.3.1
[Qemu-devel] [PATCH COLO-Frame v10 01/38] configure: Add parameter for configure to enable/disable COLO support, zhanghailiang, 2015/11/03
[Qemu-devel] [PATCH COLO-Frame v10 04/38] migration: Add state records for migration incoming, zhanghailiang, 2015/11/03
[Qemu-devel] [PATCH COLO-Frame v10 09/38] COLO: Implement colo checkpoint protocol, zhanghailiang, 2015/11/03