Commit 18cc23d7 authored by zhanghailiang's avatar zhanghailiang Committed by Amit Shah
Browse files

COLO: Synchronize PVM's state to SVM periodically 



Do checkpoint periodically, the default interval is 200ms.

Signed-off-by: default avatarzhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: default avatarLi Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarAmit Shah <amit@amitshah.net>
parent 68b53591

migration/colo.c

+12 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
 */



#include "qemu/osdep.h"

#include "qemu/timer.h"

#include "sysemu/sysemu.h"

#include "migration/colo.h"

#include "io/channel-buffer.h"
@@ -226,6 +227,7 @@ static void colo_process_checkpoint(MigrationState *s) 
{

    QIOChannelBuffer *bioc;

    QEMUFile *fb = NULL;

    int64_t current_time, checkpoint_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);

    Error *local_err = NULL;

    int ret;
@@ -254,10 +256,20 @@ 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 <

            s->parameters.x_checkpoint_delay) {

            int64_t delay_ms;



            delay_ms = s->parameters.x_checkpoint_delay -

                       (current_time - checkpoint_time);

            g_usleep(delay_ms * 1000);

        }

        ret = colo_do_checkpoint_transaction(s, bioc, fb);

        if (ret < 0) {

            goto out;

        }

        checkpoint_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);

    }



out: