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migration: add speed limit for multifd migration 

Limit the speed of multifd migration through common speed limitation
qemu file.

Signed-off-by: Ivan Ren <ivanren@tencent.com>
Message-Id: <1564464816-21804-3-git-send-email-ivanren@tencent.com>
Reviewed-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Ivan Ren 2019-07-30 13:33:35 +08:00 committed by Dr. David Alan Gilbert
parent 5d7d255863
commit 1b81c974cc
1 changed files with 12 additions and 10 deletions
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22
migration/ram.c
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@ -922,7 +922,7 @@ struct {
* false.
*/
static int multifd_send_pages(void)
static int multifd_send_pages(RAMState *rs)
{
int i;
static int next_channel;
@ -954,6 +954,7 @@ static int multifd_send_pages(void)
multifd_send_state->pages = p->pages;
p->pages = pages;
transferred = ((uint64_t) pages->used) * TARGET_PAGE_SIZE + p->packet_len;
qemu_file_update_transfer(rs->f, transferred);
ram_counters.multifd_bytes += transferred;
ram_counters.transferred += transferred;;
qemu_mutex_unlock(&p->mutex);
@ -962,7 +963,7 @@ static int multifd_send_pages(void)
return 1;
}
static int multifd_queue_page(RAMBlock *block, ram_addr_t offset)
static int multifd_queue_page(RAMState *rs, RAMBlock *block, ram_addr_t offset)
{
MultiFDPages_t *pages = multifd_send_state->pages;
@ -981,12 +982,12 @@ static int multifd_queue_page(RAMBlock *block, ram_addr_t offset)
}
}
if (multifd_send_pages() < 0) {
if (multifd_send_pages(rs) < 0) {
return -1;
}
if (pages->block != block) {
return multifd_queue_page(block, offset);
return multifd_queue_page(rs, block, offset);
}
return 1;
@ -1054,7 +1055,7 @@ void multifd_save_cleanup(void)
multifd_send_state = NULL;
}
static void multifd_send_sync_main(void)
static void multifd_send_sync_main(RAMState *rs)
{
int i;
@ -1062,7 +1063,7 @@ static void multifd_send_sync_main(void)
return;
}
if (multifd_send_state->pages->used) {
if (multifd_send_pages() < 0) {
if (multifd_send_pages(rs) < 0) {
error_report("%s: multifd_send_pages fail", __func__);
return;
}
@ -1083,6 +1084,7 @@ static void multifd_send_sync_main(void)
p->packet_num = multifd_send_state->packet_num++;
p->flags |= MULTIFD_FLAG_SYNC;
p->pending_job++;
qemu_file_update_transfer(rs->f, p->packet_len);
qemu_mutex_unlock(&p->mutex);
qemu_sem_post(&p->sem);
}
@ -2078,7 +2080,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
static int ram_save_multifd_page(RAMState *rs, RAMBlock *block,
ram_addr_t offset)
{
if (multifd_queue_page(block, offset) < 0) {
if (multifd_queue_page(rs, block, offset) < 0) {
return -1;
}
ram_counters.normal++;
@ -3447,7 +3449,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
ram_control_before_iterate(f, RAM_CONTROL_SETUP);
ram_control_after_iterate(f, RAM_CONTROL_SETUP);
multifd_send_sync_main();
multifd_send_sync_main(*rsp);
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
qemu_fflush(f);
@ -3535,7 +3537,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
ram_control_after_iterate(f, RAM_CONTROL_ROUND);
out:
multifd_send_sync_main();
multifd_send_sync_main(rs);
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
qemu_fflush(f);
ram_counters.transferred += 8;
@ -3594,7 +3596,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
rcu_read_unlock();
multifd_send_sync_main();
multifd_send_sync_main(rs);
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
qemu_fflush(f);