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Restart optimization on stage3 update version

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Signed-off-by: Juan Quintela <quintela@redhat.com>

Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Juan Quintela 2012-08-06 21:42:58 +03:00
parent f36d55af74
commit dd051c7217
1 changed files with 15 additions and 9 deletions
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24
arch_init.c
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@ -275,14 +275,16 @@ static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data, static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
ram_addr_t current_addr, RAMBlock *block, ram_addr_t current_addr, RAMBlock *block,
ram_addr_t offset, int cont) ram_addr_t offset, int cont, bool last_stage)
{ {
int encoded_len = 0, bytes_sent = -1; int encoded_len = 0, bytes_sent = -1;
uint8_t *prev_cached_page; uint8_t *prev_cached_page;
if (!cache_is_cached(XBZRLE.cache, current_addr)) { if (!cache_is_cached(XBZRLE.cache, current_addr)) {
cache_insert(XBZRLE.cache, current_addr, if (!last_stage) {
g_memdup(current_data, TARGET_PAGE_SIZE)); cache_insert(XBZRLE.cache, current_addr,
g_memdup(current_data, TARGET_PAGE_SIZE));
}
acct_info.xbzrle_cache_miss++; acct_info.xbzrle_cache_miss++;
return -1; return -1;
} }
@ -308,7 +310,9 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
} }
/* we need to update the data in the cache, in order to get the same data */ /* we need to update the data in the cache, in order to get the same data */
memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); if (!last_stage) {
memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
}
/* Send XBZRLE based compressed page */ /* Send XBZRLE based compressed page */
save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
@ -333,7 +337,7 @@ static ram_addr_t last_offset;
* n: the amount of bytes written in other case * n: the amount of bytes written in other case
*/ */
static int ram_save_block(QEMUFile *f) static int ram_save_block(QEMUFile *f, bool last_stage)
{ {
RAMBlock *block = last_block; RAMBlock *block = last_block;
ram_addr_t offset = last_offset; ram_addr_t offset = last_offset;
@ -364,8 +368,10 @@ static int ram_save_block(QEMUFile *f)
} else if (migrate_use_xbzrle()) { } else if (migrate_use_xbzrle()) {
current_addr = block->offset + offset; current_addr = block->offset + offset;
bytes_sent = save_xbzrle_page(f, p, current_addr, block, bytes_sent = save_xbzrle_page(f, p, current_addr, block,
offset, cont); offset, cont, last_stage);
p = get_cached_data(XBZRLE.cache, current_addr); if (!last_stage) {
p = get_cached_data(XBZRLE.cache, current_addr);
}
} }
/* either we didn't send yet (we may have had XBZRLE overflow) */ /* either we didn't send yet (we may have had XBZRLE overflow) */
@ -538,7 +544,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
while ((ret = qemu_file_rate_limit(f)) == 0) { while ((ret = qemu_file_rate_limit(f)) == 0) {
int bytes_sent; int bytes_sent;
bytes_sent = ram_save_block(f); bytes_sent = ram_save_block(f, false);
/* no more blocks to sent */ /* no more blocks to sent */
if (bytes_sent < 0) { if (bytes_sent < 0) {
break; break;
@ -600,7 +606,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
while (true) { while (true) {
int bytes_sent; int bytes_sent;
bytes_sent = ram_save_block(f); bytes_sent = ram_save_block(f, true);
/* no more blocks to sent */ /* no more blocks to sent */
if (bytes_sent < 0) { if (bytes_sent < 0) {
break; break;