Commit 9f5f380b authored by Liang Li's avatar Liang Li Committed by Juan Quintela
Browse files

migration: reduce the count of strlen call 



'strlen' is called three times in 'save_page_header', it's
inefficient.

Signed-off-by: default avatarLiang Li <liang.z.li@intel.com>
Reviewed-by: default avatarJuan Quintela <quintela@redhat.com>
Reviewed-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarJuan Quintela <quintela@redhat.com>
parent 48212d87

migration/ram.c

+5 −5
Original line number Diff line number Diff line
@@ -382,16 +382,16 @@ void migrate_compress_threads_create(void) 
 */

static size_t save_page_header(QEMUFile *f, RAMBlock *block, ram_addr_t offset)

{

    size_t size;

    size_t size, len;



    qemu_put_be64(f, offset);

    size = 8;



    if (!(offset & RAM_SAVE_FLAG_CONTINUE)) {

        qemu_put_byte(f, strlen(block->idstr));

        qemu_put_buffer(f, (uint8_t *)block->idstr,

                        strlen(block->idstr));

        size += 1 + strlen(block->idstr);

        len = strlen(block->idstr);

        qemu_put_byte(f, len);

        qemu_put_buffer(f, (uint8_t *)block->idstr, len);

        size += 1 + len;

    }

    return size;

}