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migration/dirtyrate: Compare page hash results for recorded sampled page

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Compare page hash results for recorded sampled page.

Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
Signed-off-by: YanYing Zhuang <ann.zhuangyanying@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <1600237327-33618-8-git-send-email-zhengchuan@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Chuan Zheng 2020-09-16 14:22:02 +08:00 committed by Dr. David Alan Gilbert
parent ba0e519f95
commit 9c04387b88
1 changed files with 63 additions and 0 deletions
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63
migration/dirtyrate.c
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@ -177,6 +177,69 @@ out:
return ret; return ret;
} }
static void calc_page_dirty_rate(struct RamblockDirtyInfo *info)
{
uint32_t crc;
int i;
for (i = 0; i < info->sample_pages_count; i++) {
crc = get_ramblock_vfn_hash(info, info->sample_page_vfn[i]);
if (crc != info->hash_result[i]) {
info->sample_dirty_count++;
}
}
}
static struct RamblockDirtyInfo *
find_block_matched(RAMBlock *block, int count,
struct RamblockDirtyInfo *infos)
{
int i;
struct RamblockDirtyInfo *matched;
for (i = 0; i < count; i++) {
if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) {
break;
}
}
if (i == count) {
return NULL;
}
if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) ||
infos[i].ramblock_pages !=
(qemu_ram_get_used_length(block) >> TARGET_PAGE_BITS)) {
return NULL;
}
matched = &infos[i];
return matched;
}
static bool compare_page_hash_info(struct RamblockDirtyInfo *info,
int block_count)
{
struct RamblockDirtyInfo *block_dinfo = NULL;
RAMBlock *block = NULL;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
block_dinfo = find_block_matched(block, block_count, info);
if (block_dinfo == NULL) {
continue;
}
calc_page_dirty_rate(block_dinfo);
update_dirtyrate_stat(block_dinfo);
}
if (DirtyStat.total_sample_count == 0) {
return false;
}
return true;
}
static void calculate_dirtyrate(struct DirtyRateConfig config) static void calculate_dirtyrate(struct DirtyRateConfig config)
{ {
/* todo */ /* todo */