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[PATCH v9 07/12] migration/dirtyrate: Compare page hash results for reco
From: |
Chuan Zheng |
Subject: |
[PATCH v9 07/12] migration/dirtyrate: Compare page hash results for recorded sampled page |
Date: |
Tue, 15 Sep 2020 10:44:42 +0800 |
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>
---
migration/dirtyrate.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 5e6eedf..2d48eb8 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -177,6 +177,69 @@ out:
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_page_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_page_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)
{
/* todo */
--
1.8.3.1
- [PATCH v9 00/12] *** A Method for evaluating dirty page rate ***, Chuan Zheng, 2020/09/14
- [PATCH v9 09/12] migration/dirtyrate: Implement set_sample_page_period() and is_sample_period_valid(), Chuan Zheng, 2020/09/14
- [PATCH v9 01/12] migration/dirtyrate: setup up query-dirtyrate framwork, Chuan Zheng, 2020/09/14
- [PATCH v9 03/12] migration/dirtyrate: Add RamblockDirtyInfo to store sampled page info, Chuan Zheng, 2020/09/14
- [PATCH v9 07/12] migration/dirtyrate: Compare page hash results for recorded sampled page,
Chuan Zheng <=
- [PATCH v9 06/12] migration/dirtyrate: Record hash results for each sampled page, Chuan Zheng, 2020/09/14
- [PATCH v9 02/12] migration/dirtyrate: add DirtyRateStatus to denote calculation status, Chuan Zheng, 2020/09/14
- [PATCH v9 04/12] migration/dirtyrate: Add dirtyrate statistics series functions, Chuan Zheng, 2020/09/14
- [PATCH v9 08/12] migration/dirtyrate: skip sampling ramblock with size below MIN_RAMBLOCK_SIZE, Chuan Zheng, 2020/09/14