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[PATCH v6 07/12] migration/dirtyrate: Compare page hash results for reco
From: |
Chuan Zheng |
Subject: |
[PATCH v6 07/12] migration/dirtyrate: Compare page hash results for recorded sampled page |
Date: |
Sat, 29 Aug 2020 10:52:52 +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>
---
migration/dirtyrate.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index f4967fd..9cc2cbb 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -193,6 +193,69 @@ static int record_ramblock_hash_info(struct
RamblockDirtyInfo **block_dinfo,
return 0;
}
+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 int compare_page_hash_info(struct RamblockDirtyInfo *info,
+ int block_index)
+{
+ struct RamblockDirtyInfo *block_dinfo = NULL;
+ RAMBlock *block = NULL;
+
+ RAMBLOCK_FOREACH_MIGRATABLE(block) {
+ block_dinfo = find_page_matched(block, block_index + 1, info);
+ if (block_dinfo == NULL) {
+ continue;
+ }
+ calc_page_dirty_rate(block_dinfo);
+ update_dirtyrate_stat(block_dinfo);
+ }
+
+ if (!DirtyStat.total_sample_count) {
+ return -1;
+ }
+
+ return 0;
+}
+
static void calculate_dirtyrate(struct DirtyRateConfig config)
{
/* todo */
--
1.8.3.1
- Re: [PATCH v6 06/12] migration/dirtyrate: Record hash results for each sampled page, (continued)
- [PATCH v6 02/12] migration/dirtyrate: add DirtyRateStatus to denote calculation status, Chuan Zheng, 2020/08/28
- [PATCH v6 09/12] migration/dirtyrate: Implement set_sample_page_period() and get_sample_page_period(), Chuan Zheng, 2020/08/28
- [PATCH v6 10/12] migration/dirtyrate: Implement calculate_dirtyrate() function, Chuan Zheng, 2020/08/28
- [PATCH v6 08/12] migration/dirtyrate: skip sampling ramblock with size below MIN_RAMBLOCK_SIZE, Chuan Zheng, 2020/08/28
- [PATCH v6 05/12] migration/dirtyrate: move RAMBLOCK_FOREACH_MIGRATABLE into ram.h, Chuan Zheng, 2020/08/28
- [PATCH v6 07/12] migration/dirtyrate: Compare page hash results for recorded sampled page,
Chuan Zheng <=
- [PATCH v6 12/12] migration/dirtyrate: Add trace_calls to make it easier to debug, Chuan Zheng, 2020/08/28
- [PATCH v6 11/12] migration/dirtyrate: Implement qmp_cal_dirty_rate()/qmp_get_dirty_rate() function, Chuan Zheng, 2020/08/28
- Re: [PATCH v6 00/12] *** A Method for evaluating dirty page rate ***, David Edmondson, 2020/08/31