96 lines
2.5 KiB
Diff
96 lines
2.5 KiB
Diff
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From 949612c5bbc5414970aed7d7ec9390a058ee2246 Mon Sep 17 00:00:00 2001
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From: Chuan Zheng <zhengchuan@huawei.com>
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Date: Wed, 16 Sep 2020 14:22:02 +0800
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Subject: [PATCH] migration/dirtyrate: Compare page hash results for recorded
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sampled page
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Compare page hash results for recorded sampled page.
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Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
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Signed-off-by: YanYing Zhuang <ann.zhuangyanying@huawei.com>
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Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Reviewed-by: Li Qiang <liq3ea@gmail.com>
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Message-Id: <1600237327-33618-8-git-send-email-zhengchuan@huawei.com>
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Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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---
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migration/dirtyrate.c | 63 +++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 63 insertions(+)
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diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
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index f93601f8ab..0412f825dc 100644
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--- a/migration/dirtyrate.c
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+++ b/migration/dirtyrate.c
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@@ -177,6 +177,69 @@ out:
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return ret;
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}
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+static void calc_page_dirty_rate(struct RamblockDirtyInfo *info)
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+{
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+ uint32_t crc;
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+ int i;
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+
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+ for (i = 0; i < info->sample_pages_count; i++) {
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+ crc = get_ramblock_vfn_hash(info, info->sample_page_vfn[i]);
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+ if (crc != info->hash_result[i]) {
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+ info->sample_dirty_count++;
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+ }
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+ }
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+}
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+
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+static struct RamblockDirtyInfo *
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+find_block_matched(RAMBlock *block, int count,
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+ struct RamblockDirtyInfo *infos)
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+{
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+ int i;
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+ struct RamblockDirtyInfo *matched;
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+
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+ for (i = 0; i < count; i++) {
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+ if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) {
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+ break;
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+ }
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+ }
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+
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+ if (i == count) {
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+ return NULL;
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+ }
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+
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+ if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) ||
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+ infos[i].ramblock_pages !=
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+ (qemu_ram_get_used_length(block) >> TARGET_PAGE_BITS)) {
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+ return NULL;
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+ }
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+
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+ matched = &infos[i];
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+
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+ return matched;
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+}
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+
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+static bool compare_page_hash_info(struct RamblockDirtyInfo *info,
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+ int block_count)
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+{
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+ struct RamblockDirtyInfo *block_dinfo = NULL;
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+ RAMBlock *block = NULL;
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+
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+ RAMBLOCK_FOREACH_MIGRATABLE(block) {
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+ block_dinfo = find_block_matched(block, block_count, info);
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+ if (block_dinfo == NULL) {
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+ continue;
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+ }
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+ calc_page_dirty_rate(block_dinfo);
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+ update_dirtyrate_stat(block_dinfo);
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+ }
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+
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+ if (DirtyStat.total_sample_count == 0) {
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+ return false;
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+ }
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+
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+ return true;
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+}
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+
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static void calculate_dirtyrate(struct DirtyRateConfig config)
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{
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/* todo */
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--
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2.27.0
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