diff --git a/migration-dirtyrate-Add-trace_calls-to-make-it-easie.patch b/migration-dirtyrate-Add-trace_calls-to-make-it-easie.patch
new file mode 100644
index 0000000..79d825c
--- /dev/null
+++ b/migration-dirtyrate-Add-trace_calls-to-make-it-easie.patch
@@ -0,0 +1,99 @@
+From 8a36332d38c0c0ba6b7d8c096367a4ec7c94e522 Mon Sep 17 00:00:00 2001
+From: Chuan Zheng <zhengchuan@huawei.com>
+Date: Wed, 16 Sep 2020 14:22:07 +0800
+Subject: [PATCH] migration/dirtyrate: Add trace_calls to make it easier to
+ debug
+
+Add trace_calls to make it easier to debug
+
+Signed-off-by: Chuan Zheng <zhengchuan@huawei.com>
+Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
+Reviewed-by: David Edmondson <david.edmondson@oracle.com>
+Message-Id: <1600237327-33618-13-git-send-email-zhengchuan@huawei.com>
+Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
+---
+ migration/dirtyrate.c  | 9 +++++++++
+ migration/trace-events | 8 ++++++++
+ 2 files changed, 17 insertions(+)
+
+diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
+index 9d9155f8ab..80936a4ca6 100644
+--- a/migration/dirtyrate.c
++++ b/migration/dirtyrate.c
+@@ -22,6 +22,7 @@
+ #include "qapi/qapi-commands-migration.h"
+ #include "migration.h"
+ #include "ram.h"
++#include "trace.h"
+ #include "dirtyrate.h"
+ 
+ static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED;
+@@ -54,6 +55,7 @@ static bool is_sample_period_valid(int64_t sec)
+ static int dirtyrate_set_state(int *state, int old_state, int new_state)
+ {
+     assert(new_state < DIRTY_RATE_STATUS__MAX);
++    trace_dirtyrate_set_state(DirtyRateStatus_str(new_state));
+     if (atomic_cmpxchg(state, old_state, new_state) == old_state) {
+         return 0;
+     } else {
+@@ -76,6 +78,8 @@ static struct DirtyRateInfo *query_dirty_rate_info(void)
+     info->start_time = DirtyStat.start_time;
+     info->calc_time = DirtyStat.calc_time;
+ 
++    trace_query_dirty_rate_info(DirtyRateStatus_str(CalculatingState));
++
+     return info;
+ }
+ 
+@@ -123,6 +127,7 @@ static uint32_t get_ramblock_vfn_hash(struct RamblockDirtyInfo *info,
+     crc = crc32(0, (info->ramblock_addr +
+                 vfn * TARGET_PAGE_SIZE), TARGET_PAGE_SIZE);
+ 
++    trace_get_ramblock_vfn_hash(info->idstr, vfn, crc);
+     return crc;
+ }
+ 
+@@ -201,6 +206,8 @@ static bool skip_sample_ramblock(RAMBlock *block)
+      * Sample only blocks larger than MIN_RAMBLOCK_SIZE.
+      */
+     if (qemu_ram_get_used_length(block) < (MIN_RAMBLOCK_SIZE << 10)) {
++        trace_skip_sample_ramblock(block->idstr,
++                                   qemu_ram_get_used_length(block));
+         return true;
+     }
+ 
+@@ -260,6 +267,7 @@ static void calc_page_dirty_rate(struct RamblockDirtyInfo *info)
+     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]) {
++            trace_calc_page_dirty_rate(info->idstr, crc, info->hash_result[i]);
+             info->sample_dirty_count++;
+         }
+     }
+@@ -285,6 +293,7 @@ find_block_matched(RAMBlock *block, int count,
+     if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) ||
+         infos[i].ramblock_pages !=
+             (qemu_ram_get_used_length(block) >> TARGET_PAGE_BITS)) {
++        trace_find_page_matched(block->idstr);
+         return NULL;
+     }
+ 
+diff --git a/migration/trace-events b/migration/trace-events
+index d8e54c367a..69620c43c2 100644
+--- a/migration/trace-events
++++ b/migration/trace-events
+@@ -296,3 +296,11 @@ dirty_bitmap_load_bits_zeroes(void) ""
+ dirty_bitmap_load_header(uint32_t flags) "flags 0x%x"
+ dirty_bitmap_load_enter(void) ""
+ dirty_bitmap_load_success(void) ""
++
++# dirtyrate.c
++dirtyrate_set_state(const char *new_state) "new state %s"
++query_dirty_rate_info(const char *new_state) "current state %s"
++get_ramblock_vfn_hash(const char *idstr, uint64_t vfn, uint32_t crc) "ramblock name: %s, vfn: %"PRIu64 ", crc: %" PRIu32
++calc_page_dirty_rate(const char *idstr, uint32_t new_crc, uint32_t old_crc) "ramblock name: %s, new crc: %" PRIu32 ", old crc: %" PRIu32
++skip_sample_ramblock(const char *idstr, uint64_t ramblock_size) "ramblock name: %s, ramblock size: %" PRIu64
++find_page_matched(const char *idstr) "ramblock %s addr or size changed"
+-- 
+2.27.0
+