[PATCH v7 12/12] migration/dirtyrate: Add trace_calls to make it easier to debug

[Chuan Zheng]

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>
---
 migration/dirtyrate.c  | 9 +++++++++
 migration/trace-events | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index e9e9e35..0286ff4 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 get_sample_page_period(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;
 }
 
@@ -227,6 +232,8 @@ 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;
     }
 
@@ -273,6 +280,7 @@ 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++;
         }
     }
@@ -298,6 +306,7 @@ find_page_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 4ab0a50..8c2b58f 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -312,3 +312,11 @@ 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"
-- 
1.8.3.1