txn: seperate prewrite and commit in detail information and add clone methods

[cfzjywxk]

Ref: tikv/tikv#12362

As the CommitDetails is changed and it's directly used in the tidb code, this is a breaking change.

• Separate the prewrite and commit related details in execDetail. So it's more clear for the 2pc mode committed transactions.

{
   "prewrite":14.6ms,
   "get_commit_ts":521.9µs,
   "commit":6.67ms,
   "slowest_prewrite_rpc":{
      "total":0.015s,
      "region_id":2,
      "store":"127.0.0.1":20160,
      "tikv_wall_time":13.4ms,
      "scan_detail":{
         "get_snapshot_time":409µs,
         "rocksdb":{
            "block":{
               
            }
         }
      },
      "write_detail":{
         "store_batch_wait":246.3µs,
         "propose_send_wait":0s,
         "persist_log":{
            "total":8.82ms,
            "write_leader_wait":5.39µs,
            "sync_log":7.83ms,
            "write_memtable":76.1µs
         },
         "commit_log":9.31ms,
         "apply_batch_wait":179.8µs,
         "apply":{
            "total":1.01ms,
            "mutex_lock":654ns,
            "write_leader_wait":0s,
            "write_wal":179.8µs,
            "write_memtable":33.7µs
         }
      }
   },
   "commit_primary_rpc":{
      "total":0.007s,
      "region_id":2,
      "store":"127.0.0.1":20160,
      "tikv_wall_time":5.58ms,
      "scan_detail":{
         "get_snapshot_time":326µs,
         "rocksdb":{
            "block":{
               
            }
         }
      },
      "write_detail":{
         "store_batch_wait":292.6µs,
         "propose_send_wait":0s,
         "persist_log":{
            "total":1.72ms,
            "write_leader_wait":3.82µs,
            "sync_log":998.1µs,
            "write_memtable":51.3µs
         },
         "commit_log":2.08ms,
         "apply_batch_wait":146.6µs,
         "apply":{
            "total":799.7µs,
            "mutex_lock":625ns,
            "write_leader_wait":0s,
            "write_wal":146.6µs,
            "write_memtable":37.7µs
         }
      }
   },
   "region_num":1,
   "write_keys":1,
   "write_byte":29
}

• Implement the actual Clone methods for several structs.

Signed-off-by: cfzjywxk lsswxrxr@163.com

[zyguan]

LGTM

[zyguan]

Shall we also observe the number of prewrite/commit requests as well?

[cfzjywxk]

A new field PrewriteReqNum is added.

[sticnarf]

Where are the deep clones used? I'm afraid deep cloning such deep nested structures could be very expensive and if we really need to use it, it's probably unacceptable in performance

[cfzjywxk]

Where are the deep clones used? I'm afraid deep cloning such deep nested structures could be very expensive and if we really need to use it, it's probably unacceptable in performance

@sticnarf
By now clone happens when the binary plan is generated or the slow log information is printed, I'll verify it.
The tidb runtime-stat-related utilities use clone in many places but some of them are not clone actually, this is another risk in the current runtime-stat framework.

[cfzjywxk]

The CommitDetail may have just one commit information related typed object in tidb RootRuntime statistics, so it would not be cloned normally, the clone related changes are reverted.

[sticnarf]

LGTM. The tidb in integration tests have to be upgraded to make CI pass.

[cfzjywxk]

@sticnarf
As it's a breaking change the compatible test could not pass maybe we could merge it with tidb pr first?

[sticnarf]

@sticnarf As it's a breaking change the compatible test could not pass maybe we could merge it with tidb pr first?

The compatibility test is not required. Let me retry the failed integration test.

[cfzjywxk]

@sticnarf As it's a breaking change the compatible test could not pass maybe we could merge it with tidb pr first?

The compatibility test is not required. Let me retry the failed integration test.

It seems the integration test needs to build tidb like the compatibility test.

Error: ../../../../go/pkg/mod/github.com/defined2014/tidb@v1.1.0-beta.0.20220725074011-ee134690c221/util/execdetails/execdetails.go:162:27: commitDetails.Mu.BackoffTypes undefined (type struct{sync.Mutex; CommitBackoffTime int64; PrewriteBackoffTypes []string; CommitBackoffTypes []string; SlowestPrewrite util.ReqDetailInfo; CommitPrimary util.ReqDetailInfo} has no field or method BackoffTypes)