bk commit into 5.1 tree (pekka:1.2599)

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ChangeSet@1.2599, 2007-07-31 21:50:01+10:00, pekka@mysql.com +2 -0   [PATCH] 01_gcp_timer.diff   

  time gcp duration in master and
  send info event if it is excessive   

  Index: storage/ndb/src/kernel/blocks/dbdih/Dbdih.hpp

  storage/ndb/src/kernel/blocks/dbdih/Dbdih.hpp@1.43, 2007-07-31 10:00:00+10:00, pekka@mysql.com +6 -0     01_gcp_timer.diff

  storage/ndb/src/kernel/blocks/dbdih/DbdihMain.cpp@1.137, 2007-07-31 10:00:00+10:00, pekka@mysql.com +14 -0     01_gcp_timer.diff

# This is a BitKeeper patch. What follows are the unified diffs for the
# set of deltas contained in the patch. The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User: pekka
# Host: willster.(none)
# Root: /home/stewart/Documents/MySQL/5.1/telco-6.2

• 1.42/storage/ndb/src/kernel/blocks/dbdih/Dbdih.hpp 2007-06-27 19:23:21 +10:00 +++ 1.43/storage/ndb/src/kernel/blocks/dbdih/Dbdih.hpp 2007-07-31 10:00:00 +10:00 @@ -1283,6 +1283,12 @@

     Uint32 m_expectedNextWord;
   } c_copyGCISlave;

+
+  /*
+   * Time GCP in master DIH.
+   * Later can measure per node or per protocol parts.
+   */
+  MicroSecondTimer gcp_timer_start;
   
   /*------------------------------------------------------------------------*/
   /*       THIS VARIABLE IS USED TO KEEP TRACK OF THE STATE OF LOCAL        */

--- 1.136/storage/ndb/src/kernel/blocks/dbdih/DbdihMain.cpp	2007-06-27 19:23:21 +10:00
+++ 1.137/storage/ndb/src/kernel/blocks/dbdih/DbdihMain.cpp	2007-07-31 10:00:00 +10:00

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   signal->theData[1] = cnewgcp;
   sendSignal(CMVMI_REF, GSN_EVENT_REP, signal, 2, JBB);  

+ NdbTick_getMicroTimer(&gcp_timer_start); +

   CRASH_INSERTION(7000);
   cnewgcp++;
   signal->setTrace(TestOrd::TraceGlobalCheckpoint); @@ -8530,6 +8532,18 @@

     signal->theData[0] = NDB_LE_GlobalCheckpointCompleted; //Event type
     signal->theData[1] = coldgcp;
     sendSignal(CMVMI_REF, GSN_EVENT_REP, signal, 2, JBB);    
+
+    {
+      MicroSecondTimer stop;
+      NdbTick_getMicroTimer(&stop);
+      NDB_TICKS ticks = NdbTick_getMicrosPassed(gcp_timer_start, stop);
+      Uint32 ms = ticks / 1000;
+      // random formula to report excessive duration
+      bool report = ms > 3000 * (1 + cgcpDelay / 1000);
+      if (report)
+        infoEvent("GCP %u duration %u ms (config %u ms)",
+                  coldgcp, ms, cgcpDelay);

     c_newest_restorable_gci = coldgcp;  

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