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From nonstop-qfchen <...@git.apache.org>
Subject [GitHub] incubator-trafodion pull request: fix JIRA-1739 to aggressively al...
Date Thu, 07 Jan 2016 16:49:06 GMT
Github user nonstop-qfchen commented on a diff in the pull request:

    https://github.com/apache/incubator-trafodion/pull/250#discussion_r49094833
  
    --- Diff: core/sql/sqlcomp/nadefaults.cpp ---
    @@ -4333,59 +4336,8 @@ void NADefaults::updateSystemParameters(NABoolean reInit)
     
         case MAX_ESPS_PER_CPU_PER_OP:
           {
    -        // set 2 ESPs per node, as a starting point.
    -        #define DEFAULT_ESPS_PER_NODE 2
    -
    -        Lng32 numESPsPerNode = DEFAULT_ESPS_PER_NODE;
    -        Lng32 coresPerNode = 1;        
    -          // Make sure the gpClusterInfo points at an NAClusterLinux object.
    -          // In osim simulation mode, the pointer can point at a NAClusterNSK
    -          // object, for which the method numTSEsForPOS() is not defined.
    -        NAClusterInfoLinux* gpLinux = dynamic_cast<NAClusterInfoLinux*>(gpClusterInfo);
    -
    -          // number of POS TSE
    -        Lng32 numTSEsPerCluster = gpLinux->numTSEsForPOS();
    -
    -          // cluster nodes
    -        Lng32 nodesdPerCluster = gpClusterInfo->getTotalNumberOfCPUs();
    -
    -          // TSEs per node
    -        Lng32 TSEsPerNode = numTSEsPerCluster/nodesdPerCluster;
    -
    -          // cores per node
    -        coresPerNode = gpClusterInfo->numberOfCpusPerSMP();
    -
    -          // For Linux/nt, we conservatively allocate ESPs per node as follows
    -          // - 1 ESP per 2 cpu cores if cores are equal or less than TSEs
    -          // - 1 ESP per TSE if number of cores is more than double the TSEs
    -          // - 1 ESP per 2 TSEs if cores are more than TSEs but less than double the
TSEs
    -          // - 1 ESP per node. Only possible on NT or workstations
    -          //      - number of cores less than TSEs and there are 1 or 2 cpur cores per
node
    -          //      - number of TSEs is less than cpu cores and there 1 or 2 TSEs per node.
    -          //        This case is probable if virtual nodes are used
    -
    -          // TSEsPerNode is 0 for arkcmps started by the seapilot universal comsumers
    -          // in this case we only consider cpu cores
    -        if ((coresPerNode <= TSEsPerNode) || (TSEsPerNode == 0))
    -        {
    -            if (coresPerNode > 1)
    -                numESPsPerNode = DEFAULT_ESPS_PER_NODE; 
    -        }
    -        else if (coresPerNode > (TSEsPerNode*2))
    -        {
    -             numESPsPerNode = TSEsPerNode;
    -        }
    -        else if (TSEsPerNode > 1)
    -        {
    -             numESPsPerNode = TSEsPerNode/2;
    -        }
    -        else // not really needed since numESPsPerNode is set to 1 from above
    -        {
    -             numESPsPerNode = DEFAULT_ESPS_PER_NODE;
    -        }
    -        
    -
    -        ftoa_((float)(numESPsPerNode)/(float)(coresPerNode), valuestr);
    +        float espsPerCore = computeNumESPsPerCore(FALSE);
    --- End diff --
    
    The performance test will test the aggressive mode first, without additional parameters
to adjust. 


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