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From zuyu <...@git.apache.org>
Subject [GitHub] incubator-quickstep pull request #36: QUICKSTEP-24 Report generation support...
Date Fri, 17 Jun 2016 05:14:23 GMT
Github user zuyu commented on a diff in the pull request:

    https://github.com/apache/incubator-quickstep/pull/36#discussion_r67461549
  
    --- Diff: query_execution/Foreman.cpp ---
    @@ -229,4 +229,22 @@ void Foreman::sendWorkerMessage(const size_t worker_thread_index,
           << worker_directory_->getClientID(worker_thread_index);
     }
     
    +#ifdef QUICKSTEP_ENABLE_WORKORDER_PROFILING
    +void Foreman::printWorkOrderProfilingResults(std::FILE *out) const {
    +  const std::vector<
    +      std::tuple<std::size_t, std::size_t, std::size_t, std::size_t>>
    +      &recorded_times = policy_enforcer_->getProfilingResults();
    +  fputs("Worker ID, NUMA Socket, Query ID, Operator ID, Time (microseconds)\n", out);
    +  for (auto workorder_entry : recorded_times) {
    +    // Note: Index of the "worker thread index" in the tuple is 0.
    +    const std::size_t worker_id = std::get<0>(workorder_entry);
    +    fprintf(out, "%lu,", worker_id);
    +    fprintf(out, "%d,", worker_directory_->getNUMANode(worker_id));
    +    fprintf(out, "%lu,", std::get<1>(workorder_entry));
    +    fprintf(out, "%lu,", std::get<2>(workorder_entry));
    +    fprintf(out, "%lu\n", std::get<3>(workorder_entry));
    --- End diff --
    
    How about merging these `fprintf`s into one?
    
    Although this is not in a critical path, we still save tons of system calls.


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