adjust logging

bin/atlas-agent.cc

@@ -243,27 +243,29 @@ void collect_system_metrics(TaggingRegistry* registry, std::unique_ptr<atlasagen
   // the first call to this gather function takes >1 second, so it must
   // be done before we start calculating times to wait for peak metrics
   gather_slow_system_metrics(&proc, &disk, &ethtool, &ntp, &pressureStall, &aws);
-  Logger()->info("First publish");
+  Logger()->info("Published slow system metrics (first iteration)");
 
   auto now = system_clock::now();
   auto next_run = now;
   auto next_slow_run = now + seconds(60);
   std::chrono::nanoseconds time_to_sleep;
 
   do {
+    auto start = system_clock::now();
     gather_peak_system_metrics(&proc);
     gather_scaling_metrics(&cpufreq);
-    auto start = system_clock::now();
+
     if (start >= next_slow_run) {
       gather_slow_system_metrics(&proc, &disk, &ethtool, &ntp, &pressureStall, &aws);
-      auto elapsed = duration_cast<milliseconds>(system_clock::now() - start);
-      Logger()->info("Published system metrics (delay={})", elapsed);
       perf_metrics.collect();
       if (gpu) {
         gpu->gpu_metrics();
       }
+      auto elapsed = duration_cast<milliseconds>(system_clock::now() - start);
+      Logger()->info("Published system metrics (delay={})", elapsed);
       next_slow_run += seconds(60);
     }
+
     next_run += seconds(1);
     time_to_sleep = next_run - system_clock::now();
   } while (runner.wait_for(time_to_sleep));