Merge remote-tracking branch 'upstream/main' into add-pynvbench

Author: oleksandr-pavlyk

nvbench/detail/measure_cold.cu

@@ -242,7 +242,7 @@ void measure_cold_base::generate_summaries()
     auto &summ = m_state.add_summary("nv/cold/time/cpu/stdev/absolute");
     summ.set_string("name", "Noise");
     summ.set_string("hint", "percentage");
-    summ.set_string("description", "Relative standard deviation of isolated CPU times");
+    summ.set_string("description", "Standard deviation of isolated CPU times");
     summ.set_float64("value", cpu_stdev);
     summ.set_string("hide", "Hidden by default.");
   }

nvbench/detail/measure_cold.cuh

@@ -153,18 +153,16 @@ struct measure_cold_base::kernel_launch_timer
       m_measure.gpu_frequency_start();
     }
     m_measure.m_cuda_timer.start(m_measure.m_launch.get_stream());
-    if (m_disable_blocking_kernel)
-    {
-      m_measure.m_cpu_timer.start();
-    }
+    // start CPU timer irrespective of use of blocking kernel
+    // Ref: https://github.com/NVIDIA/nvbench/issues/249
+    m_measure.m_cpu_timer.start();
   }
 
   __forceinline__ void stop()
   {
     m_measure.m_cuda_timer.stop(m_measure.m_launch.get_stream());
     if (!m_disable_blocking_kernel)
     {
-      m_measure.m_cpu_timer.start();
       m_measure.unblock_stream();
     }
     if (m_measure.m_check_throttling)